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Journal of cleaner production 99건

  1. [해외논문]   Editorial Board   SCIE


    Journal of cleaner production v.184 ,pp. ii - ii , 2018 , 0959-6526 ,

    초록

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  2. [해외논문]   Tar reduction mechanism via compression of producer gas   SCIE

    Ud Din, Zia (School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia ) , Zainal, Z.A. (School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia)
    Journal of cleaner production v.184 ,pp. 1 - 11 , 2018 , 0959-6526 ,

    초록

    Abstract Tar is the main impurity derived from biomass gasification which causes environmental hazards as well as technical problems in advanced power generation applications. Removal of tar to acceptable tolerance limits for Internal Combustion (IC) engines and fuel cells is one of the major limitations and considered the main obstacle to the wide commercial power generation using biomass producer gas. If tar is not removed to the required levels, it will condense at low temperatures and result in clogging and fouling of engines. Even though physical tar removal at low temperatures has been performing effectively with the technical and economical point of view, there is still need to explore new and more efficient tar removal techniques. In this work, compression of producer gas in a compressor is introduced as a tar cleaning mechanism of biomass tar. Compressor was exposed to low tar levels in the range of 138–312 ± 31 mg Nm −3 after the cooling and pre-cleaning system. The results demonstrate the effectiveness of the compression process in reducing tar by 84.4± 1.2% and 83± 1.1% when compressed to 0.8 MPa g and 0.2 MPa g respectively at ambient temperature. The blue colour flare after the compression indicates the clean producer gas from tar and corresponds to the total tar levels around and below 30 mg Nm −3 with negligible particulates in the producer gas as compared to the orange flare before the compression. It was found that tar condenses inside the compressor receiver tank. A mechanism explaining the condensation of tar in the compression process is proposed. Highlights Producer gas compression is introduced as a biomass tar cleaning mechanism. Compression process reduces the producer gas tar content by ≈ 84%. Tar condensation mechanism during the compression process is proposed. Clear blue color flare of producer gas corresponds to ≤30 mg Nm −3 of tar in it. Compressor has shown durability for 504 h on real tar levels up to 312 mg Nm −3 .

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [해외논문]   Numerical simulation of enhancement in CO2 sequestration with various water production schemes under multiple well scenarios   SCIE

    Chen, Li (Washington University in St. Louis, 1 Brookings Dr., St. Louis, MO 63130, USA ) , Liu, Danqing (State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China ) , Agarwal, Ramesh (Washington University in St. Louis, 1 Brookings Dr., St. Louis, MO 63130, USA)
    Journal of cleaner production v.184 ,pp. 12 - 20 , 2018 , 0959-6526 ,

    초록

    Abstract To determine the best CO 2 injection and brine production strategy for achieving both the optimal water production and the optimal CO 2 storage capacity while maintaining operational safety in CO 2 enhanced brine production, three injection scenarios based on the typical geological parameters of the Junggar Basin in China are compared. They are the sole CO 2 injection, sole water production and combined CO 2 enhanced water recovery, and for the combined CO 2 enhanced water recovery scenario, both the co-production of brine and pre-production of brine are considered. It is found that compared to the pre-production of brine, the combination of pre- and co-production of brine can be more effective in controlling the pressure perturbation and in increasing the CO 2 storage capacity. However the volume of co-produced brine plays a smaller role in the pressure build-up. The influence of number of pumping wells is also analyzed. Although increasing the number of wells can enhance the CO 2 storage, the economic analysis reveals that the revenue in water production and CO 2 storage cannot compensate the expensive investment required in well drilling. The injection strategy is essential to the efficiency of CO 2 enhanced water recovery; this paper compares the strategies for pre-production and co-production of brine on CO 2 enhanced shale gas recovery. The conclusions given in this paper can serve as a reference for the design engineers interested in CO 2 storage with co-production of brine. Highlights Brine Pre-injection is used for enhancing combined CO 2 storage and brine production. Co-injection of CO 2 with brine production enhances CO 2 sequestration. Pre-injection of brine results in longer injection time with more CO 2 injected. Three- and five-wells provide more CO 2 storage and brine production.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  4. [해외논문]   Application of steel slag powder to enhance the low-temperature fracture properties of asphalt mastic and its corresponding mechanism   SCIE

