炭化温度对多孔炭涂覆蜂窝陶瓷整体式催化剂的影响

Effect of Carbonization Temperature on Porous Carbon Coated Honeycomb Ceramic Monolithic Catalyst

以糠醇树脂为炭前驱体,在不同炭化温度下制备出系列涂层型多孔炭涂覆蜂窝陶瓷整体式催化剂。N2-物理吸附和程序升温脱附(TPD)的表征结果表明,炭化温度对多孔炭涂层的物理-化学性质均有较大影响,随着炭化温度升高,多孔炭涂层孔结构的形成趋于完全,同时涂层表面酸性含氧基团的种类和数量逐渐减少,800℃时多孔炭涂层孔结构完全形成,且表面酸性含氧基团也基本消失。1,1,2,2-四氯乙烷气相催化脱HCl合成1,1,2-三氯乙烯反应评价结果表明,孔结构和表面酸性含氧基团是影响多孔炭催化性能的关键因素,800℃炭化的多孔炭涂覆蜂窝陶瓷整体式催化剂的催化活性、选择性和稳定性最佳。

The series coating type porous carbon coated honeycomb ceramic monolithic catalysts with furfuryl alcohol resin as carbon precursor were carbonized at different carbonization temperatures. Characterization results by N2-physisorption and temperature programmed desorption(TPD) showed that carbonization temperature resulted in great effect on the physico-chemical property, as the enhancement of carbonization temperature, the pore structure formation of porous carbon coating tends to be complete, and the species and quality of surface acid oxygen groups are decreased significantly, at the 800 ℃ carbonization temperature condition, the pore structure forms completely, the surface acid oxygen groups disappear basically as well. The reaction evaluation results of the 1,1,2,2-tetrachloroethane vapor phase catalytic removal of HCl to compound1,1,2-trichloroethylene showed that the pore structure and surface acid oxygen groups were key factors that affect catalytic performance of porous carbon, the catalytic activity, selectivity and stability of porous carbon coated honeycomb ceramic monolithic catalyst was carbonized at 800 ℃ was best.