Biomass gasification integrated with CO2 capture processes for high-purity hydrogen production: Process performance and energy analysis

Detchusananard, Thanaphorn; Im-orb, Karittha; Ponpesh, Pimporn; Arpornwichanop, Amornchai

doi:10.1016/j.enconman.2018.06.072

Cited by 68 publications

(18 citation statements)

References 46 publications

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“…Corella et al [27] studied the steam gasification of pine sawdust in a pilot plant using dolomite and a fluid catalytic cracking catalyst, which showed to be effective for the tar cracking and for the reforming of the product gas, hence improving the hydrogen production. The gasification of wood residue integrated with CO2 capture for high-purity hydrogen production has also been investigated using CaO as sorbent by modelling the process using ASPEN PLUS [28]. The H2 concentration from the biomass gasification process with CO2 capture was found to be always higher than that from the conventional process when a carbonation temperature lower than 750 ºC was used.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the gasification performance of multiple biomass types in a bubbling fluidized bed

González-Vázquez

García

Gil

et al. 2018

Energy Conversion and Management

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The present study investigates the air-steam gasification of ten commercial and alternative lignocellulosic biomass fuels (pine sawdust, chestnut sawdust, torrefied pine sawdust, torrefied chestnut sawdust, almond shells, cocoa shells, grape pomace, olive stones, pine kernel shells and pine cone leafs) in order to evaluate the product gas composition and the process performance in a bubbling fluidized bed gasifier with focus on the different biomass properties. Accordingly, an effort to correlate the biomass characteristics with the gasification results has been done. Pine kernel shell (PKS) was used to test the effect of the gasification temperature (700, 800 and 900 ºC), steam to air ratio in the gasifying agent (S/A=10/90, 25/75, 50/50 and 70/30) and stoichiometric ratio (SR=0.13 and 0.25) on the product gas composition, combustible gas (H2+CO+CH4) production, H2/CO ratio, heating value, energy yield and cold gas efficiency of the obtained gas. Results showed that higher temperature and S/A ratio favored H2 production and gasification performance. A higher value of SR slightly affected the gas composition, but led to a higher process efficiency as a consequence of a higher biomass conversion into gaseous combustible products. All the biomass samples of different origin and characteristics were then gasified at the best experimental conditions found (900 ºC, S/A=70/30, SR=0.25). Gasification of all the biomasses was feasible and H2 and combustible gas concentrations of 30-39 vol% and 59-78 vol% (inert gas-free basis), respectively, were obtained for the biomasses studied, with energy yields of 8-18 MJ/kgbiomass. Torrefied biomass showed similar combustible gas production than the corresponding raw biomass under the conditions studied, but it gave slightly higher H2 production and efficiency results. Possible correlations of the gasification performance

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Section: Introductionmentioning

confidence: 99%

Comparison of the gasification performance of multiple biomass types in a bubbling fluidized bed

González-Vázquez

García

Gil

et al. 2018

Energy Conversion and Management

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show abstract

“…This may be due to the fact that CaO will absorb CO 2 generated by biomass pyrolysis to produce CaCO 3 under high‐temperature conditions. But when the temperature is higher than 825°C, CaCO 3 will be decompose into CaO and CO 2 40 . And the content of CO 2 in the reaction atmosphere will increase, which promotes the Boudouard reaction 41,42 .…”

Section: Resultsmentioning

confidence: 99%

“…But when the temperature is higher than 825 C, CaCO 3 will be decompose into CaO and CO 2 . 40 And the content of CO 2 in the reaction atmosphere will increase, which promotes the Boudouard reaction. 41,42 Since the reaction is an endothermic reaction, it needs to absorb a lot of heat, so increasing the temperature will enhance the conversion rate of char.…”

Section: Biomass Char Steam Gasification Conversionmentioning

confidence: 99%

Study on the steam gasification reaction of biomass char under the synergistic effect of Ca‐Fe : Analysis of kinetic characteristics

