Patents:

• Siriwardane, R.V., “Regenerable Sorbents for Carbon Dioxide Capture from Moderate/High Temperature Gas Streams”, application under review by U.S. Patent Office.
• Siriwardane, R.V., “Solid Sorbents for Removal of Carbon Dioxide from Low Temperature Gas Streams”, U.S. Patent No. 6,908,497 B1, June 21, 2005.
• Siriwardane, R.V., “Low Temperature Sorbents for Removal of Sulfur from Fluid Gas Streams”, U.S. Patent No. 2002/0052291, May 2, 2002.
• Siriwardane, R.V., "Durable Redeemable Sorbent Pellets for Removal of Hydrogen Sulfide from Coal Gas", U.S. Patent No. 5,703,003, Dec. 30 1997.
• Poston, J.A., "Reduction of Spalling in Mixed Metal Oxide Desulfurization Sorbents by the Addition of a Large Promoter Metal Oxide", U.S. Patent, Dec.1997.
• Siriwardane, R.V., "Durable Zinc Oxide Containing Sorbents for Coal Gas Desulfurization", U.S. Patent No. 5,494,880, Feb. 27, 1996.
• Siriwardane, R.V., "Catalytic Conversion of Methane to Higher Hydrocarbons”, U.S. Patent No. 5177294, Jan. 1993.

Licenses:

• Sud Chemie, Inc. (formerly United Catalysts, Inc. – UCI) - A license was signed with UCI to produce desulfurization sorbents based on the patents (Nov.1998).

Publications:

