University of California

United States of America As Represented by the Secretary of the Air Force

Douglas P Harrison

Kalliat T Valsaraj

Klaus S Lackner

Hans J Ziock

Louis J Thibodeaux

Hydrogen is produced from solid or liquid carbon-containing fuels in a two-step process. The fuel is gasified with hydrogen in a hydrogenation reaction to produce a methane-rich gaseous reaction product, which is then reacted with water and calcium oxide in a hydrogen production and carbonation reaction to produce hydrogen and calcium carbonate. The calcium carbonate may be continuously removed from the hydrogen production and carbonation reaction zone and calcined to regenerate calcium oxide, which may be reintroduced into the hydrogen production and carbonation reaction zone. Hydrogen produced in the hydrogen production and carbonation reaction is more than sufficient both to provide the energy necessary for the calcination reaction and also to sustain the hydrogenation of the coal in the gasification reaction. The excess hydrogen is available for energy production or other purposes. Substantially all of the carbon introduced as fuel ultimately emerges from the invention process in a stream of substantially pure carbon dioxide. The water necessary for the hydrogen production and carbonation reaction may be introduced into both the gasification and hydrogen production and carbonation reactions, and allocated so as transfer the exothermic heat of reaction of the gasification reaction to the endothermic hydrogen production and carbonation reaction.

Hydrogen production from carbonaceous material

System and method for removing volatile organic compounds from water are described which comprise a substantially closed housing, a column of fluid permeable extended surface packing disposed between a pair of screens within said housing and extending substantially from the top to the bottom thereof, the packing and housing defining therebetween first and second diametrically oppositely disposed chambers (air plenums) extending generally from top to bottom of the housing, a liquid inlet and air outlet at the top of the housing and a liquid outlet and air inlet at the bottom of the housing for flowing water generally downwardly through the packing and for passing air generally upwardly through the first and second chambers within the housing, and a plurality of baffles with the housing dividing the first and second chambers into a plurality of stages for directing the generally upward flow of air in a crisscross fashion through the packing and generally perpendicularly to the generally downwardly flow of water.

Growing community of inventors

Baton Rouge, LA, United States of America

Douglas P Harrison