    Li, Qiushi (School of Civil Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, China ) , Qiu, Yanjun (School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China ) , Rahman, Ali (School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China ) , Ding, Haibo (School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)
    Journal of cleaner production v.184 ,pp. 21 - 31 , 2018 , 0959-6526 ,

    초록

    Abstract This paper aims to study the application of the steel slag powder in asphalt to analyze how it may influence the low-temperature fracture performance of asphalt materials. To fulfill this objective, in this study two different kinds of modified asphalt binders (one is dodecylbenzene sulfonic acid modified asphalt, and another is SBS polymer modified asphalt) were selected, and their behavior after adding steel slag powder was compared with regular limestone powder. Extended bending beam rheometer (Ex-BBR) test and double edge notched tension (DENT) test were employed to characterize low strain rheological and high strain ductile fracture properties of the asphalt binders and asphalt mastics, respectively. The results showed that although dodecylbenzene sulfonic acid (DBSA) modified asphalt and SBS modified asphalt held similar AASHTO M320 regular high-temperature and low-temperature performance grade, their 72hr limiting low-temperature performance grade, and strain tolerance may vary significantly. Moreover, adding 5% larger particle steel slag powder can alleviate the severity of reversible aging due to its higher CaO content than that of limestone powder. As a result, it can absorb more polar components (asphaltene) of asphalt. Apart from this, tougher surface texture and higher specific surface area of larger particle steel slag are also contributing factors in absorbing more asphaltene. Finally, the crack tip opening displacement (CTOD) of two kinds of steel slag powder systems were much higher than that of the limestone powder mastic system under higher temperature and slower loading rate. Highlights Application of steel slag powder as substitution of mineral powder. Steel slag powder system had higher fracture resistance than conventional system. Reduction in the reversible aging due to addition of 5% larger particle steel slag powder. Steel slag powder can diminish the severity of low-temperature reversible aging of modified asphalt. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  5. [해외논문]   Preventing household food waste via nudging: An exploration of consumer perceptions   SCIE

    von Kameke, Carolin (Corresponding author.) , Fischer, Daniel
    Journal of cleaner production v.184 ,pp. 32 - 40 , 2018 , 0959-6526 ,

    초록

    Abstract Current food consumption and production cannot be considered sustainable due to extensive ecological, social and economic issues along the supply chain. Reducing food waste is a major instrument in increasing food security and alleviating environmental pressure and thus increasing sustainable food consumption. In Germany, the main generators of food waste are private households. The typical approach to mitigate this is to better inform consumers by means of awareness campaigns. However, research shows that additional solutions are required to tackle the problem of household food waste. Nudging is a relatively new approach to guide consumer behavior gently into a certain direction but there is little experience with its application in the field of consumption politics, let alone food waste reduction. The study addresses this research gap and conducts a first exploratory analysis of the possibilities to reduce household food waste via nudging. The study focuses on the use of food purchase plans as a means to reduce household food waste. It analyses 101 personal questionnaires which were carried out to extract consumers' preferences in this respect. The evidence shows that respondents are open to a change of behavior and also to the use of purchase plans. Furthermore they are interested in feedback on individual food wasting behavior, specific advice on meal planning and social interaction on this topic with their communities. The results also show that young respondents and those living in large households with families are more open to changing their behavior in this respect. These results may be used to gain first experiences in using nudging to reduce household food waste; however, future research is needed to validate and build on these results.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [해외논문]   Alkali-activated calcined smectite clay blended with waste calcium carbonate as a low-carbon binder   SCIE

