吸附有苯酚氧化残留物的Cu-Ce／AC吸附-催化剂的氢处理研究.pdfVIP

第36卷 第2期 燃 料 化 学 学 报 Vo1．36 No．2 2008年4月 Journal of Fuel Chemistry and Technology Apr．2008 文章编号：0253-2409(2008)02—227-05 吸附有苯酚氧化残留物的Cu-Ce／AC吸附一催化剂的氢处理研究 雷智平 ，刘振宇 ，李秉正 ， (1．中国科学院山西煤炭化学研究所煤转化国家重点实验室，山西太原 030001；2．中国科学院研究生院，北京 100039) 摘 要：对经苯酚吸附和干态催化氧化过程后吸附有苯酚残留物的活性炭载氧化铜和氧化铈(Cu—Ce／AC)进行了氢处理研 究。结果表明，氢处理可明显促进残留物的分解，恢复Cu—Ce／AC对苯酚的吸附性能，减少在后续苯酚氧化过程中苯酚脱附 量。氢处理温度越高，苯酚吸附容量恢复得越好。但氢处理不能恢复Cu—Ce／AC对苯酚的催化氧化活性，是由于活性组分晶 粒长大所致。 关键词：干法催化氧化；炭基吸附剂；炭基催化剂；苯酚；残留物；氢处理 中图分类号：TQ032 文献标识码：A Hydrogen treatment of Cu-Ce／AC containing phenol oxidation residue LEI Zhi—ping 一．LIU Zhen—yu ．LI Bing—zheng。’ (1．State Key Laboratory of Coal Conversion，Institute ofCoal Chemistry，Chinese Academy ofSciences，Ta~uan 030001，China； 2．Graduate School of the Chinese Academy of Sciences，Beijing 100039，China) Abstract：Formation of residues is a common issue in oxidation of phenol over activated carbon(AC)based materials，which results in the decrease of phenol adsorption capacity and phenol oxidation activity of these materials．Therefore，H2-treatment of Cu—Ce／AC(activated carbon supported copper and cerium)subjected to phenol adsorption and oxidation and containing phenol oxidation residues were investigated at elevated temperatures．The H2-treatment is found effective to promote decomposition of the residues，to recover phenol adsorption capacity of Cu—Ce／AC，and to reduce phenol desorption in the subsequent phenol oxidation process． In the range of 400 oC～600 oC the effectiveness of H2-treatment increases with the treatment temperature．The ， H2一treatment，however，Can not recover the phenol oxidation activity of Cu—Ce／AC due to agglomeration of the active phase． Key words：catalytic dry oxidation；carbon—supported catalyst；carbon—based sorbent；phenol；residue； hydrogen