1
Zoe D Ziaka, Savvas Vasileiadis: Reactor-membrane permeator process for hydrocarbon reforming and water gas-shift reactions. July 18, 2000: US06090312 (104 worldwide citation)


New process designs are presented for reforming reactions of steam with hydrocarbons (such as methane, natural gas, light hydrocarbon feedstocks with one to four carbon atoms in each molecule), also for the water gas shift reaction that is of steam with carbon monoxide; also for carbon dioxide refor ...


2
John V O Brien, Arthur S Holmes, Richard B Hopewell: Process for the separation of landfill gas. Koch Process Systems, Richard P Crowley, July 21, 1987: US04681612 (90 worldwide citation)


A recycle process for the separation of landfill gas containing a wide variety of impurities into a carbon dioxide product stream and a fuel-grade-pressurized methane product stream, the process providing for the removal of both the impurities and the carbon dioxide in a cryogenic column as a bottom ...


3
Stanley W Zison, Alex Roqueta: Landfill gas recovery system and method with pressure symmetry. Getty Synthetic Fuels, Gordon L Peterson, September 4, 1984: US04469176 (88 worldwide citation)


In a landfill gas recovery system, the breakthrough danger is minimized, and the system efficiency is improved, by providing pressure-equalizing low-impedance gas paths such as aggregate-filled symmetry trenches positioned within the landfill and surrounding, at least partially, the primary collecti ...


4
Shivaji Sircar, Ravi Kumar, William R Koch, John VanSloun: Recovery of methane from land fill gas. Air Products and Chemicals, Geoffrey L Chase, William F Marsh, James C Simmons, September 13, 1988: US04770676 (78 worldwide citation)


High purity methane and carbon dioxide are recovered from landfill gas in an integrated multi-column adsorption system having a temperature swing adsorption section (TSA) for pretreatment of the crude landfill gas to remove trace impurities therefrom, the thus cleaned gas being fed to a pressure swi ...


5
Shivaji Sircar: Regeneration of adsorbents. Air Products and Chemicals, Geoffrey L Chase, William F Marsh, James C Simmons, November 15, 1988: US04784672 (73 worldwide citation)


In the recovery of methane and carbon dioxide from landfill gas (LFG) a selective adsorption system is employed having a pretreat section operated in temperature swing adsorption mode (TSA) to remove water and trace hydrocarbon contaminants, in flow communication with a pressure swing adsorption sec ...


6
Stanley W Zison: Landfill gas recovery method. Getty Synthetic Fuels, Gordon L Peterson, April 17, 1984: US04442901 (73 worldwide citation)


A method of collecting landfill gas from a landfill comprising providing a porous collector in the landfill having a relatively broad collection zone in the path of migrating landfill gas, controlling the pressure in the collector to induce the landfill gas near the collector to flow into the collec ...


7
J Richard Watson, Beryl Koplin: Process and apparatus for purification of landfill gases. Bio Gas Development, Hurt Richardson Garner Todd & Cadenhead, October 22, 1991: US05059405 (71 worldwide citation)


A process and apparatus for removing the impurities from a gas stream produced from a landfill such that essentially pure carbon dioxide and methane is recovered. After the landfill gas is mechanically dewatered, the gas is filtered of particulate solids and aerosols and purified by removing sulfur ...


8
Robert D Johnson, Robert S Altmann: Method for testing and monitoring for producing landfill gas. NRG Nufuel Company, Reserve Synthetic Fuels, Gordon L Peterson, May 31, 1977: US04026355 (64 worldwide citation)


A method of withdrawing landfill gas from a landfill without drawing air into the landfill comprising providing a well in the landfill and withdrawing landfill gas from the well at a plurality of different withdrawal rates. The pressure at a selected region within the landfill is detected while the ...


9
Lawrence A Siwajek, W Jeffrey Cook, William R Brown: Landfill gas recovery. Acrion Technologies, Pearne Gordon McCoy & Granger, December 1, 1998: US05842357 (61 worldwide citation)


A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a reduced amount of carbon dioxide absorbent which itself may be an in situ derived and recoverable constituent. Separated methane may be concentrated in ...


10
Fawzy T Abdelmalek, Michael J Rutsch: Process for solids waste landfill gas treatment and separation of methane and carbon dioxide. Peoples Hale & Coleman, July 1, 1997: US05642630 (58 worldwide citation)


Waste landfill gases are treated and separated by a combination of gas cleaning, gas compression, gas cooling, and gas absorption processes to produce high quality liquefied natural gas, liquefied carbon dioxide and compressed natural gas products.



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