A techno-economic review of thermochemical cellulosic biofuel pathways

Brown, Tristan R.

doi:10.1016/j.biortech.2014.09.053

Cited by 142 publications

(91 citation statements)

References 59 publications

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“…The complex structure of lignocellulosic biomass, with physical and chemical barriers, hinders second-generation ethanol production, which has not yet been commercialized (Galbe and Zacchi 2012;Buruiana et al 2014;Brown 2015). Pretreatment plays an essential role in the biochemical processes of bioethanol (Carvalheiro et al 2008;Chiaramonti et al 2012;Leitner and Lindofer 2016) and is considered the most expensive stage (Chiaramonti et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

et al. 2017

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Olive tree biomass (OTB) represents an interesting feedstock for bioethanol production. In this study, olive tree pruning was water extracted and pretreated by dilute sulfuric acid to achieve high sugar recoveries from cellulosic and hemicellulosic fractions. Temperature (160 to 200 °C), acid concentration (0 to 8 g acid/100 g extracted raw material), and solids loading (15% to 35% w/v) were selected as operation variables and modified according to a Box-Behnken experimental design. The optimal conditions for the acid pretreatment were 160 °C, 4.9 g sulfuric acid/100 g biomass, and 35% solids loading (w/v), according to multiple criteria that considered the maximization of both the hemicellulosic sugars concentration in prehydrolysate and the overall sugar yield. These optimized conditions yielded a sugar concentration of 79.8 g/L, corresponding to an overall yield of 39.8 g total sugars/100 g extracted OTB. The fermentability of hemicellulosic sugars prehydrolysates from the acid pretreatment was evaluated by Escherichia coli after a detoxification stage by overliming. The prehydrolysates with lower concentrations of toxic compounds were fermented and achieved ethanol yields higher than 80% of the theoretical ethanol yield.

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Section: Introductionmentioning

confidence: 99%

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

et al. 2017

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“…For instance, FT syncrude production is technology dominated, whereas the vegetable-oil-based biofuel production is significantly influenced by feedstock cost (Parajuli et al, 2015). Several examples of techno-economic performance assessments for biofuel generation are available in the literature (Brown, 2015). However, comparison of the results is challenging because different approaches have been implemented by different research works.…”

Section: Techno-economic Assessment (Tea)mentioning

confidence: 99%

“…This intermediate product is known as syngas and can be converted into heat and power via combustion, or be catalytically-upgraded to liquid fuels such as ethanol, methanol, gasoline, diesel, jet fuels, etc. (Brown, 2015;Farzad et al, 2016).…”

Section: Biofuels From Thermochemical Pathwaymentioning

confidence: 99%

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Recent trends on techno-economic assessment (TEA) of sugarcane biorefineries

2017

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“…However, few studies were found on TEA for ethanol production through the hybrid gasification-syngas fermentation (GF) process [117,120]. TEAs of various thermochemical technologies for cellulosic biofuels have been recently reviewed [121].…”

Section: Techno-economic Analysismentioning

confidence: 99%

Syngas Fermentation: A Microbial Conversion Process of Gaseous Substrates to Various Products

2017

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Biomass and other carbonaceous materials can be gasified to produce syngas with high concentrations of CO and H 2 . Feedstock materials include wood, dedicated energy crops, grain wastes, manufacturing or municipal wastes, natural gas, petroleum and chemical wastes, lignin, coal and tires. Syngas fermentation converts CO and H 2 to alcohols and organic acids and uses concepts applicable in fermentation of gas phase substrates. The growth of chemoautotrophic microbes produces a wide range of chemicals from the enzyme platform of native organisms. In this review paper, the Wood-Ljungdahl biochemical pathway used by chemoautotrophs is described including balanced reactions, reaction sites physically located within the cell and cell mechanisms for energy conservation that govern production. Important concepts discussed include gas solubility, mass transfer, thermodynamics of enzyme-catalyzed reactions, electrochemistry and cellular electron carriers and fermentation kinetics. Potential applications of these concepts include acid and alcohol production, hydrogen generation and conversion of methane to liquids or hydrogen.

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A techno-economic review of thermochemical cellulosic biofuel pathways

Cited by 142 publications

References 59 publications

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

Recent trends on techno-economic assessment (TEA) of sugarcane biorefineries

Syngas Fermentation: A Microbial Conversion Process of Gaseous Substrates to Various Products

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