    Valentini, Luca (Department of Geosciences, University of Padua, via Gradenigo 6, 35131, Padua, Italy ) , Contessi, Silvia (Department of Geosciences, University of Padua, via Gradenigo 6, 35131, Padua, Italy ) , Dalconi, Maria C. (Department of Geosciences, University of Padua, via Gradenigo 6, 35131, Padua, Italy ) , Zorzi, Federico (Department of Geosciences, University of Padua, via Gradenigo 6, 35131, Padua, Italy ) , Garbin, Enrico (Department of Civil, Architectural and Environmental Engineering, University of Padua, via Gradenigo 6, 35131, Padua, Italy)
    Journal of cleaner production v.184 ,pp. 41 - 49 , 2018 , 0959-6526 ,

    초록

    Abstract Reconciling the need of producing reliable building materials, with that of drastically cutting greenhouse gas emissions represents one of the current fundamental technological and societal challenges. To this end, we assessed the performance of a binder alternative to ordinary Portland cement (OPC) based on the alkali activation of a blend of locally sampled, impure calcined clay of smectitic composition, with waste calcium carbonate from the marble industry. The microstructure of the final product was investigated by means of scanning electron microscopy and X-ray tomography, and the phase composition by X-ray diffraction, implementing the PONKCS (partial or not known crystal structure) approach. Results of compressive strength tests show an adequate mechanical performance of these materials, with values of the compressive strength as high as 60 MPa after 20 days under room temperature curing. Replacement of a small quantity of the alkaline activator with sodium citrate induces enhanced workability and mechanical performance, reducing the amount of entrained air voids. The use of alkali activated calcined smectite clay – waste calcium carbonate blends represents a valuable complementary approach with respect to alkali activation of metakaolin and calcined kaolinite clay – OPC blends, towards the development of carbon-free binders. Highlights Alkali-activated calcined smectite clay was used to produce a low-carbon binder. Blending with waste Ca-carbonate improves strength and adds environmental value. Addition of sodium citrate enhanced workability and mechanical performance. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  7. [해외논문]   Global water transfers embodied in international trade: Tracking imbalanced and inefficient flows   SCIE

    Han, M.Y. (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, PR China ) , Chen, G.Q. (Laboratory of Systems Ecology and Sustainability Science, College of Engineering, Peking University, Beijing, 100871, PR China ) , Li, Y.L. (Laboratory of Systems Ecology and Sustainability Science, College of Engineering, Peking University, Beijing, 100871, PR China)
    Journal of cleaner production v.184 ,pp. 50 - 64 , 2018 , 0959-6526 ,

    초록

    Abstract In light of the increasingly serious resource crisis in the context of global regional connectivity, a detailed analysis for embodied water flows in global supply chains is conducted involving more than 180 countries/regions. Based on the multi-regional database, this work attempts to explore the rules of embodied water transfers and the ways in which imbalance and inefficiencies in the new stage of globalization can be relieved. Overall, water embodied in trade flows, also known as embodied water, is estimated near one third the volume of global water withdrawal. Mainland China is the world's leading gross embodied water exporter with 114.47 billion m 3 , in contrast to the United States as the leading importer with 151.39 million m 3 . Under the background of resources distribution, trade acts as a mechanism to enable wealthy consumers to shift stress to their trading partners, leading to a more complex context of imbalance. As the most water-deficient region, the Middle East virtually receives 30 million m 3 of embodied water; however most of the less developed regions including African countries are always large embodied water suppliers, requiring urgent, global attention. With the detailed data supports, this study provides systematical accounting on embodied water transfers, conducts comprehensive analyses on transfer patterns, efficiencies, and pressures, and identifies imbalanced and inefficient embodied water transfers among countries/regions, attempting to map out an inclusive and sustained transfer path and lay an essential foundation for globe resources use in the new stage of globalization. Highlights Global water transfers embodied in international trade are analyzed. Water embodied in international trade is nearly 1/3 the global water withdrawal. Embodied water transfer patterns, efficiencies, and pressures are assessed. Imbalanced and inefficient embodied water transfers are identified. Embodied water issues in the Middle East and Africa are assessed. Graphical abstract Global embodied water transfer and water resource per capita. [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [해외논문]   Prisoner's dilemma on competing retailers' investment in green supply chain management   SCIE

