Methanol or ethanol produced from woody biomass: Which is more advantageous?

Hasegawa, Fumio; Yokoyama, Shoko; Imou, Kenji

doi:10.1016/j.biortech.2009.05.008

Cited by 49 publications

(29 citation statements)

References 14 publications

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“…However, there are several other potential biofuels which could be produced from woody biomass. Hasegawa et al (2010) compared biomethanol and bioethanol and concluded that, from a short-term perspective, bioethanol would reduce CO 2 emissions more, while from a long-term perspective biomethanol had greater potential for CO 2 mitigation.…”

Section: δComentioning

confidence: 99%

Effects on global CO2 emissions when substituting LPG with bio-SNG as fuel in steel industry reheating furnaces—the impact of different perspectives on CO2 assessment

Johansson

2016

Energy Efficiency

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The iron and steel industry is the second largest user of energy in the world industrial sector and is currently highly dependent on fossil fuels and electricity. Substituting fossil fuels with renewable energy in the iron and steel industry would make an important contribution to the efforts to reduce emissions of CO 2 . However, different approaches to assessing CO 2 emissions from biomass and electricity use generate different results when evaluating how fuel substitution would affect global CO 2 emissions. This study analyses the effects on global CO 2 emissions when substituting liquefied petroleum gas with synthetic natural gas, produced through gasification of wood fuel, as a fuel in reheating furnaces at a scrap-based steel plant. The study shows that the choice of system perspective has a large impact on the results. When wood fuel is considered available for all potential users, a fuel switch would result in reduced global CO 2 emissions. However, applying a perspective where wood fuel is seen as a limited resource and alternative use of wood fuel is considered, a fuel switch could in some cases result in increased global CO 2 emissions. As an example, in one of the scenarios studied, a fuel switch would reduce global CO 2 emissions by 52 ktonnes/year if wood fuel is considered available for all potential users, while seeing wood fuel as a limited resource implies, in the same scenario, increased CO 2 emissions by 70 ktonnes/year. The choice of method for assessing electricity use also affects the results.

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Section: δComentioning

confidence: 99%

Effects on global CO2 emissions when substituting LPG with bio-SNG as fuel in steel industry reheating furnaces—the impact of different perspectives on CO2 assessment

Johansson

2016

Energy Efficiency

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“…6 Bio-ethanol production from lignocellulosic biomass (second generation biofuel) has been greatly improved by new technologies, 7 and the perspectives for implementation in the short term are better than other biofuels (such as bio-methanol). 8 Nevertheless, to achieve the commercialization a number of technological breakthroughs and cost reductions are required, and moreover, it must be combined with the production of many high-value co-products (organic fertilizers and xylooligosaccharides) simultaneously with bio-ethanol. 9 In addition to its use as a fuel, the bio-ethanol can be valorized by catalytic transformation by two main routes: (i) to obtain H 2 by catalytic steam reforming on a bifunctional catalyst, [10][11][12] and (ii) to obtain hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Deactivation kinetics of a HZSM‐5 zeolite catalyst treated with alkali for the transformation of bio‐ethanol into hydrocarbons

et al. 2011

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The kinetics of deactivation by coke of a HZSM-5 zeolite catalyst in the transformation of bioethanol into hydrocarbons has been studied. To attenuate deactivation, the following treatments have been carried out: (i) the zeolite has been subjected to a treatment with alkali to reduce the acid strength of the sites and (ii) it has subsequently been agglomerated into a macro and meso-porous matrix of bentonite and alumina. The experimental study has been conducted in a fixed bed reactor under the following conditions: temperature, between 300 and 400 C; pressure, 1 atm; space-time, up to 1.53 (g of catalyst) h (g of ethanol) À1; particle size of the catalyst, between 0.3 and 0.6 mm; feed flowrate, 0.16 cm 3 min À1 of ethanolþwater and 30 cm 3 (NC) min À1of N 2 ; water content in the feed, up to 75 wt %; time on stream, up to 31 h. The expression for deactivation kinetics is dependent on the concentration of hydrocarbons and water in the reaction medium (which attenuates the deactivation) and, together with the kinetics at zero time on stream, allows the calculation of the evolution with time on stream of the yields and distribution of products (ethylene, propylene and butenes, C 1 -C 3 paraffins, and C 4 -C 12 ). By increasing the temperature in the 300-400 C range the role of ethylene on coke deposition is more significant than that of the other hydrocarbons (propylene, butenes and C 4 -C 12 ), which contribute to a greater extent to the formation of coke at 300 C.

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“…Reaction (1) changes its direction for combinations containing initially even a small quantity of CO. Under these circumstances, carbon dioxide becomes a reactant in reaction (3) and a product in reaction (1). Therefore, the definition of the conversion degree with respect to carbon dioxide would be inconvenient.…”

Section: Methanol Production Analysismentioning

confidence: 98%

“…Carbon dioxide, which is one of the main causes of global warming, is released from the combustion of fossil fuels [1]. As a consequence of the greenhouse gas emissions (GHG), the overall average temperature and sea levels have increased by 0.4 K and 15 cm over the twentieth century, respectively.…”

Section: Introductionmentioning

confidence: 99%

Development and analysis of an integrated photovoltaic system for hydrogen and methanol production

Esmaili

Dinçer

Naterer

2015

International Journal of Hydrogen Energy

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Methanol or ethanol produced from woody biomass: Which is more advantageous?

Cited by 49 publications

References 14 publications

Effects on global CO2 emissions when substituting LPG with bio-SNG as fuel in steel industry reheating furnaces—the impact of different perspectives on CO2 assessment

Effects on global CO2 emissions when substituting LPG with bio-SNG as fuel in steel industry reheating furnaces—the impact of different perspectives on CO2 assessment

Deactivation kinetics of a HZSM‐5 zeolite catalyst treated with alkali for the transformation of bio‐ethanol into hydrocarbons

Development and analysis of an integrated photovoltaic system for hydrogen and methanol production

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