NDLI: Studies on the Selective Catalytic Reduction of NO by Propylene over MCM-41 Supported Pt Catalyst

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Studies on the Selective Catalytic Reduction of NO by Propylene over MCM-41 Supported Pt Catalyst

Content Provider	Semantic Scholar
Author	Han, Sang-Hyeon Yang, Jae-Seung Jeong, Seok-Jin
Copyright Year	2000
Abstract	− At present study, platinum doped MCM-41(Si/Al=40) catalyst, which has been widely used as a new type of meso-porous catalyst, was tested for the reduction of NO x with propylene as reducing agent. In order to confirm the structure, various characterization techniques such as XRD, N 2 adsorption-desorption isotherms, NO-TPD, and BET surface area measurements were performed. Also, by using a simulated flow gas mixture, NO reduction activity test was carried out on various kind of catalyst such as Pt/MCM-41, Pt/Al-MCM-41 and Pt-ZSM-5. The general trends of activity measurements showed that the maximum NO conversions appeared at relatively lower temperature region(low than 250 C) probably due to the existence of Pt on support. This is supported by the existence of larger peaks at lower temperature region from TPD pattern, when compared with that of MCM-41 only. Specially Al exchanged MCM-41 showed the best NO conversion activity than others. It is speculated that the exchanged Al sites give rise to additional active site for NO adsorption, becau se Al-MCM-41 shows a larger hystersis loop in adsorption-desorption isotherms. 10 vol wt% water was added to the stimulated flow gases, but the NO cnoversion activity was not changed significantly on Pt/Al-MCM-41. Therefore, newly proposed Pt/MCM-41 catalyst might be a better candate for the practical use in SCR process using propylene than on conventional Me-ZSM-5 catalysts.
Starting Page	578
Ending Page	578
Page Count	1
File Format	PDF HTM / HTML
Volume Number	38
Alternate Webpage(s)	https://www.cheric.org/PDF/HHKH/HK38/HK38-5-0578.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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