High concentrations of CO and CO2 inhibit lignite gasification in supercritical water

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2024-11-30 DOI:10.1016/j.supflu.2024.106486

Rui Zhang, Shuaiqi Zhao, Han Huang, Kunpeng Zhao, Bofeng Bai

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引用次数: 0

Abstract

Supercritical water gasification (SCWG) technology enables the efficient utilisation of lignite to produce H2, CO, and CO2. Coal gasification differs under different atmospheres and H2 promotes the pyrolysis of carbon structures. While simultaneous increases in H2, CO, and CO2 are observed, their combined effect on the SCWG of coal remains unknown. Formic acid (FA) was used to produce H2, CO, and CO2 in the supercritical water, and the impact of the gaseous product generated from high-concentration (>30 wt%) FA decomposition on the SCWG of lignite was experimentally investigated. In comparison to lignite gasification in pure supercritical water, the carbon efficiency of lignite gasification in 30 wt% FA solution decreased by 7.66 %, and the mass conversion of lignite decreased by 4.0 %. Higher concentrations of CO and CO2 yielded stronger inhibition of lignite SCWG.

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.