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Title: The Effect Of Steam On Air Gasification Of Mechanically Activated Coal In A Flow Reactor
Authors: Nikitin, A. D.
Ryzhkov, A. F.
Butakov, E. B.
Burdukov, A. P.
Issue Date: 2021
Publisher: Serbian Society of Heat Transfer Engineers
Citation: The Effect Of Steam On Air Gasification Of Mechanically Activated Coal In A Flow Reactor / A. D. Nikitin, A. F. Ryzhkov, E. B. Butakov, et al. — DOI 10.2298/TSCI200601208N // Thermal Science. — 2021. — Vol. 25. — Iss. 1. — P. 321-330.
Abstract: A combined steam-gas plant with in-cycle steam gasification of coal and hot gas purification is considered as a promising technology for increasing the efficiency of energy production with simultaneous reduction in environmental impact. To in-tensify steam-air gasification, mechanical activation of fuel is used; it consists in high-stress grinding in a mill-disintegrator. The supply of steam to the gasifier allows an increase in reactivity of fuel, suppression of sorbent decomposition in the unit of hot desulfurization, reduction in the steam load on the shift reactor, increase in useful external work of gas turbine expansion, reduction in nitrogen oxide formation, and general increase in the efficiency and ecological compatibil-ity of energy generation. On the other hand, a significant amount of steam can deteriorate the heat balance and efficiency of the gasifier. In this work, the influ-ence of the steam/fuel ratio on steam-air gasification of mechanically activated Kuznetsk coal in a flow reactor was studied experimentally. The excess air coeffi-cient was maintained constant and equal to 0.51, which corresponded to a temper-ature at the reactor outlet of about 1100 °C. When steam was supplied, the fuel and air-flow rates were adjusted to ensure a constant gas-dynamic regime. To evaluate the obtained regimes, the heat and material balances were compiled. A positive effect of steam on characteristics of the gasification process was revealed. For the studied coal, the maximum degree of coal conversion and the calorific value of synthesis gas are achieved with a steam/fuel ratio of about 0.4 kg/kg. © 2021 Society of Thermal Engineers of Serbia.Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia.This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85100656349
PURE ID: 20903045
ISSN: 3549836
DOI: 10.2298/TSCI200601208N
metadata.dc.description.sponsorship: Research results modernization of the experimental stand were obtained within the framework of the state assignment for the IT SB RAS, research results coal gasification was funded by Russian Foundation for Basic Research (project No. 19-38-50071, project No. 18-29-24028).
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