Two-stage steam gasification of waste biomass in fluidized bed at low temperature: Parametric investigations and performance optimization

Xiao, Xianbin; Meng, Xiuxia; Le, Duc Dung; Takarada, Takayuki

doi:10.1016/j.biortech.2010.09.016

Cited by 140 publications

(61 citation statements)

References 24 publications

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“…Similarly the H2 yield shown in Table 2, increased from 22.31 mmoles g -1 of rice husk for 2 ml h -1 steam flow rate to 27.86 mmoles g -1 of rice husk for 10 ml h -1 steam flow rate. Similar trends were reported by Xiao et al [35,36].…”

Section: Influence Of Steam Flow Rate On Gas Composition and Hydrogensupporting

confidence: 91%

“…From these results, it is evident that the gas yield in relation to biomass (corrected for no input water) slightly increased from 61.61 wt.% for 2 ml h -1 to 64.23 wt.% for 10 ml h -1 steam flow rate. Xiao et al [35] also reported an increase in gas yield with the increase in stream to carbon ratio during the two-stage gasification/reforming of wood chips and pig compost in a fluidized bed reactor. A decrease in tar contents with the increase in steam to feedstock ratio was reported by Xiao et al [36].…”

Section: Characterization Of Reacted Catalystsmentioning

confidence: 95%

“…Higher gas yield with the increase in steam flow rate was obtained because the higher steam flow rates promote steam reforming of tar and other hydrocarbons from the pyrolysis of the rice husk biomass leading to the higher gas yield [35,38]. The water gas reaction is also suggested to have played a role in enhancing the gas yield.…”

Section: Characterization Of Reacted Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

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.

show abstract

Section: Influence Of Steam Flow Rate On Gas Composition and Hydrogensupporting

confidence: 91%

Section: Characterization Of Reacted Catalystsmentioning

confidence: 95%

Section: Characterization Of Reacted Catalystsmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Of the thermo-chemical conversions, gasification converts biomass into combustible gases, such as H 2 , CO and CH 4 , which can be used as fuels in boilers and internal combustion engine or turbines to produce electricity (Ahrenfeldt et al, 2006). Therefore, research and development activities on biomass gasification have been widely and intensively conducted using various types of gasifier (Li et al, 2004;Corella et al, 2007;Acharya et al, 2009;Kitzler et al, 2011;Xiao et al, 2011). During gasification, however, the undesirable formation of tar takes place, which can cause blocking of the pipes within the process.…”

Section: Introductionmentioning

confidence: 98%

Influence of operation conditions and additives on the development of producer gas and tar reduction in air gasification of construction woody wastes using a two-stage gasifier

Mun¹,

Kim²,

Kim³

et al. 2011

Bioresource Technology

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“…Biomass gasification has been investigated with single [21] or two-stage reaction systems [1,4,5,7,51]. Under the single stage reaction system, the samples and catalysts were mixed and the pyrolysis and gasification processes were operated under the same conditions, resulting in difficulty in the separation of catalysts and biomass residues after reaction [21].…”

Section: Introductionmentioning

confidence: 99%

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

Dong

Ling

et al. 2017

Fuel

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Hydrogen production from the thermochemical conversion of biomass was carried out with nano-sized NiZnAlOx catalysts using a two-stage fixed bed reactor system. The gases derived from the pyrolysis of wood sawdust in the first stage were catalytically steam reformed in the second stage. The NiZnAlOx catalysts were synthesized by a co-precipitation method with different Ni molar fractions (5, 10, 15, 25 and 35%) and a constant Zn:Al molar ratio of 1:4. The catalysts were characterized by a wide range of techniques, including N2 adsorption, SEM, XRD, TEM and temperature-programmed oxidation (TPO) and reduction (TPR). Fine metal particles of size around 10-11 nm were obtained and the catalysts had high stability characteristics, which improved the dispersion of active centers during the reaction and promoted the performance of the catalysts. The yield of gas was increased from 49.3 to 74.8 wt.%, and the volumetric concentration of hydrogen was increased from 34.7 to 48.1 vol.%, when the amount of Ni loading was increased from 5 to 35%. Meanwhile, the CH4 fraction decreased from 10.2 to 0.2 vol.% and the C2-C4 fraction was reduced from 2.4 vol.% to 0.0 vol.%. During the reaction, the crystal size of all catalysts was successfully maintained at around 10-11 nm with lowered catalyst coke formation, (particularly for the 35NiZn4Al catalyst where negligible coke was found) and additionally no obvious catalyst sintering was detected. The efficient production of hydrogen from the thermochemical conversion of renewable biomass indicates that it is a promising sustainable route to generate hydrogen from biomass using the NiZnAl metal oxide catalyst prepared in this work via a two-stage reaction system.

show abstract

Two-stage steam gasification of waste biomass in fluidized bed at low temperature: Parametric investigations and performance optimization

Cited by 140 publications

References 24 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

Influence of operation conditions and additives on the development of producer gas and tar reduction in air gasification of construction woody wastes using a two-stage gasifier

Promoting hydrogen production and minimizing catalyst deactivation from the pyrolysis-catalytic steam reforming of biomass on nanosized NiZnAlOx catalysts

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