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3 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

3 2002

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Selectivity of zeolites in n-paraffins hydroisomerization process.

Walendziewski J., Pniak B., Grzechowiak J.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

329-335

The hydroisomerization of the cetane fraction of n-paraffins over a series of prepd. zeolite-based platinum catalysts was studied. The hydrocracking activity of dealuminated H-b and ZSM-5 zeolites was too high. H-mordenite, NiNaY, and SAPO-11 containing catalysts gave better isomerization selectivities.

Iron oxide-alumina aerogel catalysts in Fischer-Tropsch synthesis.

Steininger M., Stolarski M., Walendziewski J., Pniak B.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

277-284

Aerogel iron oxide (10, 30, 50 and 100 wt % of iron)-alumina based catalysts were prepared by: (I) co-gelation of alumina sol and complex iron compound followed by drying of the prepared gels under supercritical condition and (II) impregnation of the calcined alumina aerogel with isopropanol iron complex compound solution followed by drying of the obtained product under supercritical conditions and calcination. The influence of aerogel synthesis parameters on bulk density, total specific surface area and pore volume as well as activity of the obtained aerogel catalysts in Fischer-Tropsch synthesis was determined.

Hydroconversion of cetane fraction over molybdenum catalysts.

Walendziewski J., Pniak B., Sayag C., Grzechowiak J.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

355-360

Carbonization with methane-H2 mixturure and/or hydrogen reduction of 32% MoO3/Al2O3 catalysts gives low activity isomerization catalysts of moderate selectivity, by far lower than it was found for non-supported catalysts described in literature. The main products of isomerization process in the presence of carbonized and reduced catalysts molybdenum catalysts are mono-branched isomers. The hypothetical reason of considerably lower activity of alumina supported molybdenum catalysts in isomerization reaction in comparison to the non-supported ones is reaction of molybdenum compounds with alumina and therefore lower susceptibility of molybdenum for carbonization.