 CFD modeling of gasification process in tapered fluidized bed gasifierHossein Askaripour Energy, 2020, vol. 191, issue C Abstract: This article presents a two-dimensional simulation of the coal gasification in tapered fluidized bed gasifier. The effects of tapered angle, gasifier temperature, velocity of gasifying agent, and steam-to-air ratio on the gas compositions, lower heating value (LHV), and higher heating value (HHV) were examined. In order to find the appropriate operating conditions of coal gasification, carbon conversion efficiency (CCE) and cold gas efficiency (CGE) were also explored. It was found that with an increase of the gasifier temperature, CCE and CGE of the tapered gasifier diminishes. Increasing tapered angle results in a decrease of the LHV and HHV of the gas products, whereas the CCE of gasification process increases. The CGE of the gasifier increases as the tapered angle goes up from 3 to 5°, but it slightly varies with a further increase of the tapered angle from 5 to 11°. The results indicate that as the velocity of gasifying agent increases, LHV and HHV of the product gas drop while CCE of the gasifier enhances. It was also found that the concentrations of H2, CO, and CO2 decrease with an increase in the steam-to-air ratio. Keywords: Tapered fluidized bed gasifier; Tapered angle; Gasifier temperature; Steam-to-air ratio; Eulerian modeling (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:191:y:2020:i:c:s0360544219322108 DOI: 10.1016/j.energy.2019.116515 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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