Catalytic coal gasification technology shows prominent advantages in enhancing coal gasification reactivity and is restrained by the cost of catalyst. Two typical biomass ash additions, corn stalk ash (CSA, high K–Na and low Si) and poplar sawdust ash (PSA, high K–Ca and high Si), were employed to study the influence of biomass ash on pyrolysis process and char gasification reactivity of the typical anthracite. Microstructure characteristics of the char samples were examined by X-ray diffraction (XRD). Based on isothermal char-CO₂ gasification experiments, the influence of biomass ash on reactivity of anthracite char was determined using thermogravimetric analyzer. Furthermore, structural parameters were correlated with different reactivity parameters to illustrate the crucial factor on the gasification reactivity varied with char reaction stages. The results indicate that both CSA and PSA additives hinder the growth of adjacent basic structural units in a vertical direction of the carbon structure, and then slow down the graphitization process of the anthracite during pyrolysis. The inhibition effect is more prominent with the increasing of biomass ash. In addition, the gasification reactivity of anthracite char is significantly promoted, which could be mainly attributed to the abundant active AAEM (especially K and Na) contents of biomass ash and a lower graphitization degree of mixed chars. Higher K and Na contents illustrate that the CSA has more remarkable promotion effect on char gasification reactivity than PSA, in accordance with the inhibition effect on the order degree of anthracite char. The stacking layer number could reasonably act as a rough indicator for evaluating the gasification reactivity of the char samples.

催化煤气化技术在提高煤气化反应性方面显示出显着的优势，并且受到催化剂成本的限制。研究了两种典型的生物质灰分的添加：玉米秸秆灰分（CSA，高K-Na和低Si）和杨木锯末灰（PSA，高K-Ca和高Si）对生物质灰分对热解过程和焦炭的影响。典型无烟煤的气化反应性。通过X射线衍射（XRD）检查炭样品的微观结构特征。基于等温炭-CO ₂气化实验中，用热重分析仪测定了生物质灰分对无烟煤焦反应性的影响。此外，结构参数与不同的反应性参数相关，以说明气化反应性随焦炭反应阶段而变化的关键因素。结果表明，CSA和PSA添加剂均会阻碍相邻基本结构单元在碳结构垂直方向上的生长，从而减缓了无烟煤在热解过程中的石墨化过程。随着生物量灰分的增加，其抑制作用更加突出。此外，无烟煤焦的气化反应性大大提高，这主要归因于生物质灰分中丰富的活性AAEM（尤其是钾和钠）含量，以及混合炭的石墨化程度较低。较高的K和Na含量说明，根据对无烟煤焦度的抑制作用，CSA对炭化反应的促进作用比PSA更为显着。堆积层数可以合理地用作评估焦炭样品的气化反应性的粗略指标。