中低品位菱镁矿煅烧产物硫化氢脱除性能研究  

Study on Hydrogen Sulfide Removal with Calcined Product from Medium and Low-grade Magnesite

作　　者：李东亮 王康军 李运甲 郑玉华 许光文 崔彦斌[2] LI Dongliang;WANG Kangjun;LI Yunjia;ZHENG Yuhua;XU Guangwen;CUI Yanbin(School of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Beijing Aerospace Environmental Engineering Co.,Ltd.,Beijing 102300,China)

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142 [2]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [3]北京航天环境工程有限公司,北京102300

出　　处：《金属矿山》2022年第9期223-229,共7页Metal Mine

基　　金：辽宁省自然科学基金项目(编号:LJKZ0446)。

摘　　要：中低品位菱镁矿因难以直接利用而大量堆积,制备高温脱硫剂是其资源化利用的有效途径之一。研究了不同煅烧温度和煅烧时间下煅烧产物的脱硫性能,并通过XRD、SEM、BET表征产品的晶粒尺寸、比表面积及孔径等性质,从微观角度分析H_(2)S脱除机理。在煅烧温度750℃和煅烧时间30 min的条件下,煅烧产物的比表面积可达168.42 m^(2)/g、平均孔径为4.44 nm,且晶粒尺寸较小(9.10 nm)。将此条件下获得的煅烧产物用于脱硫,在吸附温度500℃、空速7200 h^(-1)的工况下,H_(2)S穿透时间为162 min,穿透硫容可达14.75 mg/g。研究结果为中低品位菱镁矿的资源化利用提供了新途径。Medium and low grade magnesite is piled up because of the difficult in direct ultilization,while the preparation of high temperature desulfurizer is one of the effective ways for its resource utilization.The desulfurization performance of the calcined products under different calcination temperatures and calcination time were studied.The grain size,specific surface area and pore size of the products were characterized by XRD,SEM and BET,and the removal mechanism of H_(2)S was analyzed from the microscopic perspective.Under the conditions of calcination temperature of 750℃and calcination time of 30 min,the specific surface area of calcination products can reach 168.42 m 2/g,the average pore size is 4.44 nm,and the grain size is small(9.10 nm).The calcination products obtained under these conditions were used for desulfurization.Under the adsorption temperature of 500℃and the space speed of 7200 h^(-1),the H_(2)S penetration time was 162 min and the sulfur penetration capacity could reach 14.75 mg/g.The results provide a new way for the resource utilization of medium and low grade magnesite.

关 键 词：菱镁矿 中低品位 硫化氢 轻烧氧化镁 硫容 

分 类 号：X753[环境科学与工程—环境工程]