摘要
利用煤矸石等原料制备分子筛-活性炭复合材料过程复杂,复合材料比表面积不高,且含杂晶,分子筛/活性炭比例及分子筛晶型调控困难。本文通过将商品活性炭表面进行Al_2O_3改性,采用溶胶-凝胶水热法制备出X型分子筛-活性炭复合材料,实现了分子筛/活性炭的按比例调控,并通过改变硅铝比调控了分子筛的晶型。并采用X射线衍射、氮气吸脱附、扫描电镜等分析测试手段表征了复合材料的结构和表面化学性质。结果表明:晶化温度100℃,晶化时间6 h,X型分子筛在活性炭表面负载效果好,复合材料的比表面积为720.47m^2/g,平均孔径为2.60nm。
The process of preparing molecular sieve activated carbon composites from coal gangue and other raw materials is complex. The specific surface area of composite materials is not high, and the proportion of hetero crystal, molecular sieve/activated carbon and molecular sieve are difficult to control. In this paper, we modified the surface of activated carbon with Al2O3. X-type zeolite-activated carbon composites were prepared by sol-gel hydrothermal method. We achieved the molecular sieve/activated carbon proportional regulation, and regulated the zeolite crystal form by changing the ratio of silica to alumina. The structure and surface chemical properties of the composites were characterized by X-ray diffraction, nitrogen adsorption and desorption and scanning electron microscopy. The results showed that when the crystallization temperature was 100 ℃ and the crystallization time was 6 h, the zeolite X had a good loading effect on activated carbon. The specific surface area of the composite was 720.47 m^2/g, and the average pore diameter was 2.60 nm.
作者
陈潇涵
王璜琪
卢畅宇
杨瑞
谢金瀚
Chen Xiaohan;Wang Huangqi;Lu Changyu;Yang Rui;Xie Jinhan(School of Chemical and Environmental Engineering, China University of Mining and Technolog)
出处
《广东化工》
CAS
2018年第9期4-6,14,共4页
Guangdong Chemical Industry
关键词
分子筛
活性炭
复合材料
晶化
溶胶-凝胶
molecular sieve： activated carbon
compositemateriah crystallization
Sol-gel
