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合成了TiO_2-CeO_2柱撑黏土负载V_2O_5催化剂,通过XRD、氮气吸附脱附、TG、FT-IR、H_2-TPR、NH_3-TPD、XPS等方法对其物理化学性质进行了表征,研究了该催化剂在H2S选择性催化氧化反应中的活性。结果表明,负载5%V_2O_5的TiO_2-CeO_2柱撑黏土在180℃下催化效果最好,且尾气中不含SO_2。V_2O_5、TiO_2和CeO_2之间的相互作用提高了催化剂的活性,CeO_2提高了催化剂的热稳定性,同时提供大量晶格氧,加强了V_2O_5的氧化还原作用,降低了反应温度;TiO_2加强了VO_x和CeO_x的再氧化,降低了硫酸盐的覆盖率,从而降低了催化剂的失活速率。
The V2O5 supported on TiO_2-CeO_2 pillared clay was synthesized and characterized by XRD, nitrogen adsorption and desorption, TG, FT-IR, H_2-TPR, NH_3-TPD and XPS methods. The effects of the catalyst Activity in H2S Selective Catalytic Oxidation. The results show that the TiO_2-CeO_2 loaded pillared clay with 5% V_2O_5 has the best catalytic activity at 180 ℃ and the exhaust gas does not contain SO_2. The interaction between V 2 O 5, TiO 2 and CeO 2 increased the activity of the catalyst. CeO 2 increased the thermal stability of the catalyst and provided a large amount of lattice oxygen, which enhanced the redox reaction of V 2 O 5 and decreased the reaction temperature. TiO 2 enhanced the VO_x and The reoxidation of CeOx reduces the sulfate coverage and thus the deactivation rate of the catalyst.