燃料化学学报Issue(10)：1253-1258,6.
Ni 的引入对 Cu/γ-Al2 O3催化剂上含硫低浓度甲烷燃烧特性的影响
Effect of Ni addition on the catalytic performance of Cu/γ-Al2 O3 in the combustion of lean methane containing SO2
摘要
Abstract
The Cu / γ-Al2 O3 catalyst promoted with Ni was prepared by incipient wetness impregnation and usedin the catalytic combustion of lean methane (3% ) containing SO2(0. 01% ) in a fixed bed reactor; the effect of Ni addition on the catalytic activity of Cu / γ-Al2 O3 and stability against sulfur poisoning in lean methanecombustion was investigated. The results showed that Cu /γ-Al2 O3 catalyst is facilely poisoned by SO2 in the feed gas and its resistance against sulfur poisoning can be effectively improved through the addition of Ni as a promoter. The stability of Cu / γ-Al2 O3 catalyst is increased with the increase of Ni content; over the Cu / γ-Al2 O3 catalyst promoted by 10% Ni, the conversion of CH4 remains above 96% after reaction at 650 ℃ for 10 h. Thecatalysts were characterized by scanning electron microscopy ( SEM), X-ray diffraction ( XRD) and NH3 temperature-programmed desorption (NH3-TPD); the results illustrated that NiAl2 O4 spinel is formed on the Ni-promoted Cu /γ-Al2 O3 catalyst. Upon the formation of NiAl2 O4 spinel, the surface Lewis acidity is reduced, and meanwhile, the adsorption of SO2 is weakened and the retention time of CO2 on the surface is reduced, all thesemay contribute to the high activity and stability against sulfur poisoning of the Ni-promoted Cu /γ-Al2 O3 catalyst in lean methane combustion.关键词
Cu/ γ-Al2 O3催化剂/镍助剂/低浓度甲烷/催化燃烧/硫中毒Key words
Cu / γ-Al2 O3/Ni promoter/lean methane/catalytic combustion/sulfur poisoning分类
能源科技引用本文复制引用
刘建军,杨仲卿,张力..Ni 的引入对 Cu/γ-Al2 O3催化剂上含硫低浓度甲烷燃烧特性的影响[J].燃料化学学报,2014,(10):1253-1258,6.基金项目
国家自然科学基金(51206200) （51206200）
中央高校基本科研业务经费(CDJZR12140031)。 （CDJZR12140031）
