نتایج جستجو برای: catalytic process

تعداد نتایج: 1379607  

Journal: :Journal of Automated Methods and Management in Chemistry 2008
Satu Ojala Ulla Lassi Paavo Perämäki Riitta L. Keiski

Catalytic oxidation is a feasible and affordable technology for solvent emission abatement. However, finding optimal operation conditions is important, since they are strongly dependent on the application area of VOC incineration. This paper presents the results of the laboratory experiments concerning four most central parameters, that is, effects of concentration, gas hourly space velocity (G...

2012
Ahmad Mashal Mohammad Ahmad Farid Aiouache David Rooney

Many types of advanced oxidation processes (AOPs), namely Fenton (Fe 2+ /H2O2) with different doses, Fenton-like (UV/Fe 2+ /H2O2), photo-Fenton (Fe 2+ /H2O2/TiO2), and plasma technology have been investigated for the removal of organic matters (COD content) from landfill leachate. Fenton's oxidation was the most effective as the most effective ratio 1/10 (Fe 2+ /H2O2) which allow the COD remova...

Journal: :Chemical communications 2011
Bhupesh S Samant George W Kabalka

The palladium-catalyzed trifluoromethylation of aryl bromides has been achieved in micellar media. The micellar conditions result in enhanced yields and are applicable to bromoaromatics with ketone, aldehyde, hydroxyl and amine functionalities.

Journal: :Chemical communications 2013
Loic Stefan Damien Duret Nicolas Spinelli Eric Defrancq David Monchaud

The capability of DNA to acquire enzyme-like properties has led to the emergence of the so-called DNAzyme field; herein, we take a further leap along this nature-inspired road, demonstrating that a template assembled synthetic G-quartet (TASQ) can act as a pre-catalyst for catalytic peroxidase-mimicking oxidation reactions, whatever its nature (guanine or guanosine-based G-quartets), in an ATP-...

2014
Jinhong Zhang Honghong Shan Xiaobo Chen Chunyi Li Chaohe Yang

This paper described the discovering process of some shortcomings of the conventional fluid catalytic cracking (FCC) process and the proposed two-stage riser (TSR) FCC process for decreasing dry gas and coke yields and increasing light oil yield, which has been successfully applied in 12 industrial units. Furthermore, the multifunctional two-stage riser (MFT) FCC process proposed on the basis o...

Journal: :health scope 0
leili mohammadi health promotion research center, zahedan university of medical sciences, zahedan, ir iran edris bazrafshan health promotion research center, zahedan university of medical sciences, zahedan, ir iran; health promotion research center, zahedan university of medical sciences, zahedan, ir iran meissam noroozifar analytical research laboratory, department of chemistry, university of sistan and baluchestan, zahedan, ir iran alireza ansari-moghaddam health promotion research center, zahedan university of medical sciences, zahedan, ir iran

conclusions according to the results, cop is an efficient and rapid method for removing of toluene from aqueous solutions. results the analysis of variance (anova) of the toluene degradation by cop/mgo nanoparticles showed f-value of 19.53 for the quadratic model indicating that the prepared model is significant. the predicted result showed that maximum degradation of toluene (~99.99%) could be...

Journal: :Accounts of chemical research 2004
Varinder K Aggarwal Caroline L Winn

The reaction of sulfur ylides with carbonyl compounds to give epoxides is an important synthetic method. This Account charts the recent advances in rendering this process both asymmetric and catalytic. Two catalytic methods have been developed: the first involving the reaction of a sulfide with an alkyl halide in the presence of a base and aldehyde and the second involving the reaction of a sul...

Abdullah Ahmad Zuhairi Babak Salamatinia Iman Hashemizadeh

Four different alkaline earth metal oxides i.e. MgO, CaO, SrO and BaO were used as heterogeneous catalysts for biodiesel production from palm oil. Effects of critical process variables i.e. reaction time, methanol to oil ratio and temperature were investigated. The results were then fitted to a historical design to study the Analysis of Variance (ANOVA), to characterize interactions between...

Journal: :Organic letters 2000
A M Hafez A E Taggi H Wack W J Drury T Lectka

[structure] A catalytic asymmetric reaction process was designed involving the use of solid-phase reagents and catalysts that constitute the packing of a series of "reaction columns". This process was applied to the catalytic asymmetric synthesis of beta-lactams, yielding pure product after crystallization with exceptional enantio- and diastereoselectivity.

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