Fe/Beta@SBA‐15 core‐shell catalyst: Interface stable effect and propene poisoning resistance for no abatement. Issue 11 (28th July 2018)

• Record Type: Journal Article
• Authors: Liu, Jixing; Liu, Jian; Zhao, Zhen; Tan, Junbin; Wei, Yuechang; Song, Weiyu
• Is Part Of: AIChE journal. Volume 64:Issue 11(2018)
• Page Start: 3967
• Page End: 3978
• Publication Date: 2018-07-28
• Subjects: core‐shell -- selective catalytic reduction -- propene resistance -- kinetics -- in situ diffuse reflectance infrared Fourier transform spectra; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.16210
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : A series of Fe/Beta@SBA‐15 core‐shell structural catalysts were designed and controllablly constructed by an ultradilute liquid‐phase coating method. Their catalytic activities were examined for ammonia selective catalytic reduction of NOx . It was found that their acidity and redox property were strongly dependent on SBA‐15 shells, Fe/Beta@SBA‐15 catalysts exhibit good propene and SO2 poisoning resistance, excellent hydrothermal stability, and wide NOx conversion temperature range (325–600°C) under a high gas hour space velocity. The kinetics results indicate that the mesoporous structure of SBA‐15 shell lowers the diffusion limitation and promotes the reactants accessing to active sites. Moreover, TGA and in situ DRIFT results reveal that SBA‐15 shell can not only prevent the generation and deposition of coke and nitrate species from blocking active sites but also serve as an effective "obstacle" to inhibit active FeOx nanoparticles from agglomerating at high temperature, leading to the higher propene resistance than Fe/Beta. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3967–3978, 2018