Process and system for syngas treatment
AssigneeAir Products and Chemicals, Inc.
InventorsGowri Krishnamurthy, Charles Roland Higdon, III, Christine Peck Kretz, Carmine Richard Gagliardi, Kevin M. Duffy, Kuo-Kuang Hsu
Life of this patent
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Abstract
A process for the clean-up of a crude syngas stream having widely varying composition and particulate load. The process includes quenching the crude syngas stream with a liquid stream to cool the syngas stream and remove particulates, tars and heavier hydrocarbon compounds. The process further includes co-scrubbing the syngas stream to remove both HCl and NH3 from the syngas stream, removing particulate matter from the syngas stream, and removing sulfur from the syngas stream. A syngas treatment system is also disclosed.
Claims19
A process for treating a syngas stream, the process comprising:
- quenching the syngas stream with a liquid stream to cool the syngas stream and remove particulates;
- co-scrubbing the syngas stream to remove both HCl and ammonia from the syngas stream;
- removing additional particulate matter from the syngas stream;
- and
- removing sulfur from the syngas stream to form a clean syngas stream;
- wherein the process is a unitary process comprising simultaneously contacting water with the syngas stream to cool the syngas stream, removing the particulates from the syngas stream, and removing the ammonia and HCl from the syngas stream, where the syngas stream is the effluent of a waste gasifier and wherein there are no intermediate steps between the gasifier and the unitary process.
A process for the clean-up of a syngas stream arising from waste gasification, the process comprising:
- providing a syngas stream from a waste gasification system, wherein the syngas stream comprises from about 10,000 to 50,000 mg/Nm3 particulates;
- quenching the syngas stream with a liquid stream to cool the syngas stream and remove at least one member selected from the group consisting of particulates, tars, other heavy hydrocarbon compounds and combinations thereof;
- co-scrubbing the syngas stream to remove both HCl and NH3 from the syngas stream;
- removing additional particulate matter from the syngas stream;
- and
- removing sulfur from the syngas stream to form the clean syngas stream,
- wherein the clean syngas stream comprises less than about 50 mg/Nm3 particulates;
- wherein quenching the syngas stream, co-scrubbing the syngas stream, and removing particulates from the syngas stream are simultaneously a unitary process, and there are no intermediate steps between the gasification system and the quenching step.
Dependencies are inferred from the claim text.