解聚
催化作用
煤矸石
催化裂化
煤
化学工程
材料科学
危险废物
结晶度
燃烧
开裂
废物管理
化学
冶金
有机化学
复合材料
高分子化学
工程类
作者
Ruoyu Wang,Ye Song,Xue Yang,Jihong Zhou,Qiuqiao Jiang,Zhenbo Wang,Lei Wang,Bo Peng,Hang Song,Wei Lin
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2022-08-16
卷期号:10 (34): 11376-11386
被引量:5
标识
DOI:10.1021/acssuschemeng.2c03449
摘要
Globally, exploring efficient utilization technologies for coal gangue, a notorious hazardous solid waste, is one of the most important issues among current sustainable development topics. Herein, a green and energy-efficient self-combustion–depolymerization (SCD) approach is proposed to activate coal gangue into highly reactive silica and alumina species for fluid catalytic cracking (FCC) catalyst synthesis. Starting from microspherical precursors composed of SCD-activated coal gangue, FCC catalysts (SCD-Y) bearing in situ-generated Y zeolites with a relative crystallinity of ca. 50% can be readily fabricated via hydrothermal synthesis. SCD-Y shows much higher catalytic activities toward heavy oil cracking than conventional catalysts. The improved performances could be ascribed to the higher accessibility of active sites and better diffusion properties of the hierarchical structure. Remarkably, compared to the conventional method, the energy consumption corresponding to material input (Em) and the total manufacturing process (Etot) of this SCD route falls by 46.8 and 33.5%, respectively.
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