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Deactivation of poly(o-aminophenol) film electrodes by storage without use in the supporting electrolyte solution and its comparison with other deactivation processes
(Elsevier, 2015-02)
The effect of storage time without use (STWU) in the supporting electrolyte solution on the conducting properties of poly(o-aminophenol) (POAP) film electrodes was studied. Cyclic voltammetry (CV), rotating disc electrode ...
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 ...
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. ...
Deactivation of poly(o-aminophenol) film electrodes by storage without use in the supporting electrolyte solution and its comparison with other deactivation processes. A study employing EIS
(Springer, 2015-05)
Abstract The effect of storage time without use (STWU) in the supporting electrolyte solution on the charge-trans- port parameters of poly(o-aminophenol) (POAP) film electrodes was studied by electrochemical impedance ...
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 ...
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 ...
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 ...
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 ...
Progress of the Catalytic Deactivation of H-ZSM-5 Zeolite in Glycerol Dehydration
(2021-01-01)
Glycerol conversion into value-added chemicals has received much attention due to the prospect of increasing the biodiesel industry‘s profitability. The dehydration of glycerol is one of the most explored reactions in the ...
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 ...