Methods for feedstock pretreatment and transport to gasification
US8888875B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2006 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jul 27, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods for pretreating feedstock for gasification are provided. At least a portion of a coal based feedstock stream can be combined with at least a portion of a supercritical carbon dioxide stream within a pretreatment system to provide a treated feedstock stream. At least a portion of the treated feedstock stream can be passed to a gasifier to produce a synthesis gas stream of less than 50% by volume carbon dioxide, at least 5% by volume carbon monoxide and at least 1% by volume hydrogen. At least a portion of the synthesis gas stream can be combusted to form an exhaust stream comprising carbon dioxide. At least a portion of the gasification byproduct stream can be purified and compressed to produce supercritical carbon dioxide. At least a portion of the supercritical carbon dioxide can be recycled to the pretreatment system via a supercritical carbon dioxide stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.