"Dimethyl Ether as a Transportation Fuel," for the National Renewable Energy Laboratory, 1997.

"Comparison of Alternative Transportation Fuel Performance Properties" for the National Renewable Energy Laboratory, 1997.

"Marketing the Environmental Message," World LPG Forum, Vancouver, British Columbia, Canada, October 1994.

"Alternative Fuels Comparisons," Denver Clean Cities Workshop, Denver, Colorado, August 1994.

"What Are the Alternative Fuels?" The International Alternative Fuels and Clean Cities Conference, Milwaukee, Wisconsin, June 1994.

"Clean Fuels Overview," American Gas Association Operations Conference, San Francisco, California, May 1994.

"Alternate Fuels, The Future is Now," Annual Meeting of the Rocky Mountain Interagency Motor Equipment Advisory Committee, Park City, Utah, November 1993.

"Oxygenated Fuels and Alternative Fuels: Are They Worth It?" Ninth Annual Mobile Sources/Clean Air Conference, Vail, Colorado, September 1993.

"Alternative Fuels Overview," National Alternative Fuels Conference, Milwaukee, Wisconsin, June 1993.

"The Environmental Benefits of Alternative Transportation Fuels," Clean Fuels Forum '93, Toronto, Ontario, Canada, April 1993.

"Current and Potential Future Performance of Ethanol Fuels," Society of Automotive Engineers International Congress and Exposition, with B. Bailey, Detroit, Michigan, March 1993.

"Utilization of Lignite Char for Controlling Air Toxics Emissions," Symposium on Opportunities in the Synfuels Industry, with E. Sondreal, M. Jones, C. Knudson and R. Timpe, Bismarck, North Dakota, September 1992.

"Market Opportunities for North Dakota Lignite," Symposium on Opportunities in the Synfuels Industry, Bismarck, North Dakota, September 1992.

"Determining the Best Alternative Fuel Option," National Alternative Fuels Conference, Milwaukee, Wisconsin, June 1992.

"The Rationale for LNG," Society of Automotive Engineers TOPTEC on Liquefied Natural Gas Vehicles, Orlando, Florida, March 1992.

"Comparison of CNG and LNG Technologies for Transportation Applications," Automotive Technology Development Contractors' Coordination Meeting, Dearborn, Michigan, October 1991.

"Pros and Cons of Alternative Fuels," Seventh Annual Mobile Sources/Clean Air Conference, Durango, Colorado, September 1991.

"Niche Market Assessment for Eastern Oil Shale," 1989 Eastern Oil Shale Symposium, Lexington, Kentucky, November 1989.

"Mild Gasification for Production of Metallurgical Carbon, Diesel Fuel and Chemicals," Sixth Korea/USA Joint Workshop on Coal Utilization Technology, with E. Sondreal, R. Ness, R. Timpe, C. Knudsen, M.Jha, M. Berggren, Seoul, South Korea, October 1989.

"Mild Gasification Products from Midwestern Bituminous and Western Low-Rank Coals," with E. Sondreal, R. Ness, R. Timpe, M. Jha and M. Berggren, Sixth Annual International Coal Conference, Pittsburgh, Pennsylvania, September 1989.

"The Market Potential for Hydrogen from the Catalyzed Gasification of Low-Rank Coals," with R. Sears, Fifteenth Biennial Low-Rank Fuels Symposium, St. Paul, Minnesota, May 1989.

"Niche Market Assessment for a Small-Scale Western Oil Shale Project," 22nd Oil Shale Symposium, Colorado School of Mines, Golden, Colorado, April 1989.

"Market Assessment for Hydrogen from the Catalyzed Gasification of Low-Rank Coals," Twelfth Annual Energy-Sources Technology Conference, Houston, Texas, January 1989.

"Development of an Advanced Continuous Mild Gasification Process for the Production of Co-Products," with R. Ness, W. Willson, J. Hendrikson, J. Entzminger, M. Jha, American Institute of Chemical Engineers Summer  National Meeting, Denver, Colorado, August 1988.

"Potential Production of Specialty Chemicals from Oil Shale in The United States," International Conference on Oil Shale and Shale Oil, Beijing, China, May 1988.

"Marketing considerations for an Indiana Oil Shale Project", 20th Oil Shale Symposium, Colorado School of Mines, Golden, Colorado, April 1987.

"Advances in Mining Assisted Methods for Petroleum Recovery," Heavy Oil and Tar Sands Conference, Los Angeles, California, December 1985.

"The Coming Decade of Heavy Oil and Tar Sands," Fifth Worldwide Symposium on Synfuels, Washington, D.C., November 1985.

"Long-Term Cycles and the Prediction of Petroleum Demand," Society of Petroleum Engineers, Hydrocarbon Economics and Evaluation Symposium, Dallas, Texas, March 1985.