• Siriwardane, R.V, Poston, J.A., and Fisher, E., “Interaction of Hydrogen Sulfide with Zr 0.92 Y 0.08 O₂- /40%Ni Cermet,” Applied Surface Science, Vol. 243, p. 40, 2005.
• Siriwardane, R.V., Shen, M., and Fisher, E., “Adsorption of CO₂ on Zeolites at Moderate Temperatures,” Energy and Fuels , Vol. 19 No. 3, p. 1153, 2005.
• Daeho, K., Siriwardane, R.V., and Biegler, L.T., “Optimization of Pressure Swing Adsorption and Fractionated Vacuum Swing Adsorption Processes for CO₂ Sequestration,” accepted for publication by Industrial & Engineering Chemistry Research, 2005.
• Siriwardane, R.V., Shen, M., and Fisher, E. “Adsorption of CO₂ on Natural Zeolites,” Energy and Fuels , Vol. 17, No. 3, p. 571, 2003.
• Daeho, K., Siriwardane, R.V., and Biegler, L.T., “Optimization of Pressure Swing Adsorption Process Using Zeolite 13X for CO₂ Sequestration,” Industrial & Engineering Chemistry Research, Vol. 42, No. 2, p. 339, 2003.
• Akten, E.D.; Siriwardane, R.V., and Sholl, D.S., “ Monte Carlo Simulation of Single and Binary Component Adsorption of CO₂ and N₂ on Zeolite 4A,” Energy and Fuels, Vol. 17, No. 4, p. 977, 2003.
• Poston J.A., Siriwardane, R.V., and Fisher, E., “Thermal Decomposition of Rare Earth Sulfates of Cerium (III), Cerium (IV), Lanthanum (III), and Samarium (III),” Applied Surface Science, Vol. 214, p. 83, 2003.
• Siriwardane, R.V, Poston, J.A., and Fisher, E., “Characterization of Ceramic-Metal Composite Hydrogen Separation Membranes Consisting of Barium Oxide, Cerium Oxide, Yttrium Oxide, and Palladium,” Applied Surface Science, Vol. 217, p. 43, 2003.
• Siriwardane, R.V., Shen, M., Fisher, E., and Poston, J.A., “Adsorption of CO₂ on Molecular Sieves and Activated Carbon,” Energy and Fuels, Vol. 15, pp. 279-284, 2001.
• Siriwardane, R.V, Poston, J.A., Gardner , T., and Fisher, E., “Spectroscopic Characterization of Nickel Containing Desulfurization Sorbents,” Industrial & Engineering Chemistry Research, Vol. 39, No. 4, pp. 1106-1110, 2000.
• Siriwardane, R.V., Poston, J.A., Fisher, E., Balachandran, U., Lee, T., and Dorris, S., “Characterization of Ceramic Hydrogen Separation Membranes with Varying Nickel Concentrations,” Applied Surface Science, Vol. 167, pp. 34 -50, 2000.
• Siriwardane, R.V, Poston, J.A., Fisher, E., and Shen, M., “Decomposition of Sulfates of Copper, Iron (II), Iron (III), Nickel, and Zinc: XPS, SEM, DRIFTS, XRD, and TGA Study,” Applied Surface Science , Vol. 152, pp. 219 -236, 1999.
• Siriwardane, R.V. and Woodruff, S., "In-Situ Fourier Transform Infrared Characterization of Sulfur Species Resulting from the Reaction of Water Vapor and Oxygen with Zinc Sulfide ,” Industrial & Engineering Chemistry Research , Vol. 36, No.12, pp. 5277-5281, 1997.
• Poston, J.A. "A Reduction in the Spalling of Zinc Titanate Desulfurization Sorbents Through the Addition of Lanthanum Oxide ,” Industrial & Engineering Chemistry Research, Vol. 35, No. 3, pp. 875-882, 1996.
• Poston, J.A. "Simple Modifications for Accurate High Temperature Gas Exposures Using Scanning Electron Microscopy,” Scanning, Vol. 17, pp. 316-321, 1995.
• Siriwardane, R.V. and Woodruff, S., "FTIR Characterization of the Interaction of Oxygen with Zinc Sulfide ,” Industrial & Engineering Chemistry Research, Vol. 34, No.2, pp. 699-702, 1994.
• Siriwardane, R.V., Poston, J.A. and Evans Jr., G., "Spectroscopic Characterization of Molybdenum-Containing Zinctitanate Desulfurization Sorbents,” Industrial & Engineering Chemistry Research , Vol. 33, No.11, pp. 2810-2818, 1994.
• Siriwardane, R.V., "Characterization of Copper Oxides, Iron Oxides, and Zinc Copper Ferrite Desulfurization Sorbents by X-Ray Photoelectron Spectroscopy and Scanning Electron Microscopy ,” Applied Surface Science , Vol. 68, pp. 65-80, 1993.
• Siriwardane, R.V., "X-Ray Photoelectron Spectroscopic Investigation of Oxidative Coupling of Methane over Samarium Oxide Promoted with Sodium Pyrophosphate,” Langmuir , Vol. 7, pp. 497-502, 1991.
• Siriwardane, R.V., and Poston, J.A., "Interaction of H₂S with Zinctitanate in the Presence of H 2 and CO," Applied Surface Science, Vol. 45, pp.131-139, 1990.
• Siriwardane, R.V., "Oxidative Coupling of Methane Over CaO and Gd 2 O₃ Promoted with Sodium Pyrophosphate," Journal of Catalysis, Vol. 123, pp. 496-512, 1990.
• Siriwardane, R.V., and Shamsi, A., "Oxidative Coupling of Methane over GdMnO₃ Perovskites Promoted with Sodium Pyrophosphate," Applied Catalysis, Vol. 60, pp.119-136, 1990.
• Siriwardane, R.V., "Interaction of SO₂ and O₂ Mixtures with CaO and Sodium Deposited on CaO," Journal of Colloid and Interface Science, Vol. 132, pp. 200-209, 1989.
• Siriwardane, R.V., "Effect of Alkali Metals and Alkali Halides on the Interaction of SO₂ with CaO," Journal of Colloid and Interface Science, Vol. 121, pp. 590-598, 1988.
• Siriwardane, R.V., "Effect of Oxygen on the Adsorption of SO₂ on CaO, Iron, and Sodium Deposited on CaO," Journal of Colloid and Interface Science, Vol. 116, pp. 463-472, 1987.
• Siriwardane, R.V., and Cook, J.M., "Interaction of SO₂ with Iron Deposited on Calcium Oxide," Journal of Colloid and Interface Science, Vol. 116, pp. 70-80, 1987.
• Siriwardane, R.V., and Cook, J.M., "Interaction of SO₂ with Sodium Deposited on Calcium Oxide," Journal of Colloid and Interface Science, Vol. 114, pp. 525-535, 1986.
• Siriwardane, R.V., and Cook, J.M., "Interaction of NO with Iron Deposited on Alumina,” Journal of Colloid and Interface Science, Vol. 110, pp. 504-513, 1986.
• Siriwardane, R.V., and Cook, J.M., "Interaction of SO₂ with Sodium Deposited on Silica," Journal of Colloid and Interface Science, Vol. 108, pp. 414-422, 1985.
• Siriwardane, R.V., and Cook, J.M., "Interaction of NO and SO₂ with Iron Deposited on Silica," Journal of Colloid and Interface Science, Vol. 104, pp. 250-257, 1985.

For more information contact: Ranjani Siriwardane