Process and apparatus for the production of methanol from condensed carbonaceous material
First Claim
1. An intergrated recycle process for the production of methanol from a condensed carbonaceous feedstock selected from the group consisting of coal, biomass, wood, agricultural products and municipal solid wastes comprising:
- a) hydrogasifying said feedstock in a hydrogasification reactor with a recycled hydrogen rich gas stream to produce a process gas stream rich in methane;
b) steam pyrolyzing said process gas stream in a second stage steam pyrolysis reactor in the presence of a catalyst to produce a synthesis gas containing mainly carbon monoxide and hydrogen with small amounts of carbon dioxide;
c) reacting said carbon monoxide and hydrogen synthesis gas in a third stage methanol synthesis reactor in the presence of a catalyst to form a product gas stream containing methanol;
d) removing said methanol from said product gas stream leaving product gas stream rich in hydrogen; and
e) recycling said hydrogen rich product gas stream to supply the hydrogen needs for the above hydrogasifying step.
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Abstract
An intergrated recycle process for the production of methanol from a process synthesis gas produced by hydrogasification of a condensed carbonaceous feedstock to produce a process gas which is reacted in a steam pyrolysis reactor with additional natural gas and steam to produce said synthesis gas containing hydrogen and carbon monoxide in more than a 2:1 molar ratio which constituents in turn are reacted in a methanol synthesis reactor to produce methanol. The important factor in this process includes the sequence of reactors of the condensed carbonaceous material: a hydrogasification reactor; the stream and natural gas pyrolysis reactor; the methanol synthesis reactor and the recycling to the hydrogasification reactor of the hydrogen-rich gas stream remaining after the methanol synthesis and separation of the methanol product.
54 Citations
11 Claims
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1. An intergrated recycle process for the production of methanol from a condensed carbonaceous feedstock selected from the group consisting of coal, biomass, wood, agricultural products and municipal solid wastes comprising:
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a) hydrogasifying said feedstock in a hydrogasification reactor with a recycled hydrogen rich gas stream to produce a process gas stream rich in methane; b) steam pyrolyzing said process gas stream in a second stage steam pyrolysis reactor in the presence of a catalyst to produce a synthesis gas containing mainly carbon monoxide and hydrogen with small amounts of carbon dioxide; c) reacting said carbon monoxide and hydrogen synthesis gas in a third stage methanol synthesis reactor in the presence of a catalyst to form a product gas stream containing methanol; d) removing said methanol from said product gas stream leaving product gas stream rich in hydrogen; and e) recycling said hydrogen rich product gas stream to supply the hydrogen needs for the above hydrogasifying step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification