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Template-Free Synthesis of Macroporous SiO2 Catalyst Supports for Diesel Soot Combustion
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02746 Hui Wang 1 , Zewen Chen 1 , Xingyu Deng 1 , Shengji Wu 1 , Qinqin Yu 2 , Wei Yang 1 , Jie Zhou 1
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02746 Hui Wang 1 , Zewen Chen 1 , Xingyu Deng 1 , Shengji Wu 1 , Qinqin Yu 2 , Wei Yang 1 , Jie Zhou 1
Affiliation
Catalytic combustion is considered as one of the most efficient methods for soot removal. However, the limited contact area between soot and active site is a key restrictive factor for the present reaction, as soot particles (particle size > 25 nm) are usually difficult to enter the inner pores of general catalysts. In this work, we report a simple and economic strategy to synthesize macroporous SiO2 as the support for combustion catalysts so as to facilitate the mass transfer in the inner surface of the catalysts. The macroporous SiO2 could be synthesized rationally through controlling and adjusting the Si–OH dehydration condensation and neck growth during the sol–gel preparation process. The porosity of SiO2 influences catalytic activity greatly in the reaction of soot catalytic combustion. Furthermore, macroporous SiO2 supported Ag and K catalysts exhibit superior soot oxidation activity, showing important potentiality for future applications.
中文翻译:
柴油烟灰燃烧大孔SiO 2催化剂载体的无模板合成
催化燃烧被认为是去除烟灰的最有效方法之一。然而,烟灰和活性位点之间的有限接触面积是本反应的关键限制因素,因为烟灰颗粒(粒径> 25 nm)通常难以进入普通催化剂的内孔。在这项工作中,我们报告了一种简单经济的策略,可以合成大孔SiO 2作为燃烧催化剂的载体,从而促进催化剂内表面的传质。通过控制和调节溶胶-凝胶制备过程中的Si-OH脱水缩合和颈部生长,可以合理地合成大孔SiO 2。SiO 2的孔隙率烟灰催化燃烧反应中对催化活性的影响很大。此外,大孔SiO 2负载的Ag和K催化剂表现出优异的烟ot氧化活性,显示出未来应用的重要潜力。
更新日期:2018-08-21
中文翻译:
柴油烟灰燃烧大孔SiO 2催化剂载体的无模板合成
催化燃烧被认为是去除烟灰的最有效方法之一。然而,烟灰和活性位点之间的有限接触面积是本反应的关键限制因素,因为烟灰颗粒(粒径> 25 nm)通常难以进入普通催化剂的内孔。在这项工作中,我们报告了一种简单经济的策略,可以合成大孔SiO 2作为燃烧催化剂的载体,从而促进催化剂内表面的传质。通过控制和调节溶胶-凝胶制备过程中的Si-OH脱水缩合和颈部生长,可以合理地合成大孔SiO 2。SiO 2的孔隙率烟灰催化燃烧反应中对催化活性的影响很大。此外,大孔SiO 2负载的Ag和K催化剂表现出优异的烟ot氧化活性,显示出未来应用的重要潜力。