نتایج جستجو برای: gas mixture

تعداد نتایج: 331788  

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

carbon nanotubes (cnts), nowadays, are one of the important nanomaterials that can be produce with different methods such as chemical vapor deposition (cvd). growing of cnts via cvd method can be influenced by several operating parameters that can affect their quality and quantity. in this article, the effects of inlet gas mixture temperature on cnt’s local growth rate, total production, and le...

Carbon nanotubes (CNTs), nowadays, are one of the important nanomaterials that can be produce with different methods such as chemical vapor deposition (CVD). Growing of CNTs via CVD method can be influenced by several operating parameters that can affect their quality and quantity. In this article, the effects of inlet gas mixture temperature on CNT’s local growth rate, total production, and le...

سبحانیان, صمد, صادقی, نادر, نقش‌آرا, حمید,

In this paper, the resonance optical absorption method, is used to measure the Cu atoms number density in different power levels of power supply. Atoms are sputtered from a Cu target during plasma magnetron sputtering deposition. For the light source, a commercial Cu hollow cathode lamp is used. For measurement of gas temperature, a small percentage of N2 is added to the gas mixture and the gas...

Journal: :gas processing 0
farshad varaminian school of chemical, gas and petroleum engineering, semnan university, iran hadi behjati rad school of chemical, gas and petroleum engineering, semnan university, iran

abstract: â in this study, the change in the crystalline structure of gas hydrate was predicted for ternary mixture of methane-ethane-water. for this purpose, the tangent plane distance (tpd) minimization method was used. first, the calculations were performed for the binary mixtures of methane-water and ethane-water as the gas and liquid phases. the results show that for a binary mixture of th...

Journal: :The Journal of General Physiology 1958
Jonathan B. Wittenberg

The composition of the gas mixture secreted into the swim-bladders of several species of fish has been determined in the mass spectrometer. The secreted gas differed greatly from the gas mixture breathed by the fish in the relative proportions of the chemically inert gases, argon, neon, helium, and nitrogen. Relative to nitrogen the proportion of the very soluble argon was increased and the pro...

Journal: :gas processing 0
ali mohebbi department of chemical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran mahboobeh taheri department of chemical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran hassan hashemipour department of chemical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran ali morad rashidi research institute of petroleum industry (ripi), tehran, iran

in this study, it was shown that how co2 and h2s were removed from a natural gas stream, using a nanofluid containing nanoporous graphene in diehanolamine (dea). before running the experiments, the appropriate values were chosen for the nanosheet dosage and the liquid and gas flow rates in the absorption experiments, which were performed in a laboratory scale wetted wall column. in the experime...

2010
Wolfram Schenck Ralph Welsch Alexander Kaiser Ralf Möller

We propose a novel algorithm for adaptive learning rate control for Gaussian mixture models of the NGPCA type. The core idea is to introduce a unit–specific learning rate which is adjusted automatically depending on the match between the local principal component analysis of each unit (interpreted as Gaussian distribution) and the empirical distribution within the unit’s data partition. In cont...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

Journal: :international journal of energy and environmental engineering 2011
o jahanian s.a jazayeri

in this paper, the performance of a natural gas hcci engine is studied through a thermodynamic model including detailed chemical kinetics. it is shown that as hydroxyl radical has important effects on natural gas combustion, it is possible to quantify soc with hydroxyl concentration variations. meanwhile the influence of using formaldehyde as an additive on the engine characteristics has been i...

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