John A Presto, Age 684 Rolling Hill Rd, East Haddam, CT 06423

4190641, Feb 26, 1980

Dec 6, 1978

5/966929

John Presto - Hebron CT

United Technologies Corporation - Hartford CT

C01B 102
C01B 118

423653

In a method for producing high quality hydrogen, the carbon monoxide level of a hydrogen stream which also contains hydrogen sulfide is shifted in a bed of iron oxide shift catalyst to a desired low level of carbon monoxide using less catalyst than the minimum amount of catalyst which would otherwise be required if there were no hydrogen sulfide in the gas stream. Under normal operating conditions the presence of even relatively small amounts of hydrogen sulfide can double the activity of the catalyst such that much less catalyst may be used to do the same job.

4202865, May 13, 1980

Oct 30, 1978

5/956300

John Presto - Hebron CT

United Technologies Corporation - Hartford CT

B01J 800
C10G 2302

423244

A hydrotreating catalyst is regenerated as it concurrently hydrotreats a hydrocarbon fuel by introducing a low concentration of oxygen into the catalyst bed either continuously or periodically. At low oxygen concentrations the carbon deposits on the catalyst are burned off without harming the catalyst and without significantly affecting the hydrotreating process. In a preferred embodiment the hydrotreating process is hydrodesulfurization, and regenerating is done periodically with oxygen concentrations between 0. 1 and 0. 5 volume percent.

5792572, Aug 11, 1998

May 31, 1996

8/656569

Peter F. Foley - Manchester CT
Francis J. Luczak - Glastonbury CT
John Presto - Hebron CT
Christopher R. Teeling - Enfield CT
Richard D. Breault - North Kingston RI
Robert R. Fredley - Tolland CT
Glenn W. Scheffler - Tolland CT

International Fuel Cells, Inc. - So. Windsor CT

H01M 806

429 20

Ammonia which is found in fuel cell fuel gases is removed therefrom by passing the fuel gas stream through a scrubber bed of porous carbon pellets containing phosphoric acid. The ammonia reacts with the phosphoric acid in the scrubber bed to form ammonium phosphate compounds which remain in the scrubber bed. The ammonia content of the fuel gas stream is thus lowered to a concentration of about one ppm or less. By maintaining the temperature of the fuel gas stream passing through the scrubber bed in a range of about 400. degree. F. to about 450. degree. F. sufficient phosphoric acid will also be evaporated from the scrubber bed to replace acid electrolyte lost during operation of the power plant. Adjustments in the temperature of the fuel gas flowing through the scrubber may be made in order to match electrolyte losses which occur during different operating phases of the power plant. The scrubber formed in accordance with this invention thus serves two functions, one being to remove ammonia from the fuel gas stream, and the other being to replenish electrolyte lost in the power plant during normal operation thereof.

5830423, Nov 3, 1998

Nov 22, 1995

8/561684

John C. Trocciola - Glastonbury CT
Roger R. Lesieur - Enfield CT
John Presto - Hebron CT
Richard A. Sederquist - Newington CT

International Fuel Cells Corp. - S. Windsor CT

C01B 700
B01J 800
B01D 5334

42324409

The gas stream which is produced in and emanates from landfills, anaerobic digesters and other waste gas streams, is treated to produce a purified gas which is essentially a hydrocarbon such as methane and which can be used as the fuel source in a fuel cell power plant. The gas stream passes through a simplified purification system which removes essentially all of the sulfur compounds, hydrogen sulfide, and halogen compounds from the gas stream. The resultant gas stream can be used to power a fuel cell power plant which produces electricity, or as a hydrocarbon fuel gas for other applications.