Hydrogen Production from Co‐Gasification of Coal and Biomass in the Presence of CaO as a Sorbent

Gao, Wei; Li, Yan; Tahmoures, Mohammad; Safdar, Amir Hossein Asgari

doi:10.1002/ceat.201700272

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…The gasification temperature is usually less than 800 °C and is limited by the materials of the reactor under supercritical water (SCW) conditions, and the carbon conversion is only 50–60 %. Alkaline or alkaline‐earth catalysts, such as KOH, K 2 CO 3 , NaOH, Na 2 CO 3 , and Ca(OH) 2 , have been used to enhance carbon gasification and improve the gas yield . SCW can carry the catalyst into the interior of the coal char to increase the carbon conversion; meanwhile, evaporation of the alkaline metal is avoided owing to the lower temperature and water environment of the system .…”

Section: Introductionmentioning

confidence: 97%

“…Bi et al , found that both CaO and KOH could catalyze the gasification, hydrocarbon reforming, and water‐gas shift reactions. Gao et al obtained similar results upon studying the cogasification of coal and biomass in the presence of CaO. Guo et al compared the effect of K 2 CO 3 and Raney Ni on coal gasification in SCW, and the results showed that the homogeneous catalyst was better than the heterogeneous catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Behavior of Alkaline‐Metal Catalysts in Supercritical Water Gasification of Lignite

Zhou

Yan

et al. 2018

Chem Eng & Technol

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The efficient utilization of abundant low‐rank coals, which show high moisture and ash content, is significant for coal‐based energy systems. The gasification of Zhaotong lignite was performed with different alkaline‐metal catalysts, such as KOH, NaOH, K2CO3, and Na2CO3, in supercritical water. The behavior of the alkaline metal was also investigated. Potassium shows better catalytic activity than sodium. KOH not only promotes breakage of chemical bonds in the coal matrix to generate low‐molecular‐weight gases, but also alters the pore structure of the char to improve the gasification of carbon in the residue. However, potassium is partly inactivated upon reaction with minerals in coal in supercritical water gasification. In situ protection of potassium is realized by adding Ca(OH)2 under supercritical conditions.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Behavior of Alkaline‐Metal Catalysts in Supercritical Water Gasification of Lignite

Zhou

Yan

et al. 2018

Chem Eng & Technol

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“…Several simulation studies on biomass gasification with CO2 capture using CaO sorbent have been published. The reported studies mostly utilized Aspen Plus process simulation, which successfully simulated the process and generated results with high validity compared to available experimental data (Rupesh et al 2016, Shahbaz et al 2017, Zhou et al 2019, Gao et al 2018. However, none of the previous simulation studies used MSW as the feedstock.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Process Parameters Influence on Municipal Solid Waste Gasification with CO2 Capture via Process Simulation Approach

Rahma

Tamzysi

Hidayat

et al. 2020

Int. J. Renew. Energy Dev.

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Integration of gasification with CO2 capture using CaO sorbent is proposed as an alternative treatment to convert municipal solid waste (MSW) into energy. Aspen Plus process simulator was employed to study the process. Two models were built to represent the non-sorbent and the sorbent-enabled MSW gasification. The model validation against available experimental data shows high accuracy of the simulation result. The effect of CO2 capture using CaO sorbent on the syngas composition and lower heating value (LHV) was observed by comparing the two models, and sensitivity analysis was performed on both models. Several process parameters affecting the syngas composition and LHV were investigated, including CaO/MSW ratio, temperature, equivalence ratio, and steam/MSW ratio. The addition of CaO sorbent for CO2 capture was found to successfully reduce the CO2 content in the syngas, increase the H2 composition, and improve the syngas LHV at the temperature below 750 oC. The maximum H2 composition of 56.67% was obtained from the sorbent-enabled gasification. It was found that increasing equivalence ratio leads to a higher H2 concentration and syngas LHV. Raising steam/MSW ratio also increases the H2 production, but also reduces the LHV of the syngas. Observation of the temperature effect found the highest H2 production at 650 oC for both non-sorbent and sorbent-enabled gasification.

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“…Biomass gasification technology has developed as a clean and efficient way of producing hydrogen and it is also an attractive ways to utilize different biomass feedstocks. Among the available gasification agents, steam has several advantages like syngas with relatively high hydrogen content, eliminating the demand for expensive oxygen plants, avoiding the dilution effect of nitrogen from the air, and producing the syngas with high heating value [31,[40][41][42]. Numerous reports have been published on steam gasification of biomass for hydrogen production [43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Flowsheet Modeling and Simulation of Biomass Steam Gasification for Hydrogen Production

et al. 2020

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Hydrogen production from biomass steam gasification is systematically reviewed. Equilibrium modeling and simulation studies using various techniques for effective hydrogen production are presented. Heat integration, economic analysis of the hydrogen production, and systematic design algorithms research publications are overviewed and discussed for energy‐efficient and economic hydrogen production from various biomass feedstocks. Comparison and analysis of the results strongly suggest the viable potential of biomass steam gasification for hydrogen production from small to large scales with applications for thermal heat, power generation, and many other industrial fields.

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Hydrogen Production from Co‐Gasification of Coal and Biomass in the Presence of CaO as a Sorbent

Cited by 8 publications

References 31 publications

Behavior of Alkaline‐Metal Catalysts in Supercritical Water Gasification of Lignite

Behavior of Alkaline‐Metal Catalysts in Supercritical Water Gasification of Lignite

Investigation of Process Parameters Influence on Municipal Solid Waste Gasification with CO2 Capture via Process Simulation Approach

Flowsheet Modeling and Simulation of Biomass Steam Gasification for Hydrogen Production

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