نتایج جستجو برای: co preferential oxidation

تعداد نتایج: 462102  

Journal: :Angewandte Chemie 2008
Michael E Grass Yawen Zhang Derek R Butcher Jeong Y Park Yimin Li Hendrik Bluhm Kaitlin M Bratlie Tianfu Zhang Gabor A Somorjai

Carbon monoxide oxidation is one of the most studied heterogeneous reactions, being scientifically and industrially important, particularly for removal of CO from exhaust streams and preferential oxidation for hydrogen purification in fuel-cell applications. The precious metals Ru, Rh, Pd, Pt, and Au are most commonly used for this reaction because of their high activity and stability. Despite ...

Journal: :Biochemical Society transactions 1985
P Moldéus D Ross R Larsson

Co-oxidation of xenobiotics has been shown t o occur during prostaglandin synthase (PGS)-catalysed synthesis of prostaglandins (Marnett. 198 I ; EIing et al.. 1983; Marnett & Eling. 1983). PGS catalyses the oxygenation of polyunsaturated fatty acids to hydroxy endoperoxides (e.g. PGH2). The most important substrate in vivo is arachidonic acid (AA) . PGS contains two activities: the fatty acid c...

In this study, Nd-doped cobalt oxide (Nd-Co3O4) nanoparticles were prepared by a combustion synthesis procedure using Co(acac)3 complex. The nanoparticles were characterized by infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Then, the effect of Nd-Co3O4 ...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
esmail ataei salehi reza esmaeilzadeh kenari s. tahereh nasiri takami

compounds derived from lipid oxidation endangering human health and lead to cardiovascular disease and cancer. the addition of antioxidants is effective in retarding the oxidation of lipids and lipid containing foods. due to the toxicological effects of synthetic antioxidants, decrease their use and replacing them with natural antioxidants. this study investigates antioxidant effect of pimpinel...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
layla abadian azim malekzadeh abbas ali khodadadi yadollah mortazavi

catalysts with the formula of laco(1+x)o(3+δ), where 0 ≤ x ≤ 1, were studied for oxidation of co and c2h6 in a synthetic exhaust gas, comprising 6.0 % co and 0.2 % c2h6 in ar. ethane was selected as a model for hydrocarbons in the exhaust gas. the performance of catalysts is correlated to their properties, particularly their redox in oxidizing and reducing atmospheres. xrd patterns show perovsk...

Journal: :Microporous and Mesoporous Materials 2021

In the present work, SBA-15 and SBA-16 ordered mesoporous silicas were synthesized with different morphologies such as fibers, spheres, rods irregular shapes. Copper cerium oxides active phase was introduced by two methods, incipient wetness impregnation solid-state using a ball mill. The obtained catalysts evaluated in CO preferential oxidation reaction (COPrOx). By means of SAXS, XRD, SEM TEM...

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