Characteristics of activated carbon in elevated-temperature pressure swing adsorption desulfurization

et al. 2021

Int J Coal Sci Technol

Self Cite

Coal-fired power generation is the main source of CO2 emission in China. To solve the problems of declined efficiency and increased costs caused by CO2 capture in coal-fired power systems, an integrated gasification fuel cell (IGFC) power generation technology was developed. The interaction mechanisms among coal gasification and purification, fuel cell and other components were further studied for IGFCs. Towards the direction of coal gasification and purification, we studied gasification reaction characteristics of ultrafine coal particles, ash melting characteristics and their effects on coal gasification reactions, the formation mechanism of pollutants. We further develop an elevated temperature/pressure swing adsorption rig for simultaneous H2S and CO2 removals. The results show the validity of the Miura-Maki model to describe the gasification of Shenhua bituminous coal with a good fit between the predicted DTG curves and experimental data. The designed 8–6–1 cycle procedure can effectively remove CO2 and H2S simultaneously with removal rate over 99.9%. In addition, transition metal oxides used as mercury removal adsorbents in coal gasified syngas were shown with great potential. The techniques presented in this paper can improve the gasification efficiency and reduce the formation of pollutants in IGFCs.

Section: H 2 S-co 2 Removalmentioning

confidence: 99%

Development of new technology for coal gasification purification and research on the formation mechanism of pollutants

et al. 2021

Int J Coal Sci Technol

Self Cite

“…1. According to elevating the working temperature, the reversibility of H 2 S adsorption was improved (Hao et al 2019…”

Section: H2s-co2 Removalmentioning

confidence: 99%

Development of new technology for coal gasification purification and research on the formation mechanism of pollutants

et al. 2021

Preprint

Self Cite

Coal-fired power generation is the main source of CO2 emission in China. To solve the problems of declined efficiency and increased costs caused by CO2 capture in coal-fired power systems, an integrated gasification fuel cell (IGFC) power generation technology was developed. The interaction mechanisms among coal gasification and purification, fuel cell and other components are further studied for IGFCs. Towards the direction of coal gasification and purification, we studied gasification reaction characteristics of ultrafine coal particles, ash melting characteristics and their effects on coal gasification reactions, the formation mechanism of pollutants. We further develop an elevated temperature/pressure swing adsorption rig for simultaneous H2S and CO2 removals. The results show the validity of the Miura-Maki model to describe the gasification of Shenhua bituminous coal with a good fit between the predicted DTG curves and experimental data. The designed 8-6-1 cycle procedure can effectively remove CO2 and H2S simultaneously with removal rate over 99.9%. In addition, transition metal oxides used as mercury removal adsorbents in coal gasified syngas were shown with great potential. The techniques presented in this paper can improve the gasification efficiency and reduce the formation of pollutants in IGFCs.

“…8-6-1 ETPSA cycle procedures. AD: adsorption; RH: high pressure steam rinse; PE: pressure equalization with columns (1, 2) or tanks (A, B, C, D); BD: counter-current blow down; PG: N2 purge; V: vacuum desorption; PP: pressurization with product gas.According to elevating the working temperature, the reversibility of H2S adsorption was improved(Hao et al 2019). Adsorbed H2S could be detached from the adsorbent and 7 collected during vacuum desorption or purge step.…”

mentioning

confidence: 99%

Development of new technology for coal gasification purification and research on the formation mechanism of pollutants

et al. 2020

Preprint

Self Cite

Coal-fired power generation is the main source of CO2 emission in China. To solve the problem of efficiency decline and cost increase caused by CO2 capture of coal-fired power generation, Prof. Peng (Peng and Han 2009) proposed an integrated gasification fuel cell (IGFC) power generation technology. The interaction mechanism of coal gasification purification, fuel cell and other components need to be further study in the IGFC. To develop new technology for coal gasification and purification, we studied gasification reaction characteristics of ultrafine coal particles, ash melting characteristics and effects on coal gasification reaction, the formation mechanism of pollutants and developed an elevated temperature pressure swing adsorption rig for H2S and CO2 simultaneous removal. The results show that the Miura-Maki model appropriate to perform gasification kinetics of Shenhua bituminous coal and the predicted DTG curves fit the experimental data well. The designed 8-6-1 cycle procedure can effectively remove CO2 and H2S simultaneously, and the removal rate is over 99.9%. In addition, the transition metal oxides used as mercury removal adsorbents in coal gasification syngas has great potential. The technique presented in this paper can improve the gasification efficiency and reduce the formation of pollutants for IGFC.