    Yan, Yingchen (College of Management and Economics, Tianjin University, Tianjin 300072, China ) , Zhao, Ruiqing (College of Management and Economics, Tianjin University, Tianjin 300072, China ) , Chen, Huiru (College of Mathematics and Physics, Huanggang Normal University, Hubei 438000, China)
    Journal of cleaner production v.184 ,pp. 65 - 81 , 2018 , 0959-6526 ,

    초록

    Abstract Nowadays, along with increased public environmental awareness and widespread upstream investments in green production, some retailers have begun to invest in the packaging and distribution processes to shape their public images and enhance their competitiveness. However, under the pressure of competition and existing upstream investments, retailers' incentives to invest may be weakened. In this paper, we study whether and when competing retailers should invest and explore the performance of the equilibrium outcome. First, we find that a retailer prefers to invest only with a high efficiency, which can endow her with a considerable demand improvement at an acceptable cost level. Second, we demonstrate that a retailer counterintuitively will not always benefit from her rival's investment inefficiency because the manufacturer in this case will reduce his investment level, which cannot sufficiently expand the product market size. Third, we verify the existence of a prisoner's dilemma for retailers under a medium investment efficiency because although green investment enhances demand, it also increases the unit cost and subsequently the retail price. Additionally, a retailer facing competition is especially unwilling to improve her price compared with her rival. Fourth, we present an interesting insight that the prisoner’ dilemma area will be decreased with a sufficient upstream investment efficiency since a retailer will focus less on the downstream competition for market occupation but more on the upstream investment that can expand the total market size. The decreased hostility alleviates the prisoner’ dilemma. Highlights We study whether and when competing retailers should make green investment. A prisoner's dilemma for retailers will exist under medium investment efficiencies. A retailer will not always benefit from her rival's investment inefficiency. The lower upstream green investment can decrease the downstream investments. The upstream investment inefficiency can increase the prisoner’ dilemma area.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  9. [해외논문]   A method of strategic evaluation of energy performance of Building Integrated Photovoltaic in the urban context   SCIE

    Costanzo, V. (School of the Built Environment, University of Reading, RG6 6AW, Reading, UK ) , Yao, R. (School of the Built Environment, University of Reading, RG6 6AW, Reading, UK ) , Essah, E. (School of the Built Environment, University of Reading, RG6 6AW, Reading, UK ) , Shao, L. (School of the Built Environment, University of Reading, RG6 6AW, Reading, UK ) , Shahrestani, M. (School of the Built Environment, University of Reading, RG6 6AW, Reading, UK ) , Oliveira, A.C. (Centre for Renewable Energy Research, University of Porto, 4200-465, Porto, Portugal ) , Araz, M. (Department of Energy Systems Engineering, Faculty of Engineering, Yasar University, 35100, Izmir, Turkey ) , Hepbasli, A. (Department of Energy Systems Engineering, Faculty of Engineering, Yasar University, 35100, Izmir, Turkey ) , Biyik, E. (Department of Energy Systems Engineering, Faculty of Engineering, Yasar University, 35100, Izmir, Turkey)
    Journal of cleaner production v.184 ,pp. 82 - 91 , 2018 , 0959-6526 ,

