Deactivation and regeneration of a promoted transition-metal-zeolite catalyst

Autor:	Sidney S. Pollack, Henry W. Pennline
Rok vydání:	1986
Předmět:	inorganic chemicals chemistry.chemical_classification Hydrogen Inorganic chemistry General Engineering chemistry.chemical_element General Medicine Chemical reaction Catalysis chemistry.chemical_compound chemistry Compounds of carbon Zeolite Cobalt Carbon monoxide Syngas
Zdroj:	Industrial & Engineering Chemistry Product Research and Development. 25:11-14
ISSN:	1541-4841 0196-4321
Popis:	The regeneration of a promoted transition-metal-zeolite catalyst that had been used to convert synthesis gas to gasoline-range hydrocarbons was investigated in a mixed reactor system. Carbonaceous deposits were found on the catalyst-a coprecipitated cobalt-thoria admixed with ZSM-5 zeolite-after it has been subjected to low hydrogen to carbon monoxide ratio synthesis gas at the processing conditions. Oxidative regenerations did not succeed in returning the catalyst to its initial synthesis activity. X-ray diffraction analysis of the used and regenerated catalyst samples suggested that sintering of the cobalt occurred. The crystallite size of the Co/sub 3/O/sub 4/ formed after regeneration was inversely related to the synthesis gas conversion after reduction of the Co/sub 3/O/sub 4/ to the metal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::913d490bef7ebfc9ad8112ef3bff7002 https://doi.org/10.1021/i300021a003 Zobrazit plný text záznamu