Comparative life cycle assessment of biodiesel from algae and jatropha: A case study of India

Ajayebi, Atta; Gnansounou, Edgard; Raman, Jegannathan Kenthorai

doi:10.1016/j.biortech.2013.09.118

Cited by 68 publications

(19 citation statements)

References 27 publications

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“…Various indicators have been used in LCA studies to quantify energy use in the life cycle of biofuels, including fossil energy consumption, primary, secondary or cumulative energy demand and net energy ratio [218]. However, many focused on fossil energy consumption, given that [17][18][19]40,47,48,54,55,57,58,60,68,76,77,80,85,89,92,93,95,96,98,108,[113][114][115]120,121,129,132,133,136,138,139,143,144,147,[152][153][154]156,159,161,162,[164][165][166][167]…”

Section: (B) Energy Usementioning

confidence: 99%

Environmental sustainability of biofuels: a review

2020

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Biofuels are being promoted as a low-carbon alternative to fossil fuels as they could help to reduce greenhouse gas (GHG) emissions and the related climate change impact from transport. However, there are also concerns that their wider deployment could lead to unintended environmental consequences. Numerous life cycle assessment (LCA) studies have considered the climate change and other environmental impacts of biofuels. However, their findings are often conflicting, with a wide variation in the estimates. Thus, the aim of this paper is to review and analyse the latest available evidence to provide a greater clarity and understanding of the environmental impacts of different liquid biofuels. It is evident from the review that the outcomes of LCA studies are highly situational and dependent on many factors, including the type of feedstock, production routes, data variations and methodological choices. Despite this, the existing evidence suggests that, if no land-use change (LUC) is involved, first-generation biofuels can—on average—have lower GHG emissions than fossil fuels, but the reductions for most feedstocks are insufficient to meet the GHG savings required by the EU Renewable Energy Directive (RED). However, second-generation biofuels have, in general, a greater potential to reduce the emissions, provided there is no LUC. Third-generation biofuels do not represent a feasible option at present state of development as their GHG emissions are higher than those from fossil fuels. As also discussed in the paper, several studies show that reductions in GHG emissions from biofuels are achieved at the expense of other impacts, such as acidification, eutrophication, water footprint and biodiversity loss. The paper also investigates the key methodological aspects and sources of uncertainty in the LCA of biofuels and provides recommendations to address these issues.

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Section: (B) Energy Usementioning

confidence: 99%

Environmental sustainability of biofuels: a review

2020

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“…The LCA approach has proven a valuable method in understanding the environmental impacts generated by various industrial products during their production, and is now the foremost accepted methodology for the assessment of environmental impacts (e.g., eutrophication, soil erosion, water run-off, loss of natural biota, and land resources) related to the introduction of new-technology fuels (Singh and Olsen, 2012; Ajayebi et al, 2013). …”

Section: The Use Of “Natural Photosynthesis” In Solar-energy-convertimentioning

confidence: 99%

Photosynthesis at the forefront of a sustainable life

et al. 2014

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The development of a sustainable bio-based economy has drawn much attention in recent years, and research to find smart solutions to the many inherent challenges has intensified. In nature, perhaps the best example of an authentic sustainable system is oxygenic photosynthesis. The biochemistry of this intricate process is empowered by solar radiation influx and performed by hierarchically organized complexes composed by photoreceptors, inorganic catalysts, and enzymes which define specific niches for optimizing light-to-energy conversion. The success of this process relies on its capability to exploit the almost inexhaustible reservoirs of sunlight, water, and carbon dioxide to transform photonic energy into chemical energy such as stored in adenosine triphosphate. Oxygenic photosynthesis is responsible for most of the oxygen, fossil fuels, and biomass on our planet. So, even after a few billion years of evolution, this process unceasingly supports life on earth, and probably soon also in outer-space, and inspires the development of enabling technologies for a sustainable global economy and ecosystem. The following review covers some of the major milestones reached in photosynthesis research, each reflecting lasting routes of innovation in agriculture, environmental protection, and clean energy production.

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“…The slow progress of India for biodiesel production is addressed in literature with a majority of them suggesting the unavailability of Jatropha seeds, less oil yield, less utilization of wasteland for cultivation, and higher gestation period of crops with long payback period . The feedstock for biodiesel shows a large compositional variation and can be broadly categorized into three types, namely, oil from vegetables, waste frying oils, and animal fats.…”

Section: Introductionmentioning

confidence: 99%

A review on separation and purification techniques for biodiesel production with special emphasis on Jatropha oil as a feedstock

Suthar

Dwivedi

Joshipura

2019

Asia-Pacific J Chem Eng

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Biodiesel is a promising alternative to conventional fuels. Research on biodiesel has vast experimental findings, but the outcomes are not always unidirectional.The sequence of unit operation for various transesterification processes is studied. The review work emphasizes on the separation and purification of Jatropha-derived biodiesel. The study on the downstream processes of alcohol recovery, glycerol-rich and biodiesel-rich phase separation, and biodiesel purification techniques is the main part of this paper. The biodiesel purification includes wet and dry washing and membrane techniques. The purpose of the review is to find separation techniques that are less energy-intensive and environmentally friendly purification processes for biodiesel production from Jatropha. The strategies to reduce the cost of biodiesel production from Jatropha are discussed. The Jatropha biodiesel possesses huge potential as one of the alternative energy sources for commercial exploitation in India.

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Comparative life cycle assessment of biodiesel from algae and jatropha: A case study of India

Cited by 68 publications

References 27 publications

Environmental sustainability of biofuels: a review

Environmental sustainability of biofuels: a review

Photosynthesis at the forefront of a sustainable life

A review on separation and purification techniques for biodiesel production with special emphasis on Jatropha oil as a feedstock

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