High-temperature entrained flow gasification of biomass

Qin, Ke; Lin, Weigang; Jensen, Peter Arendt; Jensen, Anker Degn

doi:10.1016/j.fuel.2011.10.063

Cited by 145 publications

(96 citation statements)

References 35 publications

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“…Decarboxylation, depolymerization and thermal cracking reactions are also favoured with the increase in temperature [22]. The slight decrease in gas yield at the highest studied temperature of 1050 °C was most likely due to the series of complex repolymerization and condensation reactions favourable at temperature above 1000 °C [8,23]. These condensation and repolymerization reactions lead to the formation of soot as a significant amount of soot was observed in the system during the 1050 °C experiment.…”

Section: Resultsmentioning

confidence: 93%

Pyrolysis/reforming of rice husks with a Ni–dolomite catalyst: Influence of process conditions on syngas and hydrogen yield

Waheed

2016

Journal of the Energy Institute

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The influence of process conditions on the production of syngas and H2 from biomass in the form of rice husks was investigated using a two-stage pyrolysis-catalytic reforming reactor.The parameters investigated were, reforming temperature, steam flow rate and biomass particle size and the catalyst used was a 10 wt.% Ni-dolomite catalyst. Biomass was pyrolysed in the first stage, and the product volatiles were reformed in the second stage in the presence of steam and the Ni-dolomite catalyst. Increase in catalyst temperature from 850 °C to 1050 °C marginally improved total syngas yield. However, H2 yield was increased from 20.03 mmoles g -1 at 850 °C to 30.62 mmoles g -1 at 1050 °C and H2 concentration in the product gas increased from 53.95 vol.% to 65.18 vol.%. Raising the steam flow rate increased the H2 yield and H2 gas concentration. A significant increase in H2:CO ratio along with a decrease in CO:CO2 ratio suggested a change in the equilibrium of the water gas shift reaction towards H2 formation with increased steam flow rate. The influence of particle size on H2 yield was small showing an increase in H2 production when the particle size was reduced from 2.8 -3.3 to 0.2 -0.5 mm.

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Section: Resultsmentioning

confidence: 93%

Pyrolysis/reforming of rice husks with a Ni–dolomite catalyst: Influence of process conditions on syngas and hydrogen yield

Waheed

2016

Journal of the Energy Institute

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“…Because of prevailing higher temperatures inside the reactor residence time for the fuel particle is low, leading to very short time taken for the production of the producer gas with the initial time being taken as the time of fuel feeding. Since very short residence time will be available for the fuel particles, amount of oxidizing agent supplied is more for entrained flow gasifiers compared to other type of gasifiers [4].…”

Section: Entrained Flow Gasifiersmentioning

confidence: 99%

A Review on Co-Gasification of Biomass and Coal

Hiremath¹

2017

IJERT

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Abstract-Gasification is an indirect combustion process of converting solid fuels into combustible gas. Various types of gasifiers have been developed based on the requirements such as fuel flexibility, tar percent of out-coming gas, maximum temperature in reactor etc. Biomass gasification is a much understood technology at its present level. Adding the coal to biomass helps in usage of coal in more environmental friendly and clean way. Present work reviews on co-gasification of biomass and coal in fixed and fluidised bed gasifiers in order to study synergy between both biomass and coal. This work also sheds some light on the single particle experimental work conducted on biomass and coal. It has been found that the increase in the coal percent in the fuel blend on weight basis led to the decrease in the synergy of the co-gasification of biomass and coal because of ash fusion problem.

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“…The yields of different gases were calculated with N2 as a tracer, according to the data obtained from gas chromatography (Qin et al 2012). …”

Section: Experimental Devices and Proceduresmentioning

confidence: 99%

Experimental Study on the Gasification Characteristics of Biomass with CO2/Air in an Entrained-flow Gasifier

Yu¹,

Chen²,

Xu³

et al. 2016

BioResources

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This study explored the gasification characteristics of pine sawdust and rice straw with CO2/air in a bench-scale entrained-flow gasifier. The effects of various gasification parameters, i.e., CO2/C, temperature, and biomass type, on the syngas composition, gasification index, and tar yield were investigated. When compared to air gasification, the CO2/air agent for gasification improved the yield of CO, and it decreased the tar yield and the yield of CO2 produced from biomass. The cold gas efficiency (CGE) of pine sawdust reached 87.06% at the CO2/C equivalence ratio of 0.25, whereas that of rice straw reached 73.35% at the CO2/C equivalence ratio of 0.50. When compared with air gasification, the CO2/air gasification increased the CGE of pine sawdust and rice straw by 4.20% and 9.17%, respectively. However, excessive CO2 was unfavorable to the gasification process. As the temperature increased, the yields of CO and H2 increased, and the tar yield decreased, thus improving the syngas quality. This study indicated that the addition of the proper level of CO2 for gasification improved the overall gasification efficiency. Moreover, the improvement for rice straw (herbaceous plant) was more noteworthy than for pine sawdust (woody plant).

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High-temperature entrained flow gasification of biomass

Cited by 145 publications

References 35 publications

Pyrolysis/reforming of rice husks with a Ni–dolomite catalyst: Influence of process conditions on syngas and hydrogen yield

Pyrolysis/reforming of rice husks with a Ni–dolomite catalyst: Influence of process conditions on syngas and hydrogen yield

A Review on Co-Gasification of Biomass and Coal

Experimental Study on the Gasification Characteristics of Biomass with CO2/Air in an Entrained-flow Gasifier

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