Sintering or agglomeration is formed in the process of the gasification of coal when fluxing K₂CO₃, which leading to the entire bed defluidization. In order to study the catalytic coal gasification reactivity and agglomeration properties in pressurized fluidized bed, Wangjiata raw coal, demineralized coal with HCl-HF treatment, and raw coal with different amounts of clay mineral addition were selected. The catalytic coal gasification reactivity, the agglomeration and sintering properties were studied. As well as water-soluble catalyst recovery from the gasification residue was also determined. The results show that for potassium-catalyzed steam gasification, not only coal ash content but also composition affected the gasification reactivity, agglomeration, and catalyst recovery. The carbon conversion increased varying degrees with increasing K₂CO₃ loadings, K₂CO₃ impregnated coal showed a high degree of agglomeration, and agglomeration increased with increasing K₂CO₃ amount. Demineralized coal couldn't improve the agglomeration property. The addition of Clay mineral, was found to be very efficient in anti-sintering. However, compared with demineralized coal, the carbon conversion and water washing catalyst recoveries decreased obviously for those samples with the addition of clay minerals. The test verifies that part of potassium catalyst irreversibly reacted with coal ash to form relatively water-insoluble potassium compounds such as kaliophilite and sanidine.

助熔剂K ₂ CO ₃在煤的气化过程中形成烧结或结块，从而导致整个床层脱液。为了研究加压流化床中的催化煤气化反应性和团聚性能，选择了王家塔原煤，HCl-HF处理的软化煤和添加了不同粘土矿物量的原煤。研究了催化煤气化反应性，团聚和烧结性能。还确定了从气化残余物中回收的水溶性催化剂。结果表明，对于钾催化的蒸汽气化，不仅煤灰含量而且其组成也会影响气化反应性，团聚和催化剂的回收率。碳转化率随着K ₂ CO ₃负载量K _2的增加而不同程度地增加。浸渍了CO _3的煤显示出高度的团聚，并且团聚随着K ₂ CO ₃含量的增加而增加。脱矿煤不能改善团聚性能。发现添加粘土矿物在抗烧结方面非常有效。然而，与软化煤相比，添加了粘土矿物的样品的碳转化率和水洗催化剂的回收率明显降低。该测试验证了钾催化剂的一部分与煤灰不可逆地反应，形成了相对水不溶性的钾化合物，如水铝镁石和山铁矿。