hydrogen: Sources and Commercial Preparation

	Site Map \| FAQ in Daily Almanac for Nov 12, 2009 Search White Pages
Skip Navigation Home American Indian Heritage Month Atlas Encyclopedia Dictionary Thesaurus Features Quizzes Timelines Countries Slideshows

Fact Monster Kid's reference,
games, quizzes

Editor's Favorites

Encyclopedia—hydrogen

Sources and Commercial Preparation

While hydrogen is only about one part per million in the atmosphere, it is the most abundant element in the universe. It is believed that hydrogen makes up about three quarters of the mass of the universe, or over 90% of the molecules. It is found in the sun and in other stars, where it is the major fuel in the fusion reactions (see nucleosynthesis) from which stars derive their energy.

Hydrogen is prepared commercially by catalytic reaction of steam with hydrocarbons, by the reaction of steam with hot coke (carbon), by the electrolysis of water, and by the reaction of mineral acids on metals. Millions of cubic feet of hydrogen gas are produced daily in the United States alone.

Sections in this article:

Premium Partner Content

Related content from HighBeam Research on: hydrogen: Sources and Commercial Preparation

Epoxidation of Canola Oil with Hydrogen Peroxide Catalyzed by Acidic Ion Exchange Resin (JAOCS, Journal of the American Oil Chemists' Society)

Spectrofluorometric determination of olanzapine and fluphenazine hydrochloride in pharmaceutical preparations and human plasma using eosin: application to stability studies.(DRUG FORMULATIONS AND CLINICAL METHODS)(Report) (Journal of AOAC International)

Spectrofluorometric determination of verapamil hydrochloride in pharmaceutical preparations and human plasma using organized media: application to stability studies.(DRUG FORMULATIONS AND CLINICAL METHODS)(Report) (Journal of AOAC International)

RUSSIA: Technical consultancy contract award for planned hydroprocessing upgrade project also includes the preparation of engineering, procurement and construction (EPC) bid package and assistance in contractor selection, FOSTER WHEELER ENERGY LTD. (FWEL) [UK]. (WWP- Report on Oil Gas & Petrochemicals in the Developing World)

Commercial catalysts: over the past decade CACHy catalysts have developed from an academic curiosity to commercial catalysts. John Blacker and Michael North discuss their development and potential.(Catalytic Asymmetric CyanoHydrin) (Chemistry and Industry)

Proposed lead molecules against Hemagglutinin of avian influenza virus ([H.sub.5][N.sub.1]).(Hypothesis) (Bioinformation)

Part 2. Mechanistic aspects of the reduction of S -alkyl-thionocarbonates in the presence of triethylborane and air.(Full Research Paper) (Beilstein Journal of Organic Chemistry)

Fuel cell promises clean energy. (Natural Life)

"I've got a Lovely Bunch of Coconuts" Coconut holds promise for Immune-Suppressed People. (Letters to the Editor). (Townsend Letter for Doctors and Patients)

Bulk displacement chlorination. (National Driller)

Infoplease Tools