Ash-related problems may induce serious slagging problems in gasification boilers, especially in the presence of alkali and alkaline earth metals at high concentrations. Suitable additives have shown to be promising in suppressing the slagging characteristics of high-alkali coal. In this study, the results of lab-scale experiments for Zhundong coal were demonstrated, especially in Yihua coal (YHc) here, with six common additives, which are kaolin (A), boehmite (B), corundum (C), quartz (D), raw vermiculite (E) and ripe vermiculite (F), at fractions of 3%, 6%, and 9%. The priority of reactions involving AAEM-based species was investigated by characterizing ash samples and thermodynamic equilibrium calculation by Factsage 7.2. The gasification residue of YHc alone (O) was adopted as the reference sample. All six additives could affect the release and transformation of Na, the capture order from high to low was A, F, E, O, B, D, and C, and the slagging risks of different samples were F, E, D, O, A, B, and C in sequence. Given both the ability of additives to capture alkali/alkaline earth metal-based species and the ATFs of the coal ashes, kaolin was proved as a suitable additive for YHc gasification. Furthermore, 6% (mass ratio) was considered the most reasonable addition ratio.

与灰有关的问题可能在气化锅炉中引起严重的结渣问题，尤其是在存在高浓度的碱金属和碱土金属的情况下。在抑制高碱性煤的结渣特性方面已显示出合适的添加剂。在这项研究中，证实了准东煤的实验室规模试验结果，特别是此处的宜化煤（YHc），其中有六种常见添加剂，即高岭土（A），勃姆石（B），刚玉（C），石英（ D），原始ver石（E）和成熟ver石（F）的比例分别为3％，6％和9％。通过表征灰分样品和通过Factsage 7.2计算热力学平衡来研究涉及基于AAEM的物种的反应的优先级。仅将YHc（O）的气化残留物用作参考样品。所有六种添加剂均会影响Na的释放和转化，从高到低的捕获顺序为A，F，E，O，B，D和C，不同样品的结渣风险为F，E，D，O ，A，B和C。考虑到添加剂捕获碱/碱土金属基物质和煤灰的ATF的能力，高岭土被证明是YHc气化的合适添加剂。此外，认为6％（质量比）是最合理的添加比例。