نتایج جستجو برای: hybrid catalysts

تعداد نتایج: 223194  

Journal: :journal of physical & theoretical chemistry 2008
omid moradi mohammad yari s. sedaghat

in this research we used heavy propylene tetramer (hpt) and a1c13 —bf3 (lewis acids) ascatalyst and ethanol, n-propanol and n-butanol as co-catalyst. using lewis acids as catalyst, thehpts form molecules with higher molecular weight. since the raw materials of the reaction are byproducts of other reactions, are not pure and contain various compounds with different m.w andalso different chemical...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2009
ahmad tavasoli mohammad irani ali nakhaeipour yadollah mortazavi abas ali khodadadi

the potential of carbon nanotubes (cnt) supported cobalt catalysts for fischer-tropsch (ft) reaction is shown. using the wet impregnation method cobalt on carbon nanotubes catalysts were prepared with cobalt loading varying from 15 to 45 wt. %. the catalysts are characterized by different methods including: bet physisorption, x-ray diffraction, hydrogen chemisorption, and temperature-programmed...

Journal: :polyolefins journal 0
valentina nikolaevna panchenko boreskov institute of catalysis sb ras, prospekt akad. lavrentieva 5, 630090, novosibirsk, russian federation ludmila viktorovna vorontsova boreskov institute of catalysis sb ras, prospekt akad. lavrentieva 5, 630090, novosibirsk, russian federation vladimir aleksandrovich zakharov boreskov institute of catalysis sb ras, prospekt akad. lavrentieva 5, 630090, novosibirsk, russian federation

the interaction of the external donor (propyltrimethoxysilane - ptms) with titanium-magnesium catalysts (tmcs) containing dibutylphthalate (dbp) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared diffuse reflectance spectroscopy (drifts). the chemical composition of the catalysts after their interaction with heptane solutions of ptms, ptms/al...

2017
C Kavitha K Bramhaiah Neena S John Shantanu Aggarwal

Reduced graphene oxide-osmium (rGO-Os) hybrid nano dendtrites have been prepared by simple liquid/liquid interface method for the first time. The method involves the introduction of phase-transfered metal organic precursor in toluene phase and GO dispersion in the aqueous phase along with hydrazine hydrate as the reducing agent. Dendritic networks of Os nanoparticles and their aggregates decora...

Journal: :Chinese Journal of Catalysis 2021

The two major challenges in industrial enzymatic catalysis are the limited number of chemical reaction types that catalyzed by enzymes and instability under harsh conditions catalysis. Expanding enzyme to a larger substrate scope greater variety reactions tuning microenvironment surrounding molecules achieve high performance urgently needed. In this account, we focus on our efforts using de nov...

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