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BOC GROUP INVENTS A TECHNIQUE FOR PRODUCING PRODUCTS FROM COMBUSTION EXHAUST GASES

 BOC GROUP INVENTS A TECHNIQUE FOR PRODUCING PRODUCTS
 FROM COMBUSTION EXHAUST GASES
 MURRAY HILL, N.J., June 19 /PRNewswire/ -- The BOC Group has invented a technique for producing useful products from combustion exhaust gases. Patented by BOC's Ramanchandran "Krish" Krishnamurthy and Mark J. Andrecovich, the technology enables carbon dioxide, nitrogen and argon to be captured efficiently and economically from exhaust gas.
 This advance benefits the environment in two ways:
 -- The extraction of commercially-viable gases from exhaust flows, otherwise vented to the atmosphere, will make better use of natural resources. In some cases, purified carbon dioxide can be used in chemicals synthesis, thereby reducing the adverse effect on the atmosphere of "greenhouse" gases.
 -- Exhaust gas constituents such as nitrogen oxides and sulfur dioxide which contribute to acid rain are rendered harmless, thus facilitating disposal.
 This energy-efficient technology will be of wide value in the production of industrial gases and has application in the chemical industry. For example, it can be used in conjunction with a hydrogen plant to extract nitrogen from exhaust gases for use in an on-site ammonia plant, making low-capacity ammonia production a viable option.
 Another possibility is to use the technique to recover nitrogen from the exhaust gases produced by an ammonia plant reformer furnace. This nitrogen can be used with the hydrogen produced by reforming as a synthesis gas in the ammonia reactor. The carbon dioxide recovered from the exhaust gases can be used to produce urea by reaction with ammonia.
 Invention in Detail
 Exhaust gas is treated to remove particulate matter and then compressed to a pressure of between 2 and 15 psig. It is purified to remove trace contaminants and separated to produce fractions which are rich in carbon dioxide and nitrogen.
 The fraction rich in carbon dioxide is then liquefied and distilled to remove volatile contaminants, thus producing pure carbon dioxide. The nitrogen-rich fraction is purified and cryogenically distilled to produce pure nitrogen, and argon if required.
 The BOC Group
 This technique is one of the latest developments by the BOC Group, which applied to patent over 125 advances last year. The BOC Group is the worldwide industrial gases, distribution services, healthcare and vacuum technology company which operates in more than 60 countries and with sales last year of $5.2 billion. Airco is BOC's U.S. gases business (Murray Hill).
 -0- 6/19/92
 /CONTACT: Martha L. Eckert of Airco Gases, 908-771-1491/ CO: BOC Group ST: New Jersey IN: SU:


AH-OS -- NY067 -- 2070 06/19/92 16:40 EDT
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Publication:PR Newswire
Date:Jun 19, 1992
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