毛益萍¹,潘华^1,2,王晟康¹,杨仲余¹,张鼎盛¹,施耀²

• 1:树人大学 生物与环境工程学院，浙江 杭州 310015
• 2:浙江大学 化学工程与生物工程学院，浙江 杭州 310027

摘要(Abstract)：

以甲苯为研究对象，通过水热合成法制备了一系列MnO_x催化剂，结合催化活性评价和催化表征手段，考察了MnO_x催化氧化甲苯的构-效关系。研究表明：在不同制备温度的MnO_x催化剂中，催化活性的顺序为MnO_x-70 > MnO_x-90 > MnO_x-120，MnO_x-70催化剂具有最低的起燃温度（T₅₀=196℃），其在256℃下甲苯的转化效率可稳定在90%。催化剂的活性与比表面积、孔体积、Mn³⁺/Mn⁴⁺和O_latt/O_surf的比值有关。催化剂的比表面积和孔体积大小为MnO_x-70 > MnO_x-90 > MnO_x-120。催化剂中锰以Mn⁴⁺和Mn³⁺的形式存在，3种催化剂表面Mn³⁺/Mn⁴⁺的比值依次为MnO_x-120 > MnO_x-90 > MnO_x-70。3种催化剂表面O_latt/O_surf的比值依次为MnO_x-70 > MnO_x-90 > MnO_x-120。说明催化剂表面Mn⁴⁺和晶格氧含量越多，催化剂活性越好。

关键词(KeyWords)： 催化氧化;锰氧化物;甲苯;构-效关系

Abstract:

Keywords:

基金项目(Foundation): 浙江省自然科学基金（LY19E080023）；浙江树人大学中青年学术团队项目（XKJ0516205）；浙江树人大学科研启动基金（KXJ0517102）；国家级大学生创新创业训练计划项目（201811842020）。

作者(Author): 毛益萍¹,潘华^1,2,王晟康¹,杨仲余¹,张鼎盛¹,施耀²

DOI: 10.3969/j.issn.1003-9015.2019.06.018

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