铝酸钙固体碱催化重油裂解联合气化再生性能

采用固相法合成不同n(CaO)/n(Al2O3)的铝酸钙固体碱催化剂，采用N2吸附技术、FT IR、XRD及Hammett指示剂法对其进行了表征。采用双管反应器进行铝酸钙固体碱催化剂催化减压渣油裂解反应和待生剂气化再生，考察了铝酸钙的n(CaO)/n(Al2O3)对其催化减压渣油裂解性能的影响，同时也考察了不同n(CaO)/n(Al2O3)的铝酸钙催化剂待生剂气化性能的差异。结果表明，不同n(CaO)/n(Al2O3) 铝酸钙具有相同的碱强度和不同的总碱量，较低的比表面积和孔容积。n(CaO)/n(Al2O3)=17的铝酸钙固体碱催化剂的催化裂解性能较优，总烯烃和焦炭产率分别达到170%和35%，裂解液主要由汽油和柴油组成。不同n(CaO)/n(Al2O3)的铝酸钙催化剂待生剂的气化性能差异不大。气化所得合成气以H2和CO2为主，体积分数达87%，CH4体积分数少于02%，且H2体积分数达到550%~584%，H2/CO体积比较高。因此，铝酸钙适宜用作同时催化重油裂解和气化制氢的催化剂。

Heavy Oil Catalytic Cracking and Gasification Performance of Calcium Aluminate Solid Base Catalyst

Calcium aluminate solid base catalysts with different n(CaO)/n(Al2O3) were prepared by solid phase method, and characterized by N2 adsorption techniques, FT IR, XRD and Hammett indicators methods. The catalytic cracking of vacuum residue and the gasification regeneration of spent catalyst was performed in a double pipe reactor. The influence of n(CaO)/n(Al2O3) on the vacuum residue cracking performance of calcium aluminate was investigated, and the gasification performance of spent base catalyst was also discussed. The results exhibited that the calcium aluminate catalysts with different n(CaO)/n(Al2O3)  had the same base strength and different total base number, and low specific surface area and pore volume. The calcium aluminate with n(CaO)/n(Al2O3) of 17 had the better cracking performance, with the yields of total olefins and carbon deposited reaching 170% and 35% (mass fraction), respectively, and the cracked liquid mainly composed of gasoline and diesel fraction. The gasification performance of different spent base catalysts was almost the same. The obtained syngas contained H2 and CO2 of up to 87% and CH4 of below 02%(volume fraction), with H2 volume fraction in the range of 550%-584% and higher H2/CO volume ratio. Therefore, calcium aluminate catalyst was suitable for catalyzing both vacuum residue cracking and the gasification.