Prevention of defluidization by gas dilution for reactions involving gas–volume reduction

Autor:	Tsutomu Nakazato, Mitsunobu Furukawa, Mitsuyuki Nakajima, Takami Kai
Rok vydání:	2011
Předmět:	Waste management Chemistry General Chemical Engineering General Chemistry Industrial and Manufacturing Engineering Dilution Volumetric flow rate Catalysis chemistry.chemical_compound Chemical engineering Fluidized bed Methanation Carbon dioxide Environmental Chemistry Fluidization Inert gas
Zdroj:	Chemical Engineering Journal. 166:1126-1131
ISSN:	1385-8947
DOI:	10.1016/j.cej.2010.12.045
Popis:	In industrial fluidized bed processes, the system often involved a change in volumetric flow. Defluidization occurs when reactions involving a decrease in gas volume are carried out in a fluidized catalyst bed. This is due to decrease in gas velocity below the minimum fluidization velocity in the emulsion phase. One method to improve fluidization quality is to supply an inert gas with reactant gases: similar effect can be obtained by supplying an excessive amount of one of the reactants. In the present study, the effect of a diluted reactant gas on fluidization quality is quantitatively analyzed by performing CO2 hydrogenation in a fluidized catalyst bed. Stable operation can be established by operating the fluidized bed to avoid the conditions contained in the defluidization zone using two parameters that influence fluidization quality.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::77c65757f351514d07d49fb3f670dfc1 https://doi.org/10.1016/j.cej.2010.12.045 Zobrazit plný text záznamu Full Text from ScienceDirect