Choi, Yi Sun Oh, Kyeongseok Jung, Kwang-Deog Kim, Won-Il Koh, Hyoung Lim 2024-01-19T17:02:12Z 2024-01-19T17:02:12Z 2021-09-02 2020-08 2073-4344 https://pubs.kist.re.kr/handle/201004/118325 Compared with dehydrogenation in conventional petroleum refinery processes, relatively pure hydrogen can be produced by propane dehydrogenation (PDH) without innate contaminants like sulfur and metals. Among the existing catalysts for PDH, Pt catalysts are popular and are often used in conjunction with Sn as a co-catalyst. Coke formation is a major concern in PDH, where catalyst regeneration is typically achieved by periodic coke burning to achieve sustainable operation. In this study, Pt-Sn/Al(2)O(3)catalysts were regenerated after coke burning in three stages: mixing the catalyst with liquid hydrochloric acid, drying, and calcining under air atmosphere. In this process, the optimum concentration of hydrochloric acid was found to be 35%w/w. HCl treatment was effective for enhancing redispersion of the metal catalysts and aiding the formation of the Pt3Sn alloy, which is considered to be effective for PDH reaction. HCl treatment may provide oxychlorination-like conditions under the calcination atmosphere. The characteristics of the catalysts were examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and CO chemisorption. English MDPI PT-SN CATALYSTS PT-SN/AL2O3 CATALYSTS COKE PERFORMANCE ALUMINA SPECTROSCOPY PT-RE/AL2O3 OXIDATION PLATINUM ZIRCONIA Regeneration of Pt-Sn/Al(2)O(3)Catalyst for Hydrogen Production through Propane Dehydrogenation Using Hydrochloric Acid Article 10.3390/catal10080898 1 CATALYSTS, v.10, no.8 CATALYSTS 10 8 scie scopus 000567225200001 2-s2.0-85090667489 Chemistry, Physical Chemistry Article PT-SN CATALYSTS PT-SN/AL2O3 CATALYSTS COKE PERFORMANCE ALUMINA SPECTROSCOPY PT-RE/AL2O3 OXIDATION PLATINUM ZIRCONIA hydrochloric acid treatment propane dehydrogenation Pt-Sn Al2O3 Pt3Sn alloy regeneration