Contemporary issues in thermal gasification of biomass and its application to electricity and fuel production

Wang, Lijun; Weller, Curtis L.; Jones, David D.; Hanna, Milford A.

doi:10.1016/j.biombioe.2007.12.007

Cited by 441 publications

(203 citation statements)

References 86 publications

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“…Gasification system (GAS) converts biomass through partial oxidation into a gaseous mixture of syngas/product [18]. The producer gas (PG) is of low caloric value containing about 4-6 MJ/kg compared to natural gas having 35-50 MJ/kg due to a high nitrogen presence in excess of 50%.…”

Section: Biomass Energy Conversion Systemsmentioning

confidence: 99%

A Techno-Economic Comparison of Biomass Thermo-Chemical Systems for Sustainable Electricity in Nigerian Rural Areas

Garba¹,

Kishk²

2016

5th IET International Conference on Renewable Power Generation (RPG) 2016

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Section: Biomass Energy Conversion Systemsmentioning

confidence: 99%

A Techno-Economic Comparison of Biomass Thermo-Chemical Systems for Sustainable Electricity in Nigerian Rural Areas

Garba¹,

Kishk²

2016

5th IET International Conference on Renewable Power Generation (RPG) 2016

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“…Because of several advantages, especially fuel flexibility in terms of properties and sizes and the high heat and mass transfer [16], the bubbling fluidized bed gasifier is considered suitable for co-gasification and was chosen for the study. Experiments were carried out in the 100 kWth bubbling fluidized bed gasifier using air as a gasifying agent.…”

Section: B Experimental Facilities and Proceduresmentioning

confidence: 99%

Utilization of Plastic Waste to Solve the Problem in High-Moisture Biomass Gasification

Chobthiangtham¹,

Fukuda²

2015

IJESD

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Abstract-With an increased interest in energy production from biomass through gasification, the properties of biomass that influenced gasification performance have been investigated. One of important properties is the moisture content. Generally, the excessive moisture in biomass is reduced to meet the acceptable level for gasification by an additional pretreatment process which always costs extra investment. One possible alternative is the co-processing of high-moisture biomass fuels with other low-moisture fuels. In this study, the utilization of plastic waste to solve the problem of high-moisture biomass gasification was investigated by mixing the high-moisture rubber woodchip (27%M.C.) with plastic waste at various mixing ratios. The results showed a significant improvement of gasification performance. Even at 10% mixing ratio, the higher heating value of the product gas increased by about 50% and 25% compared to the case of high-moisture rubber woodchip (27%M.C.) and pre-dried rubber woodchip (8.5%M.C.), respectively. Compared to mixing with rubber waste at the same weight ratio, the plastic waste addition was found to give a better gasification improvement largely due to the higher carbon and hydrogen content in plastic waste. The findings from this study have shown not only that the high-moisture biomass can be used without pretreatment needed, but also an effective solution to plastic waste disposal.

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“…figure) shows a simplified configuration scheme of such a biofuel production process. This type of production generally consists of several steps: pretreatment, (by chipping or drying), thermo-chemical gasification into synthetic natural gas (SNG), purification and upgrading of SNG, and biofuel synthesis (Balat et al, 2009;Wang et al, 2008a;Wang et al, 2008b). The process is exothermic, which opens up a possibility for using the excess heat for DH or combined heat and power (CHP) production.…”

Section: Technology Cases Included In the Studymentioning

confidence: 99%

Integration of biofuel production into district heating – part I: an evaluation of biofuel production costs using four types of biofuel production plants as case studies

Ilić

Dotzauer

Trygg

et al. 2014

Journal of Cleaner Production

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This paper evaluates the effects on profitability of biofuel production if biofuel producers would sell the waste heat from the production to a local district heating system. All analyses have been performed considering four different technology cases for biofuel production. Two technology cases include ethanol production which is followed by by-production of raw biogas.This biogas can be upgraded and sold as biofuel (the first technology case) or directly used for combined heat and power production (the second technology case 2 market scenarios were considered. The sensitivity analyses of the discount rate were performed as well.In the case of energy market conditions, the profitability depends above all on the price ratio between biomass (used as the feedstock for biofuel production) and crude oil (used as the feedstock for fossil diesel and gasoline production). The reason for this is that the gate biofuel prices (the prices on which the biofuel would be sold) were calculated assuming that the final prices at the filling stations are the same as the prices of the replaced fossil fuel. The price ratios between biomass and district heating, and between biomass and electricity, also have an influence on the profitability, since higher district heating and electricity prices lead to higher revenues from the heat/electricity by-produced.Due to high biofuel (ethanol + biogas) efficiency, the ethanol production plant which produces upgraded biogas has the lowest biofuel production costs. Those costs would be lower than the biofuel gate prices even if the support for transportation fuel produced from renewable energy sources were not included. If the raw biogas that is by-produced would instead be used directly for combined heat and power production, the revenues from the electricity and heat would increase, but at the same time the biofuel efficiency would be lower, which would lead to higher production costs. On the other hand, due to the fact that it has the highest heat efficiency compared to the other technologies, the ethanol production in this plant shows a high sensitivity to the district heating price level, and the economic benefit from introducing such a plant into a district heating system is most obvious. Assuming a low discount rate (6 %), the introduction of such a plant into a district heating system would lead to between 28 % and 52 % (depending on the district heating price level and energy market scenario) lower biofuel production costs. Due to the lower revenues from the heat and electricity co-produced, and higher capital investments compared to the ethanol production 3 plants, Fischer-Tropsch diesel and dimethyl ether productions are shown to be profitable only if high support for transportation fuel produced from renewable energy sources is included.The results also show that an increase of the discount rate from 6 % to 10 % does not have a significant influence on the biofuel production costs. Depending on the biofuel production plant, and on the energy market and district heating cond...

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Contemporary issues in thermal gasification of biomass and its application to electricity and fuel production

Cited by 441 publications

References 86 publications

A Techno-Economic Comparison of Biomass Thermo-Chemical Systems for Sustainable Electricity in Nigerian Rural Areas

A Techno-Economic Comparison of Biomass Thermo-Chemical Systems for Sustainable Electricity in Nigerian Rural Areas

Utilization of Plastic Waste to Solve the Problem in High-Moisture Biomass Gasification

Integration of biofuel production into district heating – part I: an evaluation of biofuel production costs using four types of biofuel production plants as case studies

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