2018•2018 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET)Requires access
Poisoning Effects of P and Zn on Commercial NH3-SCR V2O5-MoO3/TiO2 Catalyst
Zulfiqar Ali, Qiang Lü, Tahir Iqbal, Sajida Riffat Laraib, Zulqarnain Arain, Manoj Kumar Panjwani, Muhammad Usman Tahir, Muhammad Asif
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Abstract
The purpose of this study is to investigate the poisoning effects of Phosphorus (P) and Zinc (Z) over commercial NH3-SCR V2O5-MoO3/TiO2with realistic concentrations, used in coal-fired power plant. The catalyst is poisoned by two different methods, incipient wetness impregnation, and solid diffusion method and then characterized by NH3-Temperature Programmed Desorption (NH3-TPD) and H2-Temperature Programmed Reduction (H2-TPR). The results show that P and Zn had poisoning effects over V2O5-MoO3/TiO2when poisoned by Incipient Wetness Impregnation method, but there are negligible poisoning effects when poisoned by solid diffusion. On the other hand, P has comparatively more poisoning effects as compared to Zn in both poisoning methods. NH3-TPD and H2-TPR tests indicate that the ammonia desorption curves for P and Zn poisoned catalysts using incipient wetness impregnation method are shifted towards lower ammonia desorption, while the vanadium V active component is reduced from V5+to V4+which has been observed to causes the deactivation of the catalyst.