Patent · US Active

Tar recovery from gasification of a carbonaceous feedstock

US9051517B2 · kind B2 · utility

0Cited by

3References

12Claims

0Family size

Assignee

SASOL TECHNOLOGY PROPRIETARY LIMITED · ZA

Inventors

Gerhard Schmitt · Bensheim, DE
Paul Smit Baumann · Johannesburg, ZA
Johannes Willem Van Zyl · Melbourne, AU

Key dates

Filing date	Dec 21, 2011
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Dec 21, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P30/20
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method (100) of recovering tar from the gasification of a carbonaceous feedstock includes gasifying (12) a carbonaceous feedstock (14) to produce a raw gas (20) which includes at least CO, H2, tar and entrained solids, the raw gas (20) being at a temperature of at least 250° C. and a pressure of at least 15 bar (g). The raw gas (20) is quenched and washed (22) with a quench liquid (24) producing a solids-containing liquid stream (32) which includes tars, the solids-containing liquid stream being at a temperature of at least 150° C. and a pressure of at least 15 bar (g). Solids (56) are separated (46) from the solids-containing liquid stream (32) to provide a tar recovery stream (102). The tar recovery stream (102) is treated by at least cooling (34) and pressure expansion (36) thereof to produce a tar stream (58).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.