"Mining Assisted Methods of Recovering Petroleum, Heavy Oil, and Oil Sands," Symposium on Heavy Oil and Tar Sands, EOR Week, Los Angeles, California, November 1983.

"Projection of Lignite Utilization in the Gulf Coast Region," with R. Gist and L. Posey, Coal Technology '83, Houston, Texas, November 1983.

"Overview of Global Synthetic Fuels Activities," with R. Gist, Third Worldwide Symposium, Synfuels, Washington, D.C., November 1983.

"Enhanced Oil Recovery Versus Synthetic Fuels," Energy Bureau Symposium on EOR, Houston, Texas, June 1982.

"Technologies of Shale Oil Recovery," Energy Bureau Symposium on Oil Shale, Denver, Colorado, May 1982.

"Oil Shale Retorting Technology," Energy Bureau Symposium on Oil Shale, Denver, Colorado, August 1981.

"Process Heat Potential for the High Temperature Gas Cooled Reactor," Proceedings of the 1980 Utility/User Conference on the HTGR, San Diego, California, October 1980.

"Oil Shale Overview and Outlook," Colorado Miner, Vol. 2, No. 4, September 1980.

"Siting Considerations for Commercial Coal Conversion Facilities," with T. C. Borer, G. M. O'Hara and D. Crane, Coal Technology '80, Houston, Texas, November 1980.

"Shale Oil in the U. S. Energy Market," United States - Morocco Oil Shale Colloquium, Rabat, Morocco, October 1980.

"Resource Requirements for a Synthetic Fuels Industry," Association of Energy Engineers, Synthetic Fuels Symposium, Chicago, Illinois, May 1980.

"Applications of a High Temperature Gas Cooled Reactor in Oil Shale Processing," with D. E. Roe, 13th Oil Shale Symposium, Colorado School of Mines, Golden, Colorado, April 1980.

"Economic Implications for Industry of the Powerplant and Industrial Fuel Use Act," with D. E. Roe and T.C. Borer, Coal Technology '79, Houston, Texas, November 1979.

"Overview of Synthetic Fuels Potential to 1990," for the U. S. Senate Committee on the Budget, September 1979.

"Reconsider Coal Conversion Processing," Hydrocarbon Processing, July 1979.

"Coal Hydrogenation: A New Approach Needed?", American Institute of Chemical Engineers 86th National Meeting, Houston, Texas, April 1979.

"Mixed Fuel Gas," Proceedings of Second Meeting on Environmental Aspects of Non-Conventional Energy Resources, American Nuclear Society, September 1978.

"Identification of Probable Automotive Fuels Composition: 1985-2000," with J. A. Russell, et al, U.S. Department of Energy, EY-76-C-04-3684, February 1978.

"Evaluation of Background Data Relating to New Source Performance Standards for Lurgi Gasification," U.S. Environmental Protection Agency, EPA-600/7-77-057, June 1977.

"Disposal of Mine Water from a Deep Oil Shale Mine," Proceedings of the Second Pacific Chemical Engineering Congress, American Institute of Chemical Engineers, August 1977, p. 437.

"Methods for Plugging Leaking Chemical Containers," with R. C. Mitchell, et al, Proceedings of the 1972 National Conference on Control of Hazardous Material Spills, U. S. Environmental Protection Agency, p. 103.

"The Deposition of Iron Corrosion Products from Flowing Nitrogen Tetroxide," with F.C. Gunderloy, et al., 11th Liquid Propulsion Symposium, September 1969.

"Sensitivity Measurements on Compounds R and T," with C. A. Younts, Seminar on Sensitivity of N-F Compounds, Chemical Propulsion Information Agency, June 1966.

"Solubility of Helium in Liquid Argon, Oxygen, and Carbon Monoxide," with F. Kurata, Journal of Chemical and Engineering Data, Vol. 11, No. 4, October 1966, p. 537.

"Vapor-Liquid Phase Behavior of the Helium- Methane System," with F. Kurata and D. L. Schindler, AIChE Journal, Vol. 12, No. 2, March 1966, p. 353.

"The Liquid Phase Volumetric Behavior of the Helium-Methane System," with F. Kurata, Journal of Chemical and Engineering Data, Vol. 11, No. 1, January 1966, p. 1.

"The Solubility, Partial Molal Volume and Diffusivity of Helium in Liquid Methane," Ph.D. Thesis, Department of Chemical Engineering, University of Kansas, 1965.

"Vapor-Liquid Equilibria at Atmospheric Pressure," with J. H. Weber, Journal of Chemical and Engineering Data, Vol. 5, No. 3, July 1960.

4,323,538 (1982) Coal Hydrogenation Apparatus

4,243,509 (1981) Coal Hydrogenation

4,169,128 (1979) Process for Coal Liquefaction and Gasification

4,180,452 (1978) Microwave Process for Coal Liquefaction

3,941,124 (1976) Cryogenic Recovery