Comprehensive assessment of 2G bioethanol production

Sharma, Bhawna; Larroche, Christian; Dussap, Claude-Gilles

doi:10.1016/j.biortech.2020.123630

Cited by 212 publications

(108 citation statements)

References 100 publications

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“…Over the last decade, economic and environmental concerns have spurred increased interest in the use of crop residues as a renewable source of energy (Barros et al., 2020; Sharma et al., 2020). Although many crops are good candidates for biofuels (Battaglia, Fike, et al., 2019; Kumar, Lai, Battaglia, et al., 2019; Kumar, Lai, Kumar, et al., 2019; Von Cossel et al., 2019), residues from corn and wheat have received the greatest attention because of low cost and high availability (Battaglia et al., 2017; Battaglia, Groo, et al., 2018; U.S. Department of Energy, 2011).…”

Section: Introductionmentioning

confidence: 99%

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

et al. 2020

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Biofuel production from crop residues is widely recognized as an essential component of developing a bioeconomy, but the removal of crop residues still raises many questions about the sustainability of the cropping system. Therefore, this study reviews the sustainability effects of crop residues removal for biofuel production in terms of crop production, soil health and greenhouse gas emissions. Most studies found little evidence that residue management had long-term impacts on grain yield unless the available water is limited. In years when water was not limiting, corn and wheat removal rates ≥90% produced similar or greater grain yield than no removal in most studies. Conversely, when water was limiting, corn grain yield decreased up to 21% with stover removal ≥90% in some studies. Changes in soil organic fractions and nutrients depended largely on the amount of residue returned, soil depth and texture, slope and tillage. Reductions in organic fractions occurred primarily with complete stover removal, in the top 15-30 cm in fine-textured soils. Soil erosion, water runoff and leaching of nutrients such as total nitrogen (N) and extractable soil potassium decreased when no more than 30% of crop residues were removed. Stover management effects on soil bulk density varied considerably depending on soil layer, and residue and tillage management, with removal rates of less than 50% helping to maintain the soil aggregate stability. Reductions in CO 2 and N 2 O fluxes typically occurred following complete residue removal. The use of wheat straw typically increased CH 4 emissions, and above or equal to 8 Mg/ha wheat straw led to the largest CO 2 and N 2 O emissions, regardless of N rates. Before using crop residues for biofuel production, it should therefore always be checked whether neutral to positive sustainability effects can be maintained under the site-specific conditions.

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Section: Introductionmentioning

confidence: 99%

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

et al. 2020

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“…Considering the importance of bioethanol being produced across the world to satisfy the energy demand, it is extremely important to understand the overall process design of bioethanol production. The annual world production of ethanol is over 100 billion liters, which around 70% is produced by fermentation [48]. This fermentation process is performed in different kinds and by diverse microbes (mainly yeasts due to their high ethanol yields and high tolerance limits).…”

Section: Ethanol Productionmentioning

confidence: 99%

The “Zero Miles Product” Concept Applied to Biofuel Production: A Case Study

et al. 2021

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To make biofuel production feasible from an economic point of view, several studies have investigated the main associated bottlenecks of the whole production process through approaches such as the “cradle to grave” approach or the Life Cycle Assessment (LCA) analysis, being the main constrains the feedstock collection and transport. Whilst several feedstocks are interesting because of their high sugar content, very few of them are available all year around and moreover do not require high transportation’ costs. This work aims to investigate if the “zero miles” concept could bring advantages to biofuel production by decreasing all the associated transport costs on a locally established production platform. In particular, a specific case study applied to the Technical University of Denmark (DTU) campus is used as example to investigate the advantages and feasibility of using the spent coffee grounds generated at the main cafeteria for the production of bioethanol on site, which can be subsequently used to (partially) cover the campus’ energy demands.

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“…According to Figure 2, stabilization and a possible decline in biodiesel production are expected in the next decade, as stated by the Organisation for Economic Co-operation and Development (OECD). This trend would be a consequence of second and third generation biofuel development and industrial application, with products obtained from non-edible sources [8][9][10][11][12][13]. In any case, future biodiesel production depends on several factors, such as raw material availability, internal policies, markets, etc., in some cases leading to a local production rise against the international trend, becoming a stable crude glycerol source [13].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Glycerol Catalytic Valorization: A Review

et al. 2020

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Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.

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Comprehensive assessment of 2G bioethanol production

Cited by 212 publications

References 100 publications

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

The “Zero Miles Product” Concept Applied to Biofuel Production: A Case Study

Recent Advances in Glycerol Catalytic Valorization: A Review

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