中文摘要：

采用分步浸渍法制备了以堇青石为载体的Ni-MgO／γ-Al2O3整体式催化剂，在800℃时，以300mL／min N2作为载气，将KCl沉积在催化剂上，考察碱金属盐气溶胶对Ni-MgO／γ-Al2O3整体式催化剂重整净化生物质燃气性能的影响，并利用ICP,BET,XRD和SEM等测试手段对沉积前后的催化剂性能进行表征．结果表明，KCl沉积后的催化剂比表面积降低，催化剂的活性受到影响，CH4转化率降低，H2／CO也略有降低．750℃时，在模拟生物质燃气中添加KCl气溶胶，经过17h，CH4的转化率由88．56％降至32％，重整后H2体积分数由35．09％降至26．74％，CO体积分数由33．19％降至29．78％；而未添加KCl时，经过60h，CH4转化率始终保持在90％左右，重整后各气体组分基本无明显变化．

英文摘要：

Ni-MgO/γ-Al2O3 monolithic catalyst was prepared by a two-step impregnation method. To investigate the deactivation of catalysts by alkali chloride aerosol, a 300 mL/min nitrogen flow containing KCl aerosol particles was led through a catalyst bed at 800℃. The catalysts before and after deposition were characterized by ICP, BET and SEM. The results showed that the activity of the catalysts had decreased due to the reduction of the surface area of the catalyst after deposition of KCl aerosol. Accordingly, the conversion rate of CH4 and H2/CO decreased. Under the reaction condition ofbiomass fuel gas containing KCl aerosol at 750 ℃, the conversion rate of CH4 decreased from 87.24% to 32% after 17 h reaction, besides, volumetric fraction in the outlet gas of H2 decreased from 35.09% to 26.74%, that of CO decreased from 33.19% to 29.78%, however, no deactivation appeared under the condition of biomass fuel gas without KCl aerosol.