Results
repositories = "University of Twente Publications"
The effect of thermal annealing on the properties of alumina films prepared by metal organic chemical vapour deposition at atmospheric pressure
Description :
Thin films deposited at 330°C by metal organic chemical vapour deposition on stainless steel, type AISI 304, were annealed in a nitrogen atmosphere for 1, 2 and 4 h at 600, 700 and 800°C. The film properties, including the protection of the underlying substrate against high temperature corrosion, th...
Repository :
University of Twente Publications
Language(s) :
Undetermined
The corrosion and mechanical behaviours of Al, FeCrAlY, and CoCrAlY coatings in aggressive environments
Description :
The mechanical and chemical behaviours of aluminide coatings applied by pack cementation, FeCrAlY coatings applied by plasma spraying and CoCrAlY coatings applied by electrodeposition were studied. The coatings were pretreated for 0.5 h in argon at 1373 K to improve the adhesion and structural homog...
Repository :
University of Twente Publications
Language(s) :
Undetermined
The influence of extraframework aluminum on H-FAU catalyzed cracking of light alkanes
Description :
The conversion of light linear and branched alkanes on two faujasite samples containing different concentrations of free Brønsted acid sites and extraframework alumina (EFAL) was studied between 733 K and 813 K. Protolytic cracking and bimolecular hydride transfer proceeded solely on Brønsted acid s...
Repository :
University of Twente Publications
Language(s) :
Undetermined
The catalytic conversion of natural gas to useful products
Description :
This paper gives a brief summary of some processes, direct and indirect, for the conversion of natural gas to useful products. It then proceeds to give an outline of some work from the authors' laboratories on subjects such as steam reforming, oxidative coupling and CO2 reforming of methane, paying ...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Selectivity Enhancement in Methylamine Synthesis via Postsynthesis Modification of Brønsted Acidic Mordenite
Description :
Methylamine synthesis from methanol and ammonia over parent and modified Brønsted acidic mordenites is studied byin situinfrared spectroscopy and kinetic analysis to elucidate the role of elementary steps for activity and selectivity.In situinfrared spectroscopy reveals that all methylammonium ions ...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Nickel catalysts for internal reforming in molten carbonate fuel cells
Description :
Natural gas may be used instead of hydrogen as fuel for the molten carbonate fuel cell (MCFC) by steam reforming the natural gas inside the MCFC, using a nickel catalyst (internal reforming). The severe conditions inside the MCFC, however, require that the catalyst has a very high stability. In orde...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Synthesis and characterization of mesoporic materials containing highly dispersed cobalt
Description :
Highly dispersed Co particles in MCM-41 were prepared by direct addition of CoCl2 to the synthesis gel. The small clusters of Co did not sinter during reduction and sulfidation. Incorporation of Co into the MCM-41 lattice was not observed. The addition of Co to the synthesis gel did not alter the st...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Infra-red studies of the surface acidity of oxides and zeolites using adsorbed probe molecular
Description :
The use of infrared spectroscopy to probe the surface acidity of oxides and molecular sieves is reviewed. The experimental requirements and the type and nature of probe molecules available are also discussed. Special emphasis is given to the criteria that have to be met to arrive at a characterizati...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Oxidative dehydrogenation of propane over niobia supported vanadium oxide catalysts
Description :
Oxidative dehydrogenation (ODH) of propane is examined over a series of catalysts, which include Nb2O5 supported monolayer V2O5 catalysts, bulk vanadia-niobia with different vanadium oxide loadings and prepared by four different methods, V2O5and Nb2O5. The intrinsic activity (TOF) of the samples stu...
Repository :
University of Twente Publications
Language(s) :
Undetermined
Hydrogen/Deuterium Exchange duringn-Butane Conversion on H-ZSM-5
Author(s) :
Narbeshuber, Thomas F.
,
Stockenhuber, Michael
,
Brait, Axel
,
Seshan, Kulathuiyer
,
Lercher, Johannes A.
Description :
Steady-state isotope tracer studies and isotope transient response experiments ofn-butane conversion on H-ZSM-5 (Si/Al = 35) were carried out between 673 and 823 K. Among the three main reactions, the rate of H/D-exchange is at least one order of magnitude higher compared to the rates of cracking or...
Repository :
University of Twente Publications
Language(s) :
Undetermined