نتایج جستجو برای: heterogeneous catalytic

تعداد نتایج: 202404  

Journal: :ACS Sustainable Chemistry & Engineering 2023

Direct valorization of methane via oxidative coupling (OCM) is an encouraging alternative to conventional oil-based processes for the production light hydrocarbons (ethane and ethylene). Abundant, inexpensive simple oxides such as MgO La2O3 possess ability selectively activate methane. However, during OCM, selective conversion ethane following dehydrogenation ethylene are threatened by thermody...

Journal: :Clean-soil Air Water 2021

Diuron is categorized as a probable human carcinogen by the United States Environmental Protection Agency (EPA). This work aimed to determine optimal conditions for catalytic degradation of in an aqueous solution with H2O2 using Algerian sodium Montmorillonite (Mont-Na) catalyst. The material characterized before and after experiment X-ray diffraction, Fourier transform infrared (FTIR) spectros...

Journal: :Current Chemistry Letters 2023

The chemistry of Schiff base has received remarkable attention in different applications, both organic synthesis and industries. Over the past few years many reports have been on synthesis, characterization application vanadium complexes. However, heterogeneous catalysts are active for various oxidation reactions, making catalytic hydrocarbons a great interest. This review summarizes recent dev...

2013
H. Hartati Mardi Santoso Sugeng Triwahyono Didik Prasetyoko

This paper reviews various types of heterogeneous acid-base catalysts for fragrances preparation. Catalytic activities of the various types of heterogeneous acid and base catalysts in fragrances preparation, i.e. nonzeolitic, zeolitic, and mesoporous molecular sieves, have been reported. Generally, heterogeneous acid catalysts are more commonly used in fragrance synthesis as compared to heterog...

Journal: :International Letters of Chemistry, Physics and Astronomy 2016

In the present study, a heterogeneous and homogeneous gas flow dispersion model for simulation and optimization of a large-scale catalytic slurry reactor for the direct synthesis of dimethyl ether (DME) from synthesis gas (syngas) and CO2, using a churn-turbulent regime was developed. In the heterogeneous flow model, the gas phase was distributed into two bubble phases including small and large...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده شیمی 1387

ترکیبات جدید بر اساس هیبرید پلی اکسو متالات ها با پورفیرین ها یا متالوپورفیرین های کاتیونی با هدف پایدار کردن کاتالیست پورفیرین در مقابل واکنش های اکسیداسیون سنتز شد. ترکیبات سنتز شده در این پروژه عبارتند از : پورفیرین های tpyp, tmepy, tbzpzp و کمپلکس شده با فلزات fe(ii), mn(ii) ، و پلی اکسو متالات های (n-bu4n)4h3 {pw11o39}, h3 {pw12 o40} و همچنین هیبریدها {h2tpyp} + (n-bu4n)4 h3{pw11o39} و ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید