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US 8,148,435 B2Granted
Integrated coal to liquids process and system
AssigneeAccelergy Corporation
InventorRocco A. Fiato
Life of this patent
Estimating the term…
Abstract
An integrated coal-to-liquids process is provided to minimize carbon dioxide emissions and efficiently make use of carbon resources, by recovering carbon dioxide emissions from Coal-to-Liquids (CTL) facilities, using the recovered carbon dioxide in at least one carbonylation reaction step for converting ammonia to urea and then converting urea into dimethyl carbonate.
Claims26
An integrated process for converting a coal containing feed to liquids comprising the steps of:
- a. converting a major portion of the coal containing feed to liquids by direct liquefaction and upgrading said liquids to produce distillate products;
- b. gasifying a minor portion of the coal containing feedstock to produce syngas;
- c. gasifying biomass to produce syngas;
- d. converting syngas produced by steps b and c to methanol;
- e. reacting CO2 produced by one or more of the gasification steps with ammonia to form urea;
- f. reacting urea produced by step e with methanol produced by step c to produce dimethyl carbonate and ammonia;
- and
- g. using ammonia produced in step a and/or f as a reactant in step e.
5 more elements
A process for converting a coal containing feed to liquids comprising the steps of:
- a. converting at least a major portion of the coal containing feed to liquids by direct liquefaction and upgrading said liquids to produce distillate products;
- b. gasifying biomass to produce syngas;
- c. converting syngas produced by step b to liquids;
- d. increasing the hydrogen content of the feed in step a by supplementing said feed with hydrogen in the syngas produced in step b;
- e. reacting CO2 produced by one or more of the above steps and water to form algae by photosynthesis;
- f. hydro-processing algae produced in step e to form hydrocarbons;
- and
- g. using algae residue produced by the hydro-processing in step f as biomass in step b.
5 more elements
A process for converting a carbonaceous feed to liquids comprising the steps of:
- a. converting at least a major portion of the carbonaceous feed to liquids by direct liquefaction and upgrading said liquids to produce distillate products;
- b. gasifying an algae or algae residue containing biomass feed to produce syngas;
- c. converting syngas produced by step b to liquids;
- d. increasing the hydrogen content of the feed in step a by supplementing said feed with hydrogen in the syngas produced in step b;
- e. producing algae by photosynthesis using CO2 produced by one or more of the above steps;
- and
- f. supplying algae produced in step e, or algae residue produced by hydroprocessing algae produced in step e, as algae or algae residue containing biomass feed in step b.
4 more elements
Dependencies are inferred from the claim text.