期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 2, 页码 956-964出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cp06144j
关键词
-
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB05010300]
- National Natural Science Foundation of China [21407158]
- special fund of the State Key Joint Laboratory of Environment Simulation and Pollution Control [14L02ESPC]
The heterogeneous reactions of SO2 and NH3 on typical mineral oxides were investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). A new sulfate formation pathway was proposed where NH3 accelerated the formation of sulfate species. The results revealed that surface hydroxyls and oxygen played principal roles in the conversion of SO2 to sulfate. It was proposed that NH3 adsorbed onto Lewis acid sites, and hydroxyls and water molecules adsorbed on the surfaces of mineral dust. The enhancement of surface Lewis basicity by NH3 induced more SO2 molecules to adsorb on the surface, which were further oxidized to sulfate by interacting with surface hydroxyls and oxygen atoms. The formation of sulfate, in turn, contributed to the adsorption of NH3, mainly as NH4+ due to enhanced Bronsted acid sites. The IC results showed that the synergistic effect between SO2 and NH3 was more significant on acidic oxides like gamma-Al2O3 and alpha-Fe2O3 compared to basic oxides like MgO.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据