A COMPARATIVE SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATIONS OF NI/AL2O3 NANOCATALYST VIA SEQUENTIAL IMPREGNATION AND SOL-GEL METHODS USED FOR DRY REFORMING OF METHANE

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SHARIFI MAHDI; HAGHIGHI MOHAMMAD; RAHEMI NADER; RAHMANI FARHAD

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Journal: PETROLEUM RESEARCH Year:2017 | Volume:27 | Issue:93 Page(s): 146-159

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Title

A COMPARATIVE SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATIONS OF NI/AL2O3 NANOCATALYST VIA SEQUENTIAL IMPREGNATION AND SOL-GEL METHODS USED FOR DRY REFORMING OF METHANE

Author(s)

SHARIFI MAHDI | HAGHIGHI MOHAMMAD | RAHEMI NADER | RAHMANI FARHAD | Issue Writer Certificate

Keywords

NI/AL2O3 NANOCATALYSTQ2

IMPREGNATIONQ2

SOL-GELQ1

DRY REFORMINGQ2

SYNTHESIS GASQ2

Abstract

The use of Biogas as a feed for DRY REFORMING of methane has many environmental and economical advantages. Despite the high activity and low cost of Ni/Al2O3 catalyst, it shows pour stability due to coke deposition and active phase sintering. In this study, the effect of the synthesis method (impregnation vs. SOL-GEL) was evaluated on (1) physicochemical properties, (2) activity and (3) stability of Ni/Al2O3 catalyst. Extraction of physicochemical properties of nano catalysts by XRD, FESEM, FTIR, BET, PSD and TG-DTG showed that the SOL-GEL method produced amorphous phases, uniform nanoparticles´ distribution and a higher surface area in comparison with IMPREGNATION method. FTIR analysis confirmed the existence of desired functional groups and lack of spinel compounds which were in agreement with XRD analysis. PSD analysis (<60 nm) demonstrated the promotion of Ni/Al2O3 catalyst by SOL-GEL method synthesis. Therefore, it can be found that preparation method had a great influence on physicochemical properties of catalyst; such as, crystallinity, surface area and morphology. The performances of catalysts were evaluated at atmospheric pressure, feed gas ratio of CO2/CH4=1, GHSV=24 l/g.h and temperature ranges from 550 to 850°C. The stability test also was performed at °850C for 24 h. The results revealed that the synthesized catalyst by SOL-GEL method had better performances. The excellent syngas ratio (0.99) had been produced only by SOL-GEL synthesized Ni/Al2O3 nano catalyst; besides, its activity loss was less than the nano catalyst synthesized using IMPREGNATION method.

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APA: Copy

SHARIFI, MAHDI, HAGHIGHI, MOHAMMAD, RAHEMI, NADER, & RAHMANI, FARHAD. (2017). A COMPARATIVE SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATIONS OF NI/AL₂O₃ NANOCATALYST VIA SEQUENTIAL IMPREGNATION AND SOL-GEL METHODS USED FOR DRY REFORMING OF METHANE. PETROLEUM RESEARCH, 27(93 ), 146-159. SID. https://sid.ir/paper/114882/en

Vancouver: Copy

SHARIFI MAHDI, HAGHIGHI MOHAMMAD, RAHEMI NADER, RAHMANI FARHAD. A COMPARATIVE SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATIONS OF NI/AL₂O₃ NANOCATALYST VIA SEQUENTIAL IMPREGNATION AND SOL-GEL METHODS USED FOR DRY REFORMING OF METHANE. PETROLEUM RESEARCH[Internet]. 2017;27(93 ):146-159. Available from: https://sid.ir/paper/114882/en

IEEE: Copy

MAHDI SHARIFI, MOHAMMAD HAGHIGHI, NADER RAHEMI, and FARHAD RAHMANI, “A COMPARATIVE SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATIONS OF NI/AL₂O₃ NANOCATALYST VIA SEQUENTIAL IMPREGNATION AND SOL-GEL METHODS USED FOR DRY REFORMING OF METHANE,” PETROLEUM RESEARCH, vol. 27, no. 93 , pp. 146–159, 2017, [Online]. Available: https://sid.ir/paper/114882/en

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