| 刘皓月,费兆阳,戴勇,陈献,汤吉海,崔咪芬,乔旭.高比表面CexTi1-xO2催化剂的结构表征及其HCl催化氧化性能[J].分子催化,2014,(4):329-335 |
| 高比表面CexTi1-xO2催化剂的结构表征及其HCl催化氧化性能 |
| Structure Characterization and Catalytic Performance of High Surface Area CexTi1-xO2 Catalysts in HCl Oxidation |
| 投稿时间：2014-04-04 修订日期：2014-05-08 |
| DOI： |
| 中文关键词: CexTi1-xO2 HCl 催化氧化 氯循环 纳米催化剂 |
| 英文关键词:CexTi1-xO2 HCl Catalytic oxidation Chlorine recycle Nano catalyst |
| 基金项目:国家科技支撑计划;江苏省科技支撑计划;江苏省高校自然科学基金面上项目;中国博士后科学基金;国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| 摘要点击次数: 2128 |
| 全文下载次数: 8201 |
| 中文摘要: |
| 以硝酸铈，硫酸钛为前驱体，用氨水共沉淀法制备了一系列CexTi1-xO2催化剂。利用XRD、Raman、N2吸附-脱附、H2-TPR对催化剂进行了表征并考察了其催化HCl氧化制Cl2的性能。结果表明：复合氧化物较CeO2和TiO2更加分散甚至高度弥散，大大增加了其比表面积，最高可达170.5 m2 g-1，同时CeO2与TiO2之间的相互作用显著提高了其可还原氧物种数目，改善了其氧化还原性能。催化反应结果表明，复合氧化物的活性较CeO2和TiO2显著提升，Ce0.1Ti0.9O2表现出了良好的氯化氢催化氧化能力和较好的催化稳定性，在430 ℃时氯气产率可以达到0.90 gCl2 gcat-1 h-1，反应60 h后，氯气产率稳定在0.76 gCl2∙gcat-1∙h-1。 |
| 英文摘要: |
| A series of CexTi1-xO2 catalysts were prepared by ammonia co-precipitation method. The physiochemical properties of the catalysts were characterized by XRD, Raman, N2 adsorption-desorption and H2-TPR. The catalytic performances of the samples for the gas-phase HCl oxidation to recycle Cl2 were investigated. The results of XRD and Raman showed that mixed oxides were more dispersed than pure CeO2 and TiO2, even existed as the amorphous structures, leading to the special surface areas of mixed oxides much higher than that of pure CeO2 and TiO2. Ce0.1Ti0.9O2 possessed a surface area as high as 170.5 m2 g-1. Meanwhile, the results of H2-TPR showed that the reducibility of the mixed oxides was greatly improved by the interaction of CeO2 and TiO2. Mixed oxides showed higher activities than pure CeO2 and TiO2. The STY (space time yield) of Cl2 over Ce0.1Ti0.9O2 reached to 0.90 gCl2 gcat-1 h-1 at 430 ℃. The long-term stability test showed Ce0.1Ti0.9O2 can maintain its activity at 0.76 gCl2∙gcat-1∙h-1 for 60 h on stream. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
