Affiliation:
1. Catalysis Division CSIR−National Chemical Laboratory Pune India
2. Surface Engineering Division CSIR−National Aerospace Laboratories Bengaluru India
Abstract
AbstractPreferential oxidation of CO (CO‐PROX) in the hydrogen‐rich stream has been carried out over Pt‐NaY catalysts containing various Pt loadings along with Fe, Co, and Au. Catalysts have been characterized with inductively coupled plasma‐atomic emission spectroscopy, Brunauer, Emmett, and Teller surface area, X‐ray diffraction, transmission electron microscopy, X‐ray photoelectron spectroscopy, temperature programmed reduction, and Pt dispersion. CO‐PROX activities and CO oxidation selectivities are observed to increase with an increase in Pt content. Pt‐NaY catalyst with 0.75 wt.% Pt loading shows maximum CO‐PROX activity at low temperatures. An increase in space velocity decreases the CO and O2 conversions, but CO oxidation selectivity increases. A decrease in activity is observed when reformat gas contains around 20% H2O. During the stability test, no change in CO and O2 conversions is observed, but a small increase in the CO oxidation selectivity is noticed after 10 h indicating that the Pt‐NaY catalyst is a promising candidate for CO‐PROX reaction in a hydrogen‐rich stream. The Pt‐Fe‐NaY catalyst shows better activity than the Pt‐NaY catalyst but starts deactivating after 10 h. However, activity is observed to decrease over Pt‐Co‐NaY and Pt‐Au‐NaY catalysts. Pt‐Fe‐NaY catalyst with 0.75 and 0.35 wt.% Pt and Fe, respectively, shows better CO‐PROX activity at a temperature of 75°C.
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献