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张溢,石琎,张志翔,陈铭夏,江治,上官文峰.锰氧八面体分子筛室温同时去除甲醛和臭氧的性能研究[J].分子催化,2019,33(3):201-208

锰氧八面体分子筛室温同时去除甲醛和臭氧的性能研究

Study on Simultaneous Removal of Formaldehyde and Ozone by Manganese Oxygen Octahedral Molecular Sieve at Room Temperature

投稿时间：2019-06-04 修订日期：2019-06-13

DOI：

中文关键词: 锰氧八面体分子筛甲醛臭氧催化氧空位

英文关键词:manganese octahedral molecular sieve formaldehyde ozone catalysis oxygen vacancy

基金项目:国家重点研究与发展计划（No.2017YFC0211804）

作者	单位	E-mail
张溢	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240
石琎	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240
张志翔	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240
陈铭夏	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240
江治	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240
上官文峰	上海交通大学机械与动力工程学院燃烧与环境技术中心, 上海 200240	shanggaun@sjtu.edu.cn

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中文摘要:

通过回流法、无溶剂法及水热法合成了3种锰氧八面体分子筛催化剂（OMS-2），并对其室温同时去除甲醛和臭氧的反应活性进行了研究.结果表明无溶剂法制备的锰氧八面体分子筛（OMS-2-S）具有最高的甲醛转化率，且水气的加入对3种OMS-2催化剂的二氧化碳产率均具有明显的促进作用.并通过XRD、SEM和XPS等技术对催化剂进行表征，考察了催化剂物理化学性质对其催化活性的影响.从表征结果可得，较强的吸附能力、丰富的氧空位及较强的氧物种移动性是OMS-2-S催化剂活性较高的原因.

英文摘要:

Manganese octahedral molecular sieve catalysts (OMS-2) were synthesized by reflux method, solvent-free method and hydrothermal method, and utilized on simultaneous removal of formaldehyde and ozone at room temperature. The activity test results show that the manganese oxide octahedral molecular sieve prepared by solvent-free method (OMS-2-S) displays the highest HCHO conversion rate under both dry air and humid air conditions, respectively 88.5% and 95.1%; and exhibits 100% O₃ decomposition rate under dry air condition and 99.6% CO₂ yield under humid condition (50%RH). The addition of water vapor exhibits obvious promoting effect on the carbon dioxide yield of the three OMS-2 catalysts but has negative effect on the HCHO conversion rate and O₃ decomposition rate to the OMS-2 catalysts. The OMS-2 catalysts were characterized by XRD, SEM and XPS techniques to investigate the effect of the physicochemical properties of the catalyst on its catalytic activity. XPS analysis results demonstrated that OMS-2-S catalyst has the lowest AOS, abundant oxygen vacancies and adsorbed oxygen species at the catalyst surface. H₂-TPR results illustrated that the higher reducibility of Mn element and the higher mobility of surface oxygen species on OMS-2-S catalyst are beneficial to the adsorption and decomposition of HCHO on the catalyst surface. Thus, strong adsorption capacity, abundant oxygen vacancies and strong oxygen species mobility are the reasons for the high activity of OMS-2-S catalyst.

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