文献类型：期刊文献

中文题名：粘土孔结构及添加铈对于催化剂上苯吸附-脱附-催化氧化性能的影响

英文题名：Effects of Clay Pore Structure and Addition of Cerium on Adsorption/Desorption and Catalytic Oxidation of Benzene

作者：左树锋[1];周仁贤[2];齐陈泽[1]

机构：[1]绍兴文理学院应用化学研究所;[2]浙江大学催化研究所

年份：2012

卷号：30

期号：2

起止页码：192

中文期刊名：中国稀土学报

外文期刊名：Journal of the Chinese Society of Rare Earths

收录：CSTPCD、、北大核心2011、Scopus、CSCD2011_2012、北大核心、CSCD

基金：国家自然科学基金(20577043);绍兴文理学院科研项目(2011LG1007);浙江省化学实验教学示范中心实验教学改革项目资助

语种：中文

中文关键词：柱撑粘土;吸附-催化;TPSR;VOC;稀土

外文关键词：pillared clays; adsorption-catalysis; TPSR; VOC; rare earths

中文摘要：采用3种不同孔结构的粘土材料,即Na型-蒙脱土(Na-mmt)、Al柱撑粘土(Al-PILC)和AlCe复合柱撑粘土(AlCe-PILC),以上述材料为载体,负载Mn和MnCe作为易挥发有机物(VOC)苯的氧化催化剂。利用N2吸附、程序升温还原(TPR)和程序升温表面反应(TPSR)等手段对催化剂的织构-结构、氧化-还原和吸附-脱附等性能进行了表征和分析。结果表明对于具有高比表面积和大孔径的改性粘土材料,添加适量的Ce有利于催化剂对低浓度苯的吸附,吸附量显著增加、脱附温度提高,上述条件都有利于对低浓度苯的深度氧化。同时,这一研究结果对改善"吸附-催化"一体化的低温吸附、高温脱附及氧化性能有极其重要的意义。

外文摘要：Na-mmt,Al-PILC and AlCe-PILC were synthesized and used as carriers to support Mn and MnCe catalysts for deep benzene oxidation.The texture-structure,redox and adsorption/desorption performance were characterized by N2 adsorption,H2-TPR and Benzene/air-TPSR techniques.The results showed that the higher surface area,the larger pore structure and adding proper Ce were conductive to adsorb more consumption of benzene and can delay benzene desorption.Meanwhile,the result has important significance because it reveals the law about ＂adsorption-desorption-catalytic oxidation＂ including adsorption at low temperature,desorption at high temperature and catalytic oxidation.