    초록

    Abstract This paper presents an integrated bottom-up approach aimed at helping those dealing with strategical analysis of installation of Building Integrated Photo Voltaic (BIPV) to estimate the electricity production potential along with the energy needs of urban buildings at the district scale. On the demand side, hourly energy profiles are generated using dynamic building simulation taking into account actual urban morphologies. On the supply side, electricity generated from the system is predicted considering both the direct and indirect components of solar radiation as well as local climate variables. Python-based Algorithm editor Grasshopper is used to interlink four types of modelling and simulation tools as 1) generation of 3-D model, 2) solar radiation analysis, 3) formatting weather files (TMY data set) and 4) dynamic energy demand. The method has been demonstrated for a cluster of 20 buildings located in the Yasar University in Izmir (Turkey), for which it is found the BIPV system could achieve an annual renewable share of 23%, in line with the Renewable Energy Directive target of 20%. Quantitatively-compared demand and supply information at hourly time step shows that only some energy needs can be met by BIPV, so there is a need for an appropriate matching strategy to better exploit the renewable energy potential. Highlights A bottom-up approach to estimate BIPV electricity yield in urban buildings. Python-based algorithm editor Grasshopper is used to interconnect simulation tools. Comparison of electricity supply and demand informs about matching issues. The approach has been tested for a real case study in Yasar University, Turkey. BIPV system could achieve an annual renewable share of 23% under BAU scenario. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  10. [해외논문]   Development of natural fiber-reinforced composite with comparable mechanical properties and reduced energy consumption and environmental impacts for replacing automotive glass-fiber sheet molding compound   SCIE

    Wu, Yingji (Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA ) , Xia, Changlei (Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA ) , Cai, Liping (Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA ) , Garcia, Andres C. (Department of Mechanical Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA ) , Shi, Sheldon Q. (Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA)
    Journal of cleaner production v.184 ,pp. 92 - 100 , 2018 , 0959-6526 ,

    초록

    Abstract To replace glass-fiber sheet molding compound (GF-SMC) using natural fiber-reinforced composites (NFRCs) in the automotive industry, this work intended to enhance mechanical properties and water resistance of NFRCs by impregnating magnesium hydroxide (MH) to kenaf fibers and fabricating composites using the vacuum bag resin transfer molding (VBRTM) technology. The modulus of rupture and tensile strength of modified composites were significantly increased by 73.9% and 54.6% compared with that of the regular NFRCs, respectively. Based on the scanning electron microscope observation, it was found that the MH impregnation significantly enhanced the compatibility of kenaf fibers and polymer matrix, benefiting to the mechanical-property improvements of the composites. Compared to the regular NFRC, the 24-h water absorption and thickness swelling of MH impregnated NFRC (MH-NFRC) were significantly reduced by 83.9% and 84.2%, respectively. When the composite density was factored in the comparison of MH-NFRC and GF-SMC, the specific modulus of rupture and tensile strength of MH-NFRC were 116.4% and 109.0% of the GF-SMC, respectively. Apart from the mechanical properties, the advantages of replacing GF-SMC by MH-NFRC were reflected in the reductions of energy consumption and environmental impacts. It was calculated that the energy consumption of fabricating MH-NFRC was decreased by 33.1% compared with GF-SMC. The comparisons of environmental impacts of MH-NFRC and GF-SMC were performed by life-cycle assessment (LCA) using the SimaPro software. The results demonstrated that the environmental burdens of the composites were reduced by 22.8%, when kenaf fibers were used. All major indices of environmental impacts of MH-NFRC, including the total Global warming, Acidification, Human Health (HH) cancer, HH noncancer, HH criteria air pollutants, Eutrophication, Ecotoxicity, Smog, Natural resource depletion, Habitat alteration, Water intake and Ozone depletion, were reduced by 13.66–51.91%, respectively. It was concluded that the newly developed NFRC had great potential for replacing the GF-SMC in automobile applications, with reduced energy consumption and environmental impacts. Highlights Composites were fabricated using Mg(OH) 2 impregnated kenaf fibers and polyester. Dramatically enhanced mechanical properties using Mg(OH) 2 -impregnated fibers. Comparable properties with automotive glass-fiber sheet molding compound (GF-SMC). Energy consumption was decreased by 33.1% compared with GF-SMC. Environmental impact was reduced by 22.8% from life-cycle assessment. Graphical abstract [DISPLAY OMISSION]

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