Open AccessInstallation for the implementation of the supercritical fluid extraction regeneration of nickel-molybdenum catalyst
Author(s) -
М. Р. Хазипов,
I. Z. Akhmetshin,
I L Pastushenko,
А. А. Сагдеев,
А. Т. Галимова
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/537/6/062030
Subject(s) - supercritical fluid , supercritical carbon dioxide , supercritical fluid extraction , catalysis , extraction (chemistry) , supercritical water oxidation , hexane , chemical engineering , dissolution , chemistry , carbon dioxide , chloroform , molybdenum , acetone , materials science , chromatography , inorganic chemistry , organic chemistry , engineering
The process of supercritical fluid extraction recovery of the catalyst at pressures of 10, 20 MPa and temperatures of 343, 373, 433, 473 K with pure supercritical carbon dioxide on the original device has been implemented. An increase in pressure and temperature has a positive effect on the catalyst regeneration process. With increasing pressure increases the density of CO 2 , and, consequently, its dissolving ability. With increasing temperature, the pressure of saturated vapors of compaction products increases and, as a result, their concentration in CO 2 increases. In order to increase the efficiency of the supercritical CO 2 -extraction process for the regeneration of catalyst samples, carbon dioxide modification with various additives (chloroform, dimethylsulfoxide, acetone, ethanol, and non-polar inert with respect to the catalyst composition hexane) was used. Modification of supercritical carbon dioxide with ethanol and hexane at a temperature of 473 K and a pressure of 20 MPa led to an increase in the mass loss of catalyst samples by 12 and 14%, respectively, which indicate the removal of deactivating substances during regeneration by the method of supercritical fluid extraction.