Pang

Chen

et al. 2021

Int J Energy Res

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Biomass char gasification is an important part of biomass conversion technology; the addition of additives can effectively change the gasification reaction rate of char. The kinetic characteristics of steam gasification reaction of biomass char particles were explored by adding CaO, Fe 2 O 3 , and CaFe mixed catalyst to biomass, and the apparent activation energy and pre-exponential factors of char particles were obtained. Experimental results show that the kinetic reaction process of char steam gasification follows the shrinking cylinder model. Through linear fitting, it can be obtained that there is a good linear correlation between activation energy and pre-exponential factor, which follows the dynamic compensation effect. Under the same temperature conditions, CaO can accelerate the reaction rate of char, while Fe 2 O 3 can delay the gasification rate of char particles because of sintering phenomenon at high temperature. The synergistic effect of CaFe can reduce the total activation energy of the reaction. The addition of CaO can greatly change the kinetic performance of the Fe 2 O 3 catalyst, inhibit the sintering deactivation reaction of Fe 2 O 3 at high temperature, increase the diffusion path of steam, and promote the char steam gasification reaction.

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“…The transformation of the proportion of CO2 meant that the proportion of CO2 converted during the operation of a reactor to the proportion of CO2 contained in a feedstock and introduced into the reactor [19][20]. The conversion ratio of available CO2 in the feedstock and the CO2 in the product gas collected at the out of entrained flow gasifier was calculated using the following formulae.…”

Section: Conversion Of Co2mentioning

confidence: 99%

Simulation of Cotton Stalks for Syngas Generation Using CO2 and Air as Gasifying Agents

Maitlo

Mahar

Brohi

2020

Mehran Univ. res. j. eng. technol.

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Gasification of coal and biomass using CO2 and air mixture as a carrier gas offers an encouraging way to eliminate the shortage of energy and reduce carbon dioxide emissions. In the present study, the EulerianLagrangian approach was applied to understand the thermochemical conversion behavior of feedstock in entrained flow gasifier. Commercial CFD (Computational Fluid Dynamics) code ANSYS FLUENT®14 was used for the simulation purpose. It was observed that with variation in the CO2 in the air and the CO2 to cotton stalk ratio had a meaningful effect on gasification performance. The different ratios of air and CO2 in varying percentages such as 20% CO2, 30% CO2, 40% CO2, 50% CO2, 60% CO2, 70% CO2 and remaining percentages of air were introduced in entrained flow gasifier. With the increase in CO2 to cotton stalk ratio, the concentration of H2 and CO2 decreased whereas as the concentration of CO improved. It is revealed that mole fraction of CO and CH4 attained maximum when CO2% in the air was 50% and H2 mole fraction was observed maximum at a CO2% in the air was 30%. At 50% CO2 mixture in air, the maximum lower heating value and cold gas efficiency were observed. Therefore, the optimum situation might be 50% percentage CO2 in the gasifying agent for this entrained flow gasifier. Hence an increase in CO and H2, the cold gas efficiency and lower heating value reached the maximum. However, this study provides an appropriate route for energy production using cotton stalks as raw material and will help in designing and operation of the entrained flow reactor. The simulations indicate the thermodynamic limits of gasification and allow for the formulation of the general principles ruling this process. Moreover, no literature is available for the parametric investigations of Pakistani biomass gasification using entrained-flow gasifier. So this is a novel work for Pakistan and will be treated as foundation work for biomass gasification in the country.

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Biomass gasification integrated with CO2 capture processes for high-purity hydrogen production: Process performance and energy analysis

Cited by 68 publications

References 46 publications

Comparison of the gasification performance of multiple biomass types in a bubbling fluidized bed

Comparison of the gasification performance of multiple biomass types in a bubbling fluidized bed

Study on the steam gasification reaction of biomass char under the synergistic effect of Ca‐Fe : Analysis of kinetic characteristics

Simulation of Cotton Stalks for Syngas Generation Using CO2 and Air as Gasifying Agents

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