نتایج جستجو برای: hydrogen purification

تعداد نتایج: 200981  

Journal: :Journal of colloid and interface science 2007
G Q Lu J C Diniz da Costa M Duke S Giessler R Socolow R H Williams T Kreutz

Hydrogen as a high-quality and clean energy carrier has attracted renewed and ever-increasing attention around the world in recent years, mainly due to developments in fuel cells and environmental pressures including climate change issues. In thermochemical processes for hydrogen production from fossil fuels, separation and purification is a critical technology. Where water-gas shift reaction i...

2018
David Alique David Martinez-Diaz Raul Sanz Jose A Calles

In the last years, hydrogen has been considered as a promising energy vector for the oncoming modification of the current energy sector, mainly based on fossil fuels. Hydrogen can be produced from water with no significant pollutant emissions but in the nearest future its production from different hydrocarbon raw materials by thermochemical processes seems to be more feasible. In any case, a mi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - دانشکده علوم پایه 1385

در این پایان نامه شناسایی نانولوله کربنی به وسیله طیف های xrd و raman و همچنین ذخیره سازی الکتروشیمیایی هیدروژن در نانولوله کربنی بررسی شدهاست. خالص سازی نانولوله ها به دو روش حرارتی انجام شده است. در طیف xrd نانولوله پیک (002) در حوالی 26 است که نسبت به گرافیت این پیک ضعیف تر و پهن تر شده است در طیف رامان نمونه تک دیواره پیک rbm در نقطه 238cm-1 است که مطابق با آن شعاع نانولوله 02/1 نانومتر ...

Journal: :Crystals 2022

Aiming for hydrogen and oxidation easily produced in the melting process of Al-Mg alloys, three processes, including non-vacuum static melt treatment, rotary-injection purification vacuum-stirring purification, were used to purify Al-6Mg alloy melt. The content inclusion studied by means solid-state measurement method, reduced pressure test FESEM EDS. results show that effect is better than tre...

2010

Palladium has long been recognised for its hydrogen sorption and separation capabilities. Alloying with different metals to produce binary alloys has been shown to further improve many of its essential properties significantly. Currently palladium-silver alloys are used commercially for the hydrogen purification process, however, other binary alloys have also been shown to significantly improve...

Journal: :Membrane Technology 2021

This article provides details of a study that investigates hydrogen (H2) separation, purification and transport behaviour ceramic ?-alumina membrane compares it with ?-alumina modified Boehmite sol.

2013
Neslihan Yuca Nilgün Karatepe

The aim of this study was to synthesize the single walled carbon nanotubes (SWCNTs) and determine their hydrogen storage capacities. SWCNTs were firstly synthesized by chemical vapor deposition (CVD) of acetylene (C2H2) on a magnesium oxide (MgO) powder impregnated with an iron nitrate (Fe(NO3)3·9H2O) solution. The synthesis parameters were selected as: the synthesis temperature of 800°C, the i...

Journal: :Chemical communications 2011
Yan Jiao Aijun Du Marlies Hankel Zhonghua Zhu Victor Rudolph Sean C Smith

We theoretically extend the applications of graphdiyne, an experimentally available one-atom-thin carbon allotrope, to nanoelectronics and superior separation membrane for hydrogen purification on a precise level.

2004
Raj Chakraborty

A Pall Maxi-Gaskleen purifier of the Pall AresKleen family of gas purification products was evaluated for its efficacy in reducing oxygen impurities in a silicon germanium (SiGe) deposition process for a strained silicon application at a major IDM in the US. Impact on process parameters such as hydrogen pre-bake temperature and interfacial/within-film oxygen concentration were studied as a func...

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