نتایج جستجو برای: clean hydrogen

تعداد نتایج: 176961  

2004
Rakesh Agrawal

The promise of hydrogen resides in its being a clean and efficient energy source. This paper examines this promise in the context of hydrogen production, transportation, delivery and end use. Several fossil fuel feedstocks as well as renewable sources are examined. The cost and efficiency analysis as well as a potential market scenario for the development of light duty vehicles using hydrogen f...

2009
Leslie J. Murray Mircea Dincă Jeffrey R. Long

New materials capable of storing hydrogen at high gravimetric and volumetric densities are required if hydrogen is to be widely employed as a clean alternative to hydrocarbon fuels in cars and other mobile applications. With exceptionally high surface areas and chemically-tunable structures, microporous metal–organic frameworks have recently emerged as some of the most promising candidate mater...

2005
Keiichi Taniguchi

Recently, the introduction of advanced “Hydrogen Gas Cutting” was investigated but finally abandoned due to the problems of several accidents occurred, cost merit and safety. The facility is called “Hydrogen-Oxygen Mixture Gas Generation System” and stores the hydrogen detonating gas (when hydrogen and oxygen are mixed to 2:1 in volume ratio, the mixture gas violently explodes if ignited), so t...

Journal: :Microbial Cell Factories 2005
Debajyoti Dutta Debojyoti De Surabhi Chaudhuri Sanjoy K Bhattacharya

The limited fossil fuel prompts the prospecting of various unconventional energy sources to take over the traditional fossil fuel energy source. In this respect the use of hydrogen gas is an attractive alternate source. Attributed by its numerous advantages including those of environmentally clean, efficiency and renew ability, hydrogen gas is considered to be one of the most desired alternate....

2015
Peng Hu Eran Fogler Yael Diskin-Posner Mark A. Iron David Milstein

Hydrogen is an efficient green fuel, but its low energy density when stored under high pressure or cryogenically, and safety issues, presents significant disadvantages; hence finding efficient and safe hydrogen carriers is a major challenge. Of special interest are liquid organic hydrogen carriers (LOHCs), which can be readily loaded and unloaded with considerable amounts of hydrogen. However, ...

Journal: :Science 2017
Zhi Wei Seh Jakob Kibsgaard Colin F Dickens Ib Chorkendorff Jens K Nørskov Thomas F Jaramillo

Electrocatalysis plays a central role in clean energy conversion, enabling a number of sustainable processes for future technologies. This review discusses design strategies for state-of-the-art heterogeneous electrocatalysts and associated materials for several different electrochemical transformations involving water, hydrogen, and oxygen, using theory as a means to rationalize catalyst perfo...

Journal: :Physical review letters 2005
Yu Jia Wenguang Zhu E G Wang Yuping Huo Zhenyu Zhang

Using first-principles total energy calculations within density functional theory, we investigate the energetics, kinetics, and transport properties of Ti on clean and hydrogen-terminated diamond (100)-2x1 surfaces at increasing Ti coverages. On a clean surface, an isolated Ti adatom prefers to adsorb on top of a C-C dimer row, and also diffuses faster along the dimer row direction. As the Ti c...

Journal: :Physical chemistry chemical physics : PCCP 2013
J G Howalt T Vegge

Theoretical investigations of electrochemical production of ammonia at ambient temperature and pressure on nitrogen covered molybdenum nanoparticles are presented. Density functional theory calculations are used in combination with the computational hydrogen electrode approach to calculate the free energy profile for electrochemical protonation of N2 and N adatoms on cuboctahedral Mo13 nanopart...

2015
He Ning

THE FEASIBILITY OF TRANSFERRING CLEAN TECHNOLOGY FROM THE UNITED STATES TO CHINA: A CASE STUDY FROM THE PAPER INDUSTRY

2016
Rosaria Ciriminna Valerica Pandarus Riccardo Delisi Antonino Scurria Maria Pia Casaletto Francesco Giordano François Béland Mario Pagliaro

BACKGROUND The introduction of an heterogeneously catalyzed gold-based alcohol oxidation process of broad applicability using a clean primary oxidant would be highly desirable. Gold is non toxic and carbonyl and carboxyl compounds are widely used to produce medicines, plastics, colorants, paints, detergents, fragrances, flavors, and other valued functional products. RESULTS The sol-gel entrap...

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