Conversion of light hydrocarbon gases to metal carbides for production of liquid fuels and chemicals. Quarterly technical progress report, January 1--March 31, 1995

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The methane plasma stabilization problem was resolved with the reconfiguration of the DC power supply to give a higher open circuit voltage to enable operation of the arc at higher voltage levels and with the installation of a solenoid around the plasma reactor to magnetically rotate the are. Cathode tip erosion problems were encountered with the 1/4-inch graphite and tungsten tips which necessitated a redesign of the plasma reactor. The new plasma reactor consists of an enlarged 3/4-inch O.D. graphite tip to reduce current density and a 1-inch I.D. graphite anode. Products from MgO/CH{sub 4} scoping runs in the redesigned ... continued below

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15 p.

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Diaz, A.F.; Modestino, A.J.; Pride, J.D.; Howard, J.B.; Tester, J.W. & Peters, W.A. May 1, 1995.

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Description

The methane plasma stabilization problem was resolved with the reconfiguration of the DC power supply to give a higher open circuit voltage to enable operation of the arc at higher voltage levels and with the installation of a solenoid around the plasma reactor to magnetically rotate the are. Cathode tip erosion problems were encountered with the 1/4-inch graphite and tungsten tips which necessitated a redesign of the plasma reactor. The new plasma reactor consists of an enlarged 3/4-inch O.D. graphite tip to reduce current density and a 1-inch I.D. graphite anode. Products from MgO/CH{sub 4} scoping runs in the redesigned reactor under conditions of excess MgO gave strong indications that a breakthrough has finally been achieved i.e. that synthesis of magnesium carbides from MgO and methane in the arc discharge reactor has been demonstrated. Significant quantities of hydrocarbons, primarily C{sub 3}H{sub 4} and C{sub 2}H{sub 2}, were detected in the headspace above hydrolyzed solid samples by GC analysis. In one run, solids glowed upon exposure to the atmosphere, strongly suggesting carbide reaction with moisture in the air, exothermically forming acetylenes which ignited instantaneously in the presence of oxygen and elevated temperatures arising from localized heat-up of the specimens.

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15 p.

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OSTI as DE95016666

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  • Other Information: PBD: May 1995

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  • Other: DE95016666
  • Report No.: DOE/PC/92111--T9
  • Grant Number: AC22-92PC92111
  • DOI: 10.2172/95345 | External Link
  • Office of Scientific & Technical Information Report Number: 95345
  • Archival Resource Key: ark:/67531/metadc794869

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  • May 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 20, 2017, 1:48 p.m.

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Diaz, A.F.; Modestino, A.J.; Pride, J.D.; Howard, J.B.; Tester, J.W. & Peters, W.A. Conversion of light hydrocarbon gases to metal carbides for production of liquid fuels and chemicals. Quarterly technical progress report, January 1--March 31, 1995, report, May 1, 1995; Cambridge, Massachusetts. (digital.library.unt.edu/ark:/67531/metadc794869/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.