Formation and decomposition of NH4HSO4 during selective catalytic reduction of NO with NH3 over V2O5-WO3/TiO2 catalysts
Formation and decomposition of NH4HSO4 during selective catalytic reduction of NO with NH3 over V2O5-WO3/TiO2 catalysts
复制标题
V2O5-WO3/TiO2 催化剂上 NH3 选择性催化还原 NO 过程中 NH4HSO4 的形成和分解
DOI：
10.1016/j.fuproc.2016.05.016
复制
发表时间：
2016-09
影响因子：
7.5
通讯作者：
Yang Lin-Jun
中科院分区：
文献类型：
--
作者：
Shi Ya-Juan;Shu Hang;Zhang Yu-Hua;Fan Hong-Mei;Zhang Ya-Ping;Yang Lin-Jun
以工业V2O5-WO3/TiO2催化剂为基础，考察了NH3选择性催化还原NO过程中烟气中SO3、NH3和H2O反应生成的ABS和硫酸铵，导致催化剂失活，细颗粒数浓度增加。用原位漫反射红外光谱仪(DRIFTS)和热重-傅立叶变换红外光谱仪(TG-FTIR)研究了NO/NH3 SCR过程中ABS的生成和分解机理。原位漂移结果表明，在O2存在下，NH3与SO2的吸附活化可在催化剂表面生成ABS。氨气也可与催化剂表面的中间金属硫酸盐直接反应生成。此外，还表明ABS中NO与NH4+的反应促进了ABS的分解。TG-FTIR分析表明，ABS在催化剂上的分解过程分为两步。催化剂推迟了ABS完全热解的温度窗口。
Based on commercial V2O5-WO3/TiO2catalysts, the formations of ammonium bisulfate (ABS) and ammonium sulfate were detected from the reactions among SO3, NH3and H2O in the flue gas during the process of selective catalytic reduction (SCR) of NO with NH3, leading to the deactivation of the catalyst and the increased number concentration of fine particles. The mechanism of formation and decomposition of ABS during SCR of NO with NH3was investigated through the In Situ Diffuse Reflectance Infrared Spectroscopy (DRIFTS) and the Thermo Gravimetric analyzer coupled with Fourier Transform Infrared analyzer (TG-FTIR). The results of the in situ DRIFTS showed that ABS deposited on the surface of the catalysts could be generated from the adsorption activation of NH3with SO2in presence of O2. It also could be produced by the direct reaction between NH3and the intermediate metal sulfates on the surface of the catalysts. In addition, it suggested that the reaction between NO and NH4+in ABS promoted ABS decomposition. TG-FTIR demonstrated that the process of ABS decomposition on the catalysts was composed of two steps. Moreover, the temperature window of the complete pyrolysis of ABS was delayed by catalysts.
登录
查看更多内容
影响因子：
7.4
作者：
J. Menasha;D. Dunn-Rankin;L. Muzio;J. Stallings
通讯作者：
J. Menasha;D. Dunn-Rankin;L. Muzio;J. Stallings
影响因子：
7.3
作者：
Zhenping Zhu;H. Niu;Zhenyu Liu;Shou‐Heng Liu
通讯作者：
Zhenping Zhu;H. Niu;Zhenyu Liu;Shou‐Heng Liu
影响因子：
6.2
作者：
Tonghua Li;C. Lucasius;G. Kateman
通讯作者：
Tonghua Li;C. Lucasius;G. Kateman
影响因子：
15
作者：
C. H. Shomate;B. F. Naylor
通讯作者：
C. H. Shomate;B. F. Naylor
影响因子：
10.9
作者：
Li Jing-hua;Zhang Guien
通讯作者：
Li Jing-hua;Zhang Guien