Air Products and Chemicals, Inc.

Tsun-Chiu Robert Tsao

Xiang-Dong Peng

James Christian Sorensen

Joseph Klosek

Bharat Lajjaram Bhatt

John J Lewnard

Barry Wayne Diamond

Alan Donald Anderson

Michael Bryant

Douglas Edward Benedict

A control scheme is set forth for conversion of variable composition synthesis gas to liquid fuels in a three-phase or slurry bubble column reactor (SBCR). The control scheme allows one to achieve constant or optimum liquid fuel production and constant or limited purge gas flow with highly variable synthesis gas feed condition. This is accomplished by adjusting one or more of the following independent variables: recycle ratio, water addition, and bypass flow.

Control scheme for conversion of variable composition synthesis gas to liquid fuels in a slurry bubble column reactor

An improvement to the process for separating dimethyl ether (DME) from byproducts in a one-step catalytic conversion of synthesis gas (syngas), the improvement comprising using a scrubbing solvent comprising a mixture of dimethyl ether and methanol for the separation of dimethyl ether and carbon dioxide from the unconverted synthesis gas in a scrubbing column. Additional improvements include recycling of the scrubbing solution, multi-step processing of the liquid effluent from the scrubber, and methods of processing the methanol-water effluent of the flash column that is interposed between the DME reactor and the scrubber.

Separation process for one-step production of dimethyl ether from synthesis gas

A process is set forth for directly controlling the quantity and particle size distribution of the solid inventory inside a circulating fluidized bed combustor. A portion of the bed ash is withdrawn from the combustor as bottom ash. The particle size distribution of the stream is adjusted, such as by a hammermill, to a specified distribution. Finally, a portion of the adjusted ash is re-injected into the combustor. The process may be facilitated by size classifying the bottom ash prior to size reduction.

Circulating fluidized bed combustor with bottom ash re-injection

Growing community of inventors

Allentown, PA, United States of America

Tsun-Chiu Robert Tsao