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US 8,772,360 B2Granted
Generating methanol using ultrapure, high pressure hydrogen
AssigneeGTLpetrol LLC
InventorRodney J. Allam
Life of this patent
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Abstract
In various implementations, methanol is produced using a (CO+H2) containing synthesis gas produced from a combined PDX plus EHTR or a combined ATR plus EHTR at a pressure of 70 bar to 100 bar at the correct stoichiometric composition for methanol synthesis so that no feed gas compressor is required for the feed to the methanol synthesis reactor loop.
Claims11
A method for producing methanol, comprising;
- producing oxygen in an air separation plant with air compressors driven by a gas turbine;
- heating a hydrocarbon feed stream using exhaust from the gas turbine;
- exothermically reacting a first portion of the heated hydrocarbon feed stream with at least one of steam or an oxidant gas comprising molecular oxygen to produce an exothermically generated syngas product;
- endothermically reforming a second portion of the hydrocarbon feed stream with steam over a catalyst in a heat exchange reformer to produce an endothermically-reformed syngas product, wherein at least a portion of heat used in generation of the endothermically-reformed syngas product is obtained by recovering heat from the exothermically-generated syngas product and the endothermically reformed syngas product;
- combining the exothermically generated syngas product and the endothermically-reformed syngas product to produce a combined syngas stream;
- producing steam in a waste heat boiler by cooling the combined syngas stream, where the combined syngas stream leaving the waste heat boiler has a pressure from 70 bar to 100 bar;
- separating water from the cooled combined syngas to produce a methanol plant feed at substantially reaction loop pressure and having less than about 2% CH4 and less than about 0.2% H2O;
- after separating water, passing the cooled combined syngas to a methanol plant;
- and
- combining methanol plant combustible effluent with methane fuel to the gas turbine.
7 more elements
Dependencies are inferred from the claim text.