微波辐照再生活性半焦工艺  

Regeneration of Activated Semi-coke by Microwave Irradiation

作　　者：常娜 覃彦 赵代伟 CHANG Na;QIN Yan;ZHAO Daiwei(College of Materials Science and Engineering, Xi’an University of Architectureand Technology, 710055 Xi’an, China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,西安博士讲师710055

出　　处：《煤炭转化》2019年第3期27-33,共7页Coal Conversion

基　　金：陕西省教育厅专项科研计划项目(17JK0442);西安建筑科技大学人才科技基金资助项目(RC1420)

摘　　要：以甲基橙为吸附质,针对吸附后的活性半焦,利用微波辐照对其进行再生。在不同微波功率和辐照时间下研究活性半焦的再生率和碳损耗率,利用扫描电子显微镜观察半焦的表面形貌,采用氮气吸附仪测定半焦的平均孔径和比表面积。结果表明,微波可以有效脱除活性半焦表面的甲基橙,由于反应器的特殊尺寸,未通气氛条件下活性半焦的再生率较通入氮气条件下活性半焦的再生率高。对于不同甲基橙吸附量的活性半焦,当微波辐照时间为30s时,再生率可保持在98%～99%。过高的微波功率及过长的辐照时间均会增加半焦的碳损耗率,导致再生率增幅缓慢,甚至下降。孔径结构分析表明,微波辐照过程可以优化半焦的孔隙结构。Based on the methyl orange employed as adsorbate, the activated semi-coke after adsorption was regenerated through microwave irradiation. The regeneration rate and carbon loss rate of activated semi-coke were investigated under the reaction conditions of different microwave powers and irradiation time, the surface appearance was investigated by SEM, and the BET surface area and pore size distribution were analyzed by N 2 adsorption. The results show that the methyl orange can be removed effectively, and the regeneration rate of activated semi-coke without the atmosphere of nitrogen is higher than that of activated semi-coke in the atmosphere of nitrogen due to the special size of reactor. Then whatever the adsorbed amounts of activated semi-coke are, the regeneration rate of activated semi-coke can maintain at 98%-99% under the regeneration time of 30 s, and excessive microwave power and inordinately long irradiation time can promote the carbon loss of activated semi-coke, which leads to slow increase of regeneration rate and even decline. In addition, the pore structure can be optimized in microwave irradiation process.

关 键 词：活性半焦 微波 再生 碳损耗 吸附 

分 类 号：TQ52[化学工程—煤化学工程]