An environmentally friendly auxiliary power unit requires catalysts operating in the cyclic mode, producing H2 at a steady rate with high CO2 selectivity and minimum CO clean-up. Here, 1% Pt/CeO2 catalyst was synthesized using the solution combustion synthesis method and investigated toward methane steam reforming reaction. Preliminary tests were performed by varying the steam-to-carbon ratio (S/C), gas hourly space velocity (GHSV), and time-on-stream (TOS). The catalyst showed nearequilibrium CH4 conversion and high H2 concentration (75% dry basis, N2-free) obtained at S/C = 2.8 and GHSV = 24 000 h−1. The catalytic activity was stable after 25 cycles of start-up and shut-down operations, equivalent to 150 h of TOS. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy techniques were used to characterize either the fresh and aged catalyst after 150 h of TOS.

Methane Steam Reforming on the Pt/CeO2 Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst / Amjad, Um-e-Salma; Quintero, Carmen W. Moncada; Ercolino, Giuliana; Italiano, Cristina; Vita, Antonio; Specchia, Stefania. - In: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. - ISSN 0888-5885. - STAMPA. - 58:36(2019), pp. 16395-16406. [10.1021/acs.iecr.9b02436]

Methane Steam Reforming on the Pt/CeO2 Catalyst: Effect of Daily Start-Up and Shut-Down on Long-Term Stability of the Catalyst

Amjad, Um-e-Salma;Quintero, Carmen W. Moncada;Ercolino, Giuliana;Specchia, Stefania
2019

Abstract

An environmentally friendly auxiliary power unit requires catalysts operating in the cyclic mode, producing H2 at a steady rate with high CO2 selectivity and minimum CO clean-up. Here, 1% Pt/CeO2 catalyst was synthesized using the solution combustion synthesis method and investigated toward methane steam reforming reaction. Preliminary tests were performed by varying the steam-to-carbon ratio (S/C), gas hourly space velocity (GHSV), and time-on-stream (TOS). The catalyst showed nearequilibrium CH4 conversion and high H2 concentration (75% dry basis, N2-free) obtained at S/C = 2.8 and GHSV = 24 000 h−1. The catalytic activity was stable after 25 cycles of start-up and shut-down operations, equivalent to 150 h of TOS. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy techniques were used to characterize either the fresh and aged catalyst after 150 h of TOS.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2751353
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