摘要
采用不同类型分子筛浸渍负载活性组分Ru制备Ru/M(M=β、MCM-41、Y、ZSM-5)催化剂,考察其对甲苯的催化性能,并通过XRD、BET、SEM、XPS、H_(2)-TPR、NH_(3)-TPD等表征,分析催化剂的孔道结构、酸性位等物化结构对催化活性的影响.结果发现以贵金属Ru为活性组分,Y为载体的催化剂催化性能最优,在300℃左右,甲苯基本完全降解,CO_(2)选择性接近99%,几乎无副产物生成.由此说明,适宜的孔径尺寸、丰富的酸性位、较好的氧化还原性能和较大的比表面积能有效促进分子筛催化剂对甲苯的催化氧化.
Ru/M(M=β, MCM-41,Y, ZSM-5) catalysts were prepared by impregnating the active component Ru with different types of molecular sieves to investigate their catalytic performance for toluene. The effect of physical and chemical structures such as pore structure and acid site on catalytic activity was analyzed by XRD, BET, SEM, XPS, H_(2)-TPR and NH_(3)-TPD.The results showed that the catalyst with precious metal Ru as the active component and Y as the carrier exhibited the best catalytic performance. At about 300 ℃, toluene was almost completely degraded,and the selectivity of CO_(2) was close to 99% with almost no by-product. This indicates that appropriate pore size, abundant acid sites, good redox performance and large specific surface area can effectively promote the catalytic oxidation of toluene by molecular sieve catalysts.
作者
陈昊
周溦溦
郑兴兴
胡婕
苏哲
杨天宇
曹爽
骆立刚
CHEN Hao;ZHOU Weiwei;ZHENG Xingxing;HU Jie;SU Zhe;YANG Tianyu;CAO Shuang;LUO Ligang(China Jiliang University,Hangzhou,310018,China;Focused Photonics(Hangzhou)Inc.,Hangzhou,310000,China;Zhejiang Light Industrial Products Inspection and Research Institute,Hangzhou,310000,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第2期585-596,共12页
Environmental Chemistry
基金
浙江省自然科学基金(LY21E080020)
浙江省市场监督管理局质量技术基础NQI项目(20200116)资助。
关键词
催化氧化
甲苯
分子筛
钌
孔道结构
catalytic oxidation
toluene
molecular sieve
ruthenium
pore structure
