Michael W Donahue

US Patent:

6544406, Apr 8, 2003

Filed:

Dec 8, 1997

Appl. No.:

08/986449

Inventors:

David W. Warren - Sun Valley CA
Michael B. Donahue - Monrovia CA

Assignee:

Harvest Energy Technology Inc. - Sun Valley CA

International Classification:

C10G 916

US Classification:

208 48R, 208 48 AA, 585648

Abstract:

The formation of coke on metal surfaces exposed to hydrocarbons in a thermal cracking process is reduced by ion implantation of selected antifoulants into such metal surfaces; the antifoulants being chosen from a group of primary elements consisting of aluminum, silicon, and chromium, or combinations thereof, and a group of secondary elements consisting of calcium, lithium, potassium, magnesium, cesium, hafnium, yttrium and zirconium, or combinations thereof.

US Patent:

6585785, Jul 1, 2003

Filed:

Oct 27, 2000

Appl. No.:

09/696575

Inventors:

David W. Warren - Van Nuys CA
Michael B. Donahue - La Verne CA

Assignee:

Harvest Energy Technology, Inc. - Sun Valley CA

International Classification:

B01J 800

US Classification:

481279, 48119, 48123, 48113, 48102 A, 422107, 422110, 422111, 422204, 422211

Abstract:

A fuel processor apparatus comprising a catalytic tubular reactor is heated using an infrared radiant burner to provide the endothermic heat of reaction needed to reform a mixture of hydrocarbon and steam for the production of a hydrogen-rich gas stream. The hydrogen-rich gas stream is further purified using a sequence of catalytic steps that is fed to a fuel cell whereupon a portion of the hydrogen contained in the gas stream is consumed for the production of electricity by electrochemical reaction with oxygen. An unused portion of the purified hydrogen-rich gas stream exits the fuel cell stack and is combusted in the infrared radiant burner. A fuel cell control system rapidly responds to a variable fuel cell electric demand by adjusting the feed of hydrocarbon to the catalytic tubular reactor to maintain the surface temperature of the infrared radiant burner within defined limits.

US Patent:

7074373, Jul 11, 2006

Filed:

Nov 13, 2000

Appl. No.:

09/709616

Inventors:

David W. Warren - Van Nuys CA, US
Michael B. Donahue - La Verne CA, US

Assignee:

Harvest Energy Technology, Inc. - Sun Valley CA

International Classification:

B01J 8/02
C01B 3/48

US Classification:

422198, 422211, 422220, 422200, 423655

Abstract:

A thermally-integrated lower temperature water-gas shift reactor apparatus for converting carbon monoxide in the presence steam comprises a catalyst bed that is disposed within an outer region surrounding a waste heat recovery steam generator operating at a selected pressure corresponding to the optimum temperature for conducting the catalytic water-gas shift reaction and a process for useful recovery of the exothermic heat of reaction to generate steam that is used in a process for the conversion of hydrocarbon feedstock into useful gases such as hydrogen.