نتایج جستجو برای: selectivity of products

تعداد نتایج: 21179743  

Journal: :Chemical communications 2005
Dae Jung Kim Brian C Dunn Paul Cole Greg Turpin Richard D Ernst Ronald J Pugmire Min Kang Ji Man Kim Edward M Eyring

The silylation of SBA-15 enhances the reducibility of cobalt oxides on a SBA-15 supported cobalt catalyst, and consequently increases the catalytic activity for Fischer-Tropsch synthesis of hydrocarbons from syngas and selectivity for longer chain products.

Journal: :Chemical communications 2010
Ine I F Boogaerts Daniel F S White David J Cole-Hamilton

The hydrocarbonylation of alkenes, including allyl alcohol, catalysed by rhodium complexes and wide angle bidentate ligands together with PEt(3), gives alcohols as the primary products with high chemo and regio-selectivity.

Journal: :Chemical communications 2013
Peng Wang Saihu Liao Sunewang R Wang Run-Duo Gao Yong Tang

The unprecedented reaction of trisubstituted alkenes with iron porphyrin carbenes has been successfully developed. Both multiply substituted 1,3-butadiene and cyclopentadiene products are readily accessible with high efficiency and selectivity in good yields.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
zahra shiri-yekta mohammad reza yaftian

two n4-type schiff base ligands named n,n'-bis(2-pyridylmethylidene)-1,2-diiminoethane (l1) and n,n'-bis(2-pyridylmethylidene)-1,3-diiminopropane (l2) have been synthesized by the reaction of pyridine-2-carbaldehyde with ethylenediamine and propylenediamine, respectively. the binding abilities of l1 and l2 in dichloromethane towards cu2+, cd2+, co2+, ni2+, zn2+ and pb2+ ions were evaluated by p...

Co-precipitated Cu-MgO catalysts were prepared and evaluated for the gas-phase hydrogenation of furfural. The effect of heating rate at the calcination step was studied by comparing the performance of three catalysts prepared via the same procedure but calcined at different heating rates. The results established that altering the heating rate could influence the structural properties of the cat...

Journal: :Chemical communications 2013
Yoshihiro Miyake Shin-ichi Ota Masashi Shibata Kazunari Nakajima Yoshiaki Nishibayashi

Reactions of propargylic halides with trifluoromethyltrimethylsilane in the presence of a catalytic amount of copper(I) thiophene-2-carboxylate (CuTC) have been found to give the corresponding trifluoromethylated products in good to high yields with a high selectivity.

Journal: :Angewandte Chemie 2016
Anna Loiudice Peter Lobaccaro Esmail A Kamali Timothy Thao Brandon H Huang Joel W Ager Raffaella Buonsanti

Favoring the CO2 reduction reaction (CO2RR) over the hydrogen evolution reaction and controlling the selectivity towards multicarbon products are currently major scientific challenges in sustainable energy research. It is known that the morphology of the catalyst can modulate catalytic activity and selectivity, yet this remains a relatively underexplored area in electrochemical CO2 reduction. H...

The Fischer-Tropsch synthesis is a catalytic process that can produce a fuel similar to fossil fuels by using primary sources such as agricultural waste and carbon sources that can convert into synthesis gas by superheated steam. All fuel derivatives can be supplied through the Fischer-Tropsch reaction. The synthesis produces a variety of hydrocarbons via parallel and sequential reactions. Howe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده ادبیات و علوم انسانی 1391

1.1 introduction “i see translation as the attempt to produce a text so transparent that it does not seem to be translated. a good translation is like a pane of glass. you only notice that it’s there when there are little imperfections- scratches, bubbles. ideally, there shouldn’t be any. it should never call attention to itself.” “norman shapiro” (venuti, 1995:1) edward fitzgerald is the br...

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