title: Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia.
abstract: A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), N2sorption-desorption, nuclear magnetic resonance (NMR), Inductively Coupled Plasma-Atomic Emission spectrometer (ICP-AES), X-ray absorption spectroscopy (XPS), Temperature-programmed desorption of ammonia (NH3-TPD), Ultraviolet visible diffuse reflectance spectroscopy (UV-Vis DRS) and Temperature programmed reduction (TPR). The analysis results indicate that the high activities of Cu-SAPO-34 catalysts could be attributed to the enhancement of redox property, the formation of mesopores and the more acid sites. Furthermore, the kinetic results verify that the formation of mesopores remarkably reduces diffusion resistance and then improves the accessibility of reactants to catalytically active sites. The 1.0-Cu-SAPO-34 catalyst exhibited the high NO conversion (>90%) among the wide activity temperature window in the range of 150-425°C.
authors.affiliation: State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Changping, Beijing 102249, P. R. China. Electronic address: 670058003@qq.com.
authors.forename: Jixing
authors.initials: J
authors.lastname: Liu
authors.affiliation: Shandong Hengsheng Chemical Co., Ltd., Shandong 253024, China.
authors.forename: Fuhong
authors.initials: F
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Changping, Beijing 102249, P. R. China. Electronic address: liujian@cup.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.affiliation: Shandong Hengsheng Chemical Co., Ltd., Shandong 253024, China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Changping, Beijing 102249, P. R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Changping, Beijing 102249, P. R. China.
authors.forename: Yuechang
authors.initials: Y
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Changping, Beijing 102249, P. R. China.
authors.forename: Qianyao
authors.initials: Q
authors.lastname: Sun
mesh_terms: D000641:Ammonia / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D016062:Porosity; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D017641:Zeolites; D009569:Nitric Oxide; D000641:Ammonia; D003300:Copper
keywords: Cu-SAPO-34; Diffusion resistance; Kinetic; NOx; Selective catalytic reduction