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Catalysts 2017, 7(10), 286; doi:10.3390/catal7100286

Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier

Department of Chemical Engineering, Shiraz University, Shiraz 71345, Iran
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Academic Editors: Ewa Kowalska, Marcin Janczarek and Agata Markowska-Szczupak
Received: 3 September 2017 / Revised: 21 September 2017 / Accepted: 22 September 2017 / Published: 25 September 2017
(This article belongs to the Special Issue Nanomaterials for Environmental Purification and Energy Conversion)
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Abstract

In this work, the modification of Ni/SBA-16 oxygen carrier (OC) with yttrium promoter is investigated. The yttrium promoted Ni-based oxygen carrier was synthesized via co-impregnation method and applied in chemical looping steam methane reforming (CL-SMR) process, which is used for the production of clean energy carrier. The reaction temperature (500–750 °C), Y loading (2.5–7.4 wt. %), steam/carbon molar ratio (1–5), Ni loading (10–30 wt. %) and life time of OCs over 16 cycles at 650 °C were studied to investigate and optimize the structure of OC and process temperature with maximizing average methane conversion and hydrogen production yield. The synthesized OCs were characterized by multiples techniques. The results of X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) of reacted OCs showed that the presence of Y particles on the surface of OCs reduces the coke formation. The smaller NiO species were found for the yttrium promoted OC and therefore the distribution of Ni particles was improved. The reduction-oxidation (redox) results revealed that 25Ni-2.5Y/SBA-16 OC has the highest catalytic activity of about 99.83% average CH4 conversion and 85.34% H2 production yield at reduction temperature of 650 °C with the steam to carbon molar ratio of 2. View Full-Text
Keywords: chemical looping reforming of methane; yttrium promoted oxygen carrier; SBA-16; hydrogen production chemical looping reforming of methane; yttrium promoted oxygen carrier; SBA-16; hydrogen production
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MDPI and ACS Style

Daneshmand-Jahromi, S.; Rahimpour, M.R.; Meshksar, M.; Hafizi, A. Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier. Catalysts 2017, 7, 286.

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