摘要
从煤基固废高值化利用以及分子筛材料低成本制备两方面的迫切需求出发,本文以煤矸石、粉煤灰、煤气化渣和煤液化渣四种最主要的煤基固废为研究对象,从形成机制、化学组成、矿物性质以及结构与形貌特征等多方面阐述以其为原料制备分子筛的优势及可行性;系统总结了煤基固废活化预处理及晶化转化为分子筛的主要方法;以典型案例的形式,介绍并分析了煤固废基分子筛在气/液相吸附、多相催化等领域的应用优势.基于对煤固废基分子筛的制备、改性以及应用研究进展的综述与总结,提出了低能耗活化与晶化、骨架类型的拓展以及多领域应用探索三方面的研究趋势.
Abstract
High-value utilization of coal-based solid wastes is in urgent demands for the sustainable development of natural resources,and one promising strategy is to prepare zeolites by using coal-based solid wastes as raw materials.In this review,the formation mechanism and primary properties including chemical composition,mineral property,structural and morphological characteristics of four typical coal-based solid wastes(gangue,fly ash,gasification slag,and liquefaction slag)were introduced in detail.The main methods of activation pretreatments and zeolite crystallization were further summarized systematically.Moreover,the application advantages of zeolites prepared from coal-based solid wastes in gas/liquid adsorption and heterogeneous catalysis were discussed by specific cases.It is expected that more prospective studies on low-energy activation,diverse framework,and application exploration are highly desired for the synthesis and utilization of zeolites from coal-based solid wastes.
维普
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