The influence of Ni loading on coke formation in steam reforming of acetic acid

• Published in: Renewable energy Vol. 36; no. 3; pp. 930 - 935
• Main Authors: An, Lu, Dong, Changqing, Yang, Yongping, Zhang, Junjiao, He, Lei
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2011; Elsevier
• Subjects: Acetic acid; Alternative fuels. Production and utilization; Applied sciences; Carbon; Catalysis; Catalysts; catalytic activity; Coke; Coke formation; Deposition; Differential thermal analysis; Energy; Exact sciences and technology; Fuels; Hydrogen; hydrogen production; Nickel; Nickel catalyst; oxidation; Reforming; renewable energy sources; steam; Steam reforming; temperature; thermal analysis; transmission electron microscopy; X-ray photoelectron spectroscopy; Nickel catalyst; Coke formation; Steam reforming; Acetic acid; Hydrogen; Experimental study; Supported catalyst; Coke deposition; Nickel addition; Production; Nickel; Catalyst activity; Alumina; Catalyst support
• ISSN: 0960-1481; 1879-0682
• DOI: 10.1016/j.renene.2010.08.029

Steam reforming of acetic acid on Ni/γ-Al 2O 3 with different nickel loading for hydrogen production was investigated in a tubular reactor at 600 °C, 1 atm, H2O/HAc = 4, and WHSV = 5.01 g-acetic acid/g-cata.h −1. The catalysts were characterized by temperature programmed oxidation (TPO) and differential thermal analysis (DTA), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results showed that the amount of deposited carbidic-like carbon decreased and graphitic-like carbon increased with Ni loading increasing from 9 to 15 wt%. The Ni/γ-Al 2O 3 catalyst with 12 wt% Ni loading had higher catalytic activity and lower coke deposited rate.