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US 10,414,649 B2Granted
Integrated system and method for removing acid gas from a gas stream
AssigneeResearch Triangle Institute
InventorsDavid L. Denton, Raghubir P. Gupta, Brian S. Turk, Vijay Gupta, Himanshu Paliwal
Life of this patent
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Abstract
Acid gas compounds are removed from a process gas such as, for example, syngas or natural gas, by flowing a feed gas into a desulfurization unit to remove a substantial fraction of sulfur compounds from the feed gas and flowing the resulting desulfurized gas into a CO2 removal unit to remove a substantial fraction of CO2 from the desulfurized gas.
Claims30
A method for removing acid gases from a gas stream, the method comprising:
- flowing a feed gas into a desulfurization unit to remove a fraction of one or more sulfur compounds from the feed gas, wherein the desulfurization unit produces a desulfurized gas, wherein, within the desulfurization unit, a carrier gas flowing therein includes regenerated solid particulate sorbent being returned to the desulfurization unit from a regeneration unit;
- and
- flowing the desulfurized gas into a CO2 removal unit to remove a fraction of CO2 from the desulfurized gas.
A method for removing acid gases from a gas stream, the method comprising:
- flowing a feed gas stream comprising carbon monoxide (CO), carbon dioxide (CO2), and a sulfur compound into contact with a sorbent stream in an adsorber unit to produce a first output gas stream, wherein the sorbent stream comprises a particulate sorbent compound effective for removing the sulfur compound from the feed gas stream, and the first output gas stream comprises a desulfurized gas comprising CO and CO2, and a sulfided sorbent;
- separating the desulfurized gas from the sulfided sorbent;
- flowing the sulfided sorbent into contact with a regenerating agent in a regenerator unit to produce a second output gas stream, wherein the regenerating agent has a composition effective for removing sulfur from the sulfided sorbent, and the second output gas stream comprises regenerated sorbent compound and a sulfur compound;
- separating the regenerated sorbent compound from the sulfur compound;
- flowing the regenerated sorbent compound in a carrier gas into the adsorber unit for reuse in desulfurization;
- and
- flowing the desulfurized gas into contact with a CO2 removing agent in a CO2 removal unit to produce a treated gas comprising CO and reduced fractions of sulfur and CO2.
4 more elements
Dependencies are inferred from the claim text.