Kellogg Brown + Root LLC

Richard B Strait

Daniel Joseph Barnett

John Abughazaleh

Peter Van Smith

Systems and methods for gasifying a feedstock are provided. A feedstock can be introduced to a riser. A first oxidant can be introduced to a first mixing zone within the riser, thereby generating a first high temperature zone within the first mixing zone proximate an entry point of the first oxidant. A first stream of water can be introduced to the first high temperature zone to reduce the temperature therein. A second oxidant can be introduced to a second mixing zone within the riser, thereby generating a second high temperature zone within the second mixing zone proximate an entry point of the second oxidant. A second stream of water can be introduced to the second high temperature zone to reduce the temperature therein. The feedstock and the first and second oxidants can be gasified in a gasification zone within the riser.

Water quench for gasifier

Systems and processes for producing one or more products from syngas are provided. A feedstock can be gasified in the presence of an oxidant to provide a syngas comprising carbon dioxide, carbon monoxide, and hydrogen. At least a portion of the syngas can be combusted to provide an exhaust gas. At least a portion of the exhaust gas can be introduced to a channel having one or more reaction zones at least partially disposed therein, wherein the one or more reaction zones are in indirect heat exchange with the exhaust gas, wherein the one or more reaction zones comprises one or more catalyst-containing tubes. A reactant can be reacted in at least one of the one or more reaction zones to provide one or more reactor products.

Pseudoisothermal ammonia process

Ammonia is produced in a reactor in which pseudoisothermal conditions can be approached by convective cooling of a reaction zone of the reactor by positioning at least a portion of the reaction zone in indirect contact with a flow of hot gas such as exhaust gas or preheated air. The hot gas may be supplied from a fired heater, a boiler, a reformer, a process air preheat furnace, a gas turbine, or the like. The reactor converts a feed stream of a purge gas or syngas to ammonia. The method may be implemented in a primary synthesis loop or in a purge gas loop of a new ammonia plant, or by retrofitting an existing ammonia plant. Cooperatively installed with a primary ammonia synthesis loop, the reactor increases total ammonia production.

Ammonia is produced in a reactoror, in which pseudoisothermal conditions can be approached by convective cooling of a reaction zone of the reactor by positioning at least a portion of the reaction zone in indirect contact with a flow of hot gas such as exhaust gasor preheated air. The hot gasmay be supplied from a fired heater, a boiler, a reformer, a process air preheat furnace, a gas turbine, or the like. The reactor converts a feed stream of a purge gasor syngas to ammonia. The method may be implemented in a primary synthesis loop (as at) or in a purge gas loopof a new ammonia plant, or by retrofitting an existing ammonia plant. Cooperatively installed with a primary ammonia synthesis loop, the reactor increases total ammonia production.

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Porter, TX, United States of America

Richard B Strait