文献类型：期刊文献

英文题名：Exploration of the influence of Fe additive on element migration and mineral transformation during coal gasification process

作者：Zhang, Binbin[1];Wang, Weicheng[1];Wang, Xingjun[1];Li, Ping[2];Wang, Jiancheng[3];Guo, Qinghua[1];Yu, Guangsuo[1];Liu, Haifeng[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[2]Ningxia Univ, Yinchuan 750021, Ningxia, Peoples R China;[3]Taiyuan Univ Technol, Taiyuan 030024, Peoples R China

年份：2025

卷号：386

外文期刊名：FUEL

收录：;EI(收录号：20250117639970);WOS:【SCI-EXPANDED(收录号:WOS:001400403900001)】；

基金：This work is jointly supported by the National Natural Science Foundation of China (U21A20319) . The experiment was assisted by Analytical and Testing Center in East China University of Science and Technology.

语种：英文

外文关键词：Additives; Coal gasification; Element migration; Mineral transformation; Thermodynamics

摘要：Within the entrained flow coal gasification technology, the combination of additives with the elements present in the coal brings about a modification in the melting temperature of the gasification slag by converting them into diverse minerals. Moreover, additives have the capacity to alter the migration and enrichment traits of specific elements. XRD, XRF, AAS and other analytical means are applied in the paper which explores mineral transformations and elemental transport behavior during coal gasification process of entrained flow, combined with thermodynamic calculations. And it was found that the enrichment characteristics of Si, Al, Ca and Fe were basically unaffected by the Fe additive. As the Fe content increases, the initial crystalline phase changes from anorthite to spinel. But excessive Fe additive allow the production of spinel to inhibit the production of calcium feldspar. More than 60% or even 100% of the Cr in slag is in the residue fraction, and the addition of the Fe promoted the transformation of the Cr residual fraction to acid-soluble fraction, which weakened the tendency of the enrichment of the Cr in the solid phase. As for Zn, the reducible fraction is completely 0, and part of the oxidizable fraction disappears completely, existing only in the form of the acid-soluble fraction, which enhances the volatility of Zn during the heating process. The addition of Fe increases the oxidizable fraction of Sr that is converted into the acid-soluble fraction, reducing the trend of Sr enrichment in the solid phase. Fe additive promote the conversion of Mn and Fe into the acid-soluble fraction, thus enhancing their migration trend towards the gas phase.