Energy efficiency of ethanol production from cellulosic feedstock

Bansal, Ankit; Illukpitiya, Prabodh; Tegegne, Fisseha; Singh, Surendra

doi:10.1016/j.rser.2015.12.122

Cited by 34 publications

(17 citation statements)

References 25 publications

(22 reference statements)

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“…Furthermore, cellulose is hydrolyzed into small molecular compounds such as glucose through appropriate cellulase or acid catalysts, further processing it into different value-added products ( Figure 5). For example, industrial ethanol and butanol produced by different fermentation processes [40]. Levulinic acid was prepared under high temperature, high pressure, and catalyst [41].…”

Section: Extraction and Transformation Of Lignin And Cellulose In Frmentioning

confidence: 99%

A Review on the Transformation of Furfural Residue for Value-Added Products

et al. 2019

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As a by-product of lignocellulosic depolymerization for furfural production, furfural residue (FR) is composed of residual cellulose, lignin, humic acid, and other small amounts of materials, which have high reuse value. However, due to the limitation of furfural production scale and production technology, the treatment of FR has many problems such as high yield, concentrated stacking, strong acidity, and difficult degradation. This leads to the limited treatment methods and high treatment cost of furfural residue. At present, most of the furfural enterprises can only be piled up at will, buried in soil, or directly burned. The air, soil, and rivers are polluted and the ecological balance is destroyed. Therefore, how to deal with furfural residue reasonably needs to be solved. In this review, value-added products for furfural residue conversion are described in detail in the fields of soil culture, catalytic hydrolysis, thermal decomposition, and porous adsorption. The future studies reporting the FR to convert value-added products could find guidance from this review to achieve specific goals.

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Section: Extraction and Transformation Of Lignin And Cellulose In Frmentioning

confidence: 99%

A Review on the Transformation of Furfural Residue for Value-Added Products

et al. 2019

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“…Recently, switchgrass has attracted significant attention for bioethanol production because of its high yield potential on marginal lands [22] along with low establishment and production costs [23]. It has been accepted to have a high energy efficiency for ethanol production in numerous studies [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Switchgrass-Based Bioethanol Productivity and Potential Environmental Impact from Marginal Lands in China

Zhang

Lin

et al. 2017

Energies

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Switchgrass displays an excellent potential to serve as a non-food bioenergy feedstock for bioethanol production in China due to its high potential yield on marginal lands. However, few studies have been conducted on the spatial distribution of switchgrass-based bioethanol production potential in China. This study created a land surface process model (Environmental Policy Integrated Climate GIS (Geographic Information System)-based (GEPIC) model) coupled with a life cycle analysis (LCA) to explore the spatial distribution of potential bioethanol production and present a comprehensive analysis of energy efficiency and environmental impacts throughout its whole life cycle. It provides a new approach to study the bioethanol productivity and potential environmental impact from marginal lands based on the high spatial resolution GIS data, and this applies not only to China, but also to other regions and to other types of energy plant. The results indicate that approximately 59 million ha of marginal land in China are suitable for planting switchgrass, and 22 million tons of ethanol can be produced from this land. Additionally, a potential net energy gain (NEG) of 1.75 × 10 6 million MJ will be achieved if all of the marginal land can be used in China, and Yunnan Province offers the most significant one that accounts for 35% of the total. Finally, this study obtained that the total environmental effect index of switchgrass-based bioethanol is the equivalent of a population of approximately 20,300, and a reduction in the global warming potential (GWP) is the most significant environmental impact.

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“…Plant aboveground biomass in the Zhoushan CW ranged from 565 kg ha −1 year −1 to 90,000 DW kg ha −1 year −1 ( Table 1 ). The estimated peak aboveground biomass yield of the CWs in our experiment field in the southeast region of China is as high as ~90,000 DW kg ha −1 year −1 , which reached a higher line to previous biofuel feedstocks’ potential productivity ( Table 1 ) and is similar to Napier grass ( Pennisetum purpureum ), which is 88,000 kg ha −1 year −1 in the USA, and slightly lower than 100,000 kg ha −1 year −1 for natural stands of Echinochloa polystachya on the Amazon floodplain, which is almost the highest level of biomass production of biofuel feedstock [ 23 ].…”

Section: Resultsmentioning

confidence: 71%

Environmental, Ecological, and Economic Benefits of Biofuel Production Using a Constructed Wetland: A Case Study in China

Liu

Zou

2019

IJERPH

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Here we show a constructed wetland (CW), a viable alternative wastewater treatment system, be used to produce biofuels from biomass by using nitrogen contained in domestic wastewater. We summarize the potential biomass yield evaluated as cellulosic ethanol bioenergy production, and combine the life cycle analysis with a mass balance approach to estimate the energetic, environmental, and economic performance of a CW biofuel system. The results showed that the annual aboveground biomass yield of a CW in Zhoushan, Zhejiang Province, China, averaged 37,813 kg ha−1 year−1 as the by-product of treating waste N, which is about one order of magnitude larger than traditional biofuel production systems. The biomass yield in the Zhoushan CW system had life cycle environment benefits of 8.8 Mg (1 Mg = 106 g) CO2 equivalent ha−1 year−1 of greenhouse gas emission reduction. The CW in Zhoushan had a net energy gain of 249.9 GJ (1 GJ = 109 J) ha−1 year−1 while the wastewater treatment plant (WTP) consumes 7442.5 GJ ha−1 year−1. Moreover, the CW reduced greenhouse gas emissions to 2714 times less than that of the WTP. The CW also provided various ecosystem services, such as regional climate regulation and habitat conservation. We suggest that the potential use of a CW as biofuel production and carbon sequestration via nitrogen-negative input can be explored more widely in the future.

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Energy efficiency of ethanol production from cellulosic feedstock

Cited by 34 publications

References 25 publications

A Review on the Transformation of Furfural Residue for Value-Added Products

A Review on the Transformation of Furfural Residue for Value-Added Products

Switchgrass-Based Bioethanol Productivity and Potential Environmental Impact from Marginal Lands in China

Environmental, Ecological, and Economic Benefits of Biofuel Production Using a Constructed Wetland: A Case Study in China

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