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The NiAl mixed oxides: The relation between basicity and SO2 removal capacity

机译：NiAl混合氧化物：碱度与SO2去除能力之间的关系

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摘要

A series of NiAl mixed oxides derived from hydrotalcite-like compounds were prepared by a urea hydrolysis method, and characterized by TGA, XRD, SEM, CO2-TPD, N2 adsorption/desorption and XPS techniques. The SO2 adsorption capacity of the materials correlated closely with their basicity and active oxygen species on the surface, as estimated by a volumetric method. The NiAl mixed oxide with the optimal Ni/Al molar ratio of 3 showed the best performance of SO2 adsorption. Moreover, its adsorption equilibrium of a type I isotherm and pore opening in the quasi-micropore region significantly improve the adsorption performance for low-concentration SO2.
机译：采用尿素水解法制备了一系列类似水滑石的NiAl混合氧化物，并用TGA，XRD，SEM，CO2-TPD，N2吸附/解吸和XPS技术对其进行了表征。材料的SO2吸附能力与它们的碱度和表面活性氧密切相关，如通过体积法估算的那样。最佳的Ni / Al摩尔比为3的NiAl混合氧化物表现出最佳的SO 2吸附性能。而且，它的I型等温线的吸附平衡和准微孔区域的开孔显着提高了低浓度SO2的吸附性能。

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