Effect of boron on the stability of Ni catalysts during steam methane reforming |
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| Authors: | Jing Xu Luwei Chen Kong Fei Tan Armando Borgna Mark Saeys |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576, Singapore;2. Institute of Chemical and Engineering Sciences, A*STAR (Agency for Science, Technology and Research), 1 Pesek Road, Jurong Island, Singapore 627833, Singapore;1. Dipartimento di Ingegneria Civile, Chimica e Ambientale, Laboratorio di Chimica delle Superfici e Catalisi Industriale, Università di Genova, P.le J.F. Kennedy 1, I-16129, Genova, Italy;2. Department of Chemical and Biological Engineering, Tufts University, Medford, MA, USA;3. Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, I-16146 Genova, Italy;4. Departamento de Quimica Inorganica, Universidad de Salamanca, Salamanca, Spain;1. Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty of Engineering, University of Kashan, Kashan, Iran;2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran;1. Politecnico di Milano, Dipartimento di Energia, Via Lambruschini 4, 20156 Milano, Italy;2. Multiphase Reactors, Chemical Process Intensification, Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands |
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| Abstract: | Ni catalysts promoted with 0.5 and 1.0 wt% boron were synthesized, characterized and tested during steam methane reforming, to evaluate the effect of boron on the deactivation behavior. Boron adsorbs on the γ-Al2O3 support and on the Ni particles and 1.0 wt% boron is found to enhance the stability without compromising the activity. Catalytic studies at 800 °C, 1 atm, a stoichiometric methane to steam ratio, and space velocities of 330,000 cm3/(h gcat) show that promotion with 1.0 wt% boron reduces the rate of deactivation by a factor of 3 and increases the initial methane conversion from 56% for the unpromoted catalyst to 61%. Temperature-programmed oxidation (TPO) and scanning electron microscopy (SEM) studies confirm the formation of carbonaceous deposits and illustrate that 1.0 wt% boron reduces the amount of deposited carbon by 80%. |
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