Hydrogen from aqueous fraction of biomass pyrolysis liquids by catalytic steam reforming in fluidized bed

Medrano, J.A.; Oliva, M.; Ruíz, J.; García, L.; Arauzo, J.

doi:10.1016/j.energy.2010.03.059

Cited by 136 publications

(82 citation statements)

References 34 publications

(43 reference statements)

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“…In Table 1 catalyst. Ni-Ca-Al catalyst has been used for the hydrogen production from catalytic steam reforming of biomass pyrolysis liquids [11]; Ca was proposed to lower the H 2 /CO ratio during the experiment. Zn metal has been reported to have good performance related to the improvement of hydrogen production from ethanol steam reforming [12,13].…”

Section: Product Yield and Gas Concentrationsmentioning

confidence: 99%

Catalytic Steam Gasification of Biomass for a Sustainable Hydrogen Future: Influence of Catalyst Composition

Wang

et al. 2013

Waste Biomass Valor

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Hydrogen is regarded as a clean energy for fuelling the future. Hydrogen will be the energy carrier from other resources such as hydropower, wind, solar and biomass. Producing hydrogen from gasification of biomass wastes, particularly in the presence of steam, represents a promising route to produce this clean and CO 2 -neutral fuel. The steam pyrolysisgasification of biomass (wood sawdust) was carried out with various nickel-based catalysts for hydrogen production in a two-stage fixed bed reaction system. The wood sawdust was pyrolysed in the first reactor and the derived products were gasified in the second reactor in the presence of the catalyst and steam. The synthesised Ni-Ca-Al and Ni-Zn-Al catalysts were prepared by co-precipitation method with different Ni loadings of 20 mol.% and various Zn/Al or Ca/Al ratios, which were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM) and temperature-programmed oxidation (TPO). The results showed that the Ni/Zn-Al (1:9) catalyst resulted in higher hydrogen production (23.9 mmol H 2 g -1 biomass) compared with the Ni/Ca-Al (1:9) catalyst (12.7 23.9 mmol H 2 g -1 biomass) and in addition, the increase of Ca or Zn content in the catalyst slightly increased the hydrogen production. The TPO results showed that the catalyst suffered negligible coke deposition from the catalytic steam pyrolysis/gasification of wood sawdust. Additionally, Na 2 CO 3 catalyst preparation agent was also found to produce a catalyst with better performance and lower coke deposition, compared with NH 4 OH catalyst preparation agent, as observed by TPO, SEM and TEM analysis.

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Section: Product Yield and Gas Concentrationsmentioning

confidence: 99%

Catalytic Steam Gasification of Biomass for a Sustainable Hydrogen Future: Influence of Catalyst Composition

Wang

et al. 2013

Waste Biomass Valor

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“…Ni based catalysts meet the challenge of being active and selective towards H 2 , although they are susceptible to deactivation by coking. Therefore, the catalyst was modified with Mg and Co. Mg was added as a support modifier enhancing the water adsorption in order to gasify the coke or its precursors, as well as to provide sufficient strength if the process is to take place in a fluidized bed reactor [30,31]. Co was added as a active phase modifier to enhance the steam reforming and WGS reactions and prevent catalyst deactivation by coking, as a Ni-Co interaction can be formed in the catalyst which reduces the crystallite size [19].…”

Section: Experimental Reforming Studymentioning

confidence: 99%

Analysis and optimisation of H2 production from crude glycerol by steam reforming using a novel two step process

Remón

Jarauta-Córdoba

García

et al. 2016

Fuel Processing Technology

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This work studies the valorisation of biodiesel-derived glycerol to produce a hydrogen rich gas by means of a two-step sequential process. Firstly, the crude glycerol was purified with acetic acid to reduce problematical impurities. The effect of the final pH (5-7) on the neutralisation process was addressed and it was found that a pH of 6 provided the best phase separation and the greatest glycerol purity. Secondly, the refined glycerol was upgraded by catalytic steam reforming and this step was theoretically and experimentally studied. The theoretical study analyses the effect of the temperature (400-700 ºC), glycerol concentration (10-50 wt.%) and N 2 (225-1347 cm 3 STP/min) and liquid flow (0.5-1 mL/min) rates on the thermodynamic composition of the gas. The results show that the temperature and glycerol concentration exerted the greatest influence on the thermodynamics. The experimental study considers the effect of the temperature (400-700 ºC), glycerol concentration (10-50 wt.%) and spatial time (3-17 g catalyst min/ g glycerol) on the product distribution in carbon basis (gas, liquid and solid) and on the composition of the gas and liquid phases. The experiments were planned according to a 2 level 3 factor Box-Wilson Central Composite Face Centred (CCF, :  1) design, which is suitable for studying the influence of each variable as well as all the possible interactions between variables. The results were analysed with an analysis of variance (ANOVA) with 95% confidence, enabling the optimisation of 2 the process. The gas phase was made up of a mixture of H 2 (65-95 vol.%), CO 2 (2-29 vol.%), CO (0-18 vol.%) and CH 4 (0-5 vol.%). Temperatures of 550 ºC and above enabled thermodynamic compositions for the gas to be achieved and helped diminish carbon formation. A possible optimum for H 2 production was found at a temperature of around 680 ºC, feeding a glycerol solution of 37 wt.% and using a spatial time of 3 g catalyst min/g glycerol. These conditions provide a 95% carbon conversion to gas, having the following composition: 67 vol.% H 2 , 22 vol.% CO 2 , 11 vol.% CO and 1 vol.% CH 4 .

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“…Consequently, this is the most realistic option for studying the influence of the chemical composition on the process. Real aqueous fractions obtained from pine, poplar, sawdust and beech wood feedstock have been used in several works [5,[18][19][20][21][22][23]. These works focused on studying operating conditions, developing suitable catalysts and testing different reactors.…”

mentioning

confidence: 99%

Hydrogen production from pine and poplar bio-oils by catalytic steam reforming. Influence of the bio-oil composition on the process

Remón

Broust

Volle

et al. 2015

International Journal of Hydrogen Energy

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Hydrogen from aqueous fraction of biomass pyrolysis liquids by catalytic steam reforming in fluidized bed

Cited by 136 publications

References 34 publications

Catalytic Steam Gasification of Biomass for a Sustainable Hydrogen Future: Influence of Catalyst Composition

Catalytic Steam Gasification of Biomass for a Sustainable Hydrogen Future: Influence of Catalyst Composition

Analysis and optimisation of H2 production from crude glycerol by steam reforming using a novel two step process

Hydrogen production from pine and poplar bio-oils by catalytic steam reforming. Influence of the bio-oil composition on the process

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