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Operation of FCC with mixtures of regenerated and deactivated catalyst
(Elsevier Science, 2001-07)
The operation of FCC with mixtures of coked and regenerated catalyst was studied with a riser simulator reactor on two equilibrium catalysts at 550◦C. The coked catalysts maintain an activity level that enables them to be ...
Simultaneous deactivation by coke and sulfur of Pt-Re(Ge,Sn)/Al2O3 catalysts for n-hexane reforming
(Elsevier Science, 2000-04)
The simultaneous deactivation by coke and sulfur of monometallic Pt/Al2O3 and bimetallic Pt–Re(Ge, Sn)/Al2O3 catalysts was studied using n-hexane reforming as bifunctional test reaction and thiophene as poisoning molecule. ...
Functional nanostructured catalysts based on the niobates to the dry methane reforming and ethylene homologation reactions
(2013-01-01)
Catalytic activity and selectivity of niobate-based nanostructured materials were investigated. Dry methane reforming (DMR) and ethylene homologation reaction (EHR) were selected as test reactions. KSr 2Nb5O15, Sr2NaNb5O ...
Deactivation and regeneration of Cu/SiO2 catalyst in the hydrogenation of maleic anhydride. Kinetic modeling
(Elsevier Science, 2009-10)
In this work, the deactivation of a Cu(10%)/SiO2 catalyst in the gas-phase hydrogenation of maleic anhydride (MA) was studied. The reaction was performed between 170 and 220 °C, at atmospheric pressure and using two contact ...
Gas phase imidazole methylation on zeolites and HPA/SiO2: Study of acid site requirements and catalyst deactivation
(Elsevier Inc, 2013-07)
The gas-phase alkylation of imidazole with methanol was studied at 523 K on solid acids such as HPA/SiO2 and zeolites HMCM22, HBEA, NaY, ZnY and HY. The nature, density and strength of acid sites were determined by temperature ...
Effect Of The Acid-Base Properties Of Mg-Al Mixed Oxides On The Catalyst Deactivation During Aldol Condensation Reactions
(Plapiqui, 2003-12)
The effect of chemical composition of Mg-Al mixed oxides on both the acid-base properties and the deactivation process during the gas phase self-condensation of acetone was studied. The activity and selectivity for acetone ...
Experimental study of the deactivation of Pd on anodized aluminum monoliths during the partial hydrogenation of vegetable oil
(Elsevier Science Sa, 2014-02-14)
Partial hydrogenation of sunflower oil was studied over Pd/Al2O3/Al catalysts in a monolithic stirred reactor. The catalyst showed similar or even better activity and selectivity than conventional Pd/Al2O3 catalysts. ...
Experimental study of the deactivation of Ni/AlMCM-41 catalyst in the direct conversion of ethene to propene
(Elsevier, 2016-12-31)
In this work, an experimental study of the deactivation and regarding a possible regeneration procedure
in the ETP-reaction using Ni/AlMCM-41 (Si/Al = 60) was carried out. ETP experiments at different temperatures
and ...
Isobutane Alkylation with Solid Catalysts based on Beta-Zeolite
(Elsevier Science, 2010-11)
The isobutane alkylation with butenes is a reaction in which the substitution of mineral acids, such as sulphuric and hydrofluoric acids, by solid acid catalysts is highly desirable. Solid catalysts with good activity and ...
Glycerol dehydration catalyzed by MWW zeolites and the changes in the catalyst deactivation caused by porosity modification
(Elsevier B.V., 2015-04-05)
Members of the layered MWW family, including microporous MCM-22, pillared MCM-36 and delaminated ITQ-2 zeolites, were used as catalysts for the gas phase dehydration of glycerol. The chemical, structural and surface ...