Energy from fossil carbon sources are briefly reviewed and the possibilities are detailed of utilizing limestone to produce a synthetic liquid hydrocarbon. The Bergins and Fischer-Tropsch processes of coal liquefication are outlined. An effort is now underway towards initiating the large scale production of synthetic benzene and other aromatics that can be made from it. The methods utilized in this method may be summarized: the limestone or other carbonate or carbonized material (such as charcoal, agricultural wastes, forestry materials etc.) is converted to lime and the carbon dioxide collected. The gas is then purified and reacted with molten lithium metal at approximately 1300 deg. F. An alternative is outlined whereby the limestone is reacted under vacuum and at 1300 deg. F, directly with molten lithium. In this case, the lime is removed from the solution resulting from the carbide hydrolysis and the lithium recovered for recycling. The chemical yields in the acetylene-producing steps are better than 90 percent. The lithium carbide hydrolysis generates acetylene that is purified in various ways before being submitted to a catalyst (vanadium or chromium activated beads) for cyclization to benzene. Catalyst activity is discussed. The use of synthetic benzene and derivatives as extenders for petroleum fuels is reviewed. The advantages are described of a synthetic benzene content of 10 to 20 percent of regular gasoline. Environmental considerations in the production of synthetic benzene are outlined: the recycling of intermediates in the process of benezene production; reactivation of the catalyst; and the use of a waste product as the raw material in the production (of benzene) itself. Some advantages in the synthesized benezene internal conbustion fuel constituent are listed. The most important among these are the reduction of U.S. dependence on imported oil.

  • Corporate Authors:

    National Limestone Institute, Incorporated

    1315 Sixteenth Street, NW
    Washington, DC  United States  20036
  • Authors:
    • Tamers, M A
  • Publication Date: 1975-6

Media Info

  • Features: Photos;
  • Pagination: 6 p.
  • Serial:
    • Limestone
    • Volume: 12
    • Issue Number: 44
    • Publisher: National Limestone Institute, Incorporated

Subject/Index Terms

Filing Info

  • Accession Number: 00098667
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM