نتایج جستجو برای: reforming reaction
تعداد نتایج: 418205 فیلتر نتایج به سال:
امواج سیکلوترونی الکترون به خاطر چگالی قطعی که دارند، امکان انتشار در پلاسمای فوق چگال همجوشی را ندارند. در اثر فرایند تبدیل مد که برای امواج سیکلوترونی الکترون روی می دهد، امواج برنشتین الکترون بوجود می آیند که چگالی قطع ندارند. بنابراین برای گرم کردن وهدایت جریان در پلاسمای همجوشی مناسب می باشند. در این پایان نامه ضریب تبدیل مد امواج سیکلوترونی به امواج برنشتین الکترون را محاسبه کرده ایم. برا...
CO2 (dry) reforming of methane (DRM) is a significant and useful reaction from the standpoint effective utilization conversion two main greenhouse gases to value-added synthesis gas. To achieve highly efficient stable DRM reaction, Silicalite-1-encapsulated ultrafine Ni nanoparticle catalyst (Ni@S-1)by using phyllosilicate (Ni-PS) as precursor was newly developed. This Ni@S-1 exhibited negligib...
Aqueous-phase reforming (APR) can convert methanol and other oxygenated hydrocarbons to hydrogen carbon dioxide at lower temperatures when compared with the corresponding gas phase process. APR favours water-gas shift (WGS) reaction inhibits alkane formation; moreover, it is a simpler more energy efficient process gas-phase steam reforming. For example, Pt-based catalysts supported on al...
Fuel flexibility is a significant advantage of solid oxide fuel cells (SOFCs) and can be attributed to their high operating temperature. Here we consider a direct internal reforming solid oxide fuel cell setup in which a separate fuel reformer is not required. We construct a multidimensional, detailed model of a planar solid oxide fuel cell, where mass transport in the fuel channel is modeled u...
The Zero Emission Coal Alliance (ZECA) is developing an integrated zero emission process that will generate clean energy carriers (electricity or hydrogen) from coal. The process exothermically gasifies coal using hydrogen to produce a methane rich intermediate state. The methane is subsequently reformed using water and a CaO based sorbent. The sorbent supplies the energy needed to drive the re...
A detailed mechanistic investigation of the early stages of the Paternò-Büchi reaction following 267 nm excitation of benzaldehyde in cyclohexene has been completed using ultrafast, broadband transient UV-visible and IR absorption spectroscopies. Absorption due to electronically excited triplet state benzaldehyde decays on a 80 ps time scale via reaction with cyclohexene. The growth and subsequ...
The complexity and challenges in noncontact temperature measurements inside microwave-heated catalytic reactors are presented in this paper. A custom-designed microwave cavity has been used to focus the microwave field on the catalyst and enable monitoring of the temperature field in 2D. A methodology to study the temperature distribution in the catalytic bed by using a thermal camera in combin...
Glycerin is a potential feedstock for hydrogen production because one mole of glycerin can produce up to four moles of hydrogen. In addition to glycerin, several potential biorenewable feedstocks, such as triglycerides and their derivatives, could be used for hydrogen production. The major challenge in using such feedstocks in a hydrogen-producing reformer is atomizing these viscous feedstocks ...
Tar and substantial CH4 CO2 are contained in gasified fuels, which pose an obstacle to direct chemical synthesis, this is a predominant challenge for biomass gasification technology. Herein, packed−bed dielectric barrier discharge (DBD) reactor was built simultaneous dry reforming tar removal with La−Ni/γ−Al2O3 catalyst. The interaction between plasma catalysis investigated. results indicated t...
Catalytic conversion of biomass-derived oxygenates to fuels and value-added chemicals is a promising strategy in the search for renewable and sustainable energy sources. Most relevant catalytic processes are carried out in an aqueous environment using supported transition-metal catalysts. The reaction network consists of multiple series and parallel pathways leading to formation of hydrogen, al...
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