# US 10,766,016 B2 · Sorbent composition for use in a flue gas train including a baghouse > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,016 B2 - Document ID: US10766016B2 - Status: Granted - Kind: B2 - Application number: 14/957,552 - Filed: 2015-12-02 - Published: 2016-07-28 - Granted: 2020-09-08 - Earliest claimed: 2014-12-02 - Assignees: ADA Carbon Solutions, LLC - Applicants: ADA Carbon Solutions, LLC - Inventors: Mowen Li; Sarah G. McMurray; Robert B. Huston; Joseph M. Wong - Web page: https://patentgrep.com/patent/US10766016B2 ## CPC - B01J 20/20: comprising free carbon; comprising carbon obtained by carbonising processes - B01J 20/28004: {Sorbent size or size distribution, e.g. particle size} - B01J 20/28016: {Particle form} - B01J 20/2803: {Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products} - B01J 2220/42: Materials comprising a mixture of inorganic materials (materials coated or impregnated on a carrier B01J20/32) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS ## Abstract A sorbent composition for enhanced baghouse function is described. The composition may include a sorbent such as powder activated carbon as well as an additive that is a heat moderator or a permeability agent. The heat moderator may act as a heat sink or barrier. Heat moderators may include in non-limiting examples phyllosilicates, cyclosilicates, or nesosilicates that may include, montmorillonite, bentonite, halloysite, aluminum silicates, muscovite, illite, kaolin, andalusite, kyanite, sillimanite, metakaolin, mullite, polymers, such as chitosan, and/or clays, either natural or synthetic (e.g., montmorillonite), or polyethylenimine. Permeability may be affected by mixing sorbents of lower D50 with sorbents of higher D50 in various ratios, or addition of a permeability agent such as a phyllosilicate, perlite, silica, diatomaceous earth. Further, a permeability agent such as a fluoropolymer may be coated onto or admixed with the sorbent. Diatomaceous earth, perlites, or silicates may also increase permeability. The compositions are particularly useful in flue gas treatment systems with baghouse separation units in that they have reduced combustibility and increased permeability properties. ## Claims ### Claim 1 A sorbent composition that enhances baghouse unit performance, the sorbent composition comprising: a first particulate sorbent comprising powdered activated carbon and having a median particle diameter of not greater than about 30 μm and at least about 20 μm; and a second particulate sorbent comprising powdered activated carbon and having a median particle diameter of not greater than about 20 μm and at least about 8 μm, wherein the median particle diameter of the second particulate sorbent is at least about 5 μm less than the median particle diameter of the first particulate sorbent, wherein a pressure drop as measured in a permeability test under an applied normal stress of 15 kPa at an air velocity of 0.5 mm/s is not greater than about 78 mBar. ### Claim 2 (depends on 1) The composition of claim 1, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is not greater than about 5:1. ### Claim 3 (depends on 1) The composition of claim 1, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is not greater than about 4:1. ### Claim 4 (depends on 1) The composition of claim 1, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 1:6. ### Claim 5 (depends on 1) The composition of claim 1, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 1:1 ### Claim 6 (depends on 1) The composition of claim 1, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 2:1. ### Claim 7 (depends on 1) The composition of claim 1, further comprising an oxidizing agent. ### Claim 8 (depends on 7) The composition of claim 7, wherein the oxidizing agent comprises an inorganic halogen salt. ### Claim 9 (depends on 1) The composition of claim 1, further comprising a flow aid selected from the group consisting of graphite, talc, mica and combinations thereof. ### Claim 10 (depends on 1) The composition of claim 1, wherein the sorbent composition comprises not more than about 10 wt. % of sorbent particles having a size of less than 5 μm based on a total sorbent composition. ### Claim 11 (depends on 1) The composition of claim 1, further comprising a permeability additive selected from the group consisting of perlite, silica, diatomaceous earth, zeolites, and combinations thereof ### Claim 12 A sorbent composition that enhances baghouse unit performance comprising a particulate sorbent having a median particle diameter (D50) of not greater than about 30 μm, and a permeability additive comprising perlite, wherein a pressure drop as measured in a permeability test under an applied normal stress of 15 kPa at an air velocity of 0.5 mm/s is not greater than about 78 mBar. ### Claim 13 (depends on 12) The composition of claim 12, wherein the pressure drop as measured in a permeability test under an applied normal stress of 15 kPa at an air velocity of 0.5 mm/s is not greater than about 65 mBar. ### Claim 14 (depends on 12) The composition of claim 12, wherein the pressure drop as measured in a permeability test under an applied normal stress of 15 kPa at an air velocity of 0.5 mm/s is not greater than about 50 mBar. ### Claim 15 (depends on 12) The composition of claim 12, wherein the composition comprises at least about 0.5 wt.% of the permeability additive. ### Claim 16 (depends on 12) The composition of claim 12, wherein the composition comprises not greater than about 10 wt.% of the permeability additive. ### Claim 17 (depends on 12) The composition of claim 12, further comprising an oxidizing agent. ### Claim 18 (depends on 17) The composition of claim 17, wherein the oxidizing agent comprises an inorganic halogen salt. ### Claim 19 (depends on 12) The composition of claim 12, wherein the particulate sorbent comprises powdered activated carbon. ### Claim 20 A sorbent composition that enhances baghouse unit performance, the sorbent composition comprising: a first particulate sorbent comprising powdered activated carbon and having a median particle diameter of not greater than about 30 μm and at least about 20 μm; and a second particulate sorbent comprising powdered activated carbon and having a median particle diameter of not greater than about 20 μm and at least about 8 μm, wherein the median particle diameter of the second particulate sorbent is at least about 5 μm less than the median particle diameter of the first particulate sorbent. ### Claim 21 (depends on 20) The composition of claim 20, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is not greater than about 5:1. ### Claim 22 (depends on 20) The composition of claim 20, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is not greater than about 4:1. ### Claim 23 (depends on 20) The composition of claim 20, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 1:6. ### Claim 24 (depends on 20) The composition of claim 20, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 1:1 ### Claim 25 (depends on 20) The composition of claim 20, wherein a weight ratio of the first particulate sorbent to the second particulate sorbent is at least about 2:1. ### Claim 26 (depends on 20) The composition of claim 20, further comprising an oxidizing agent. ### Claim 27 (depends on 26) The composition of claim 26, wherein the oxidizing agent comprises an inorganic halogen salt. ### Claim 28 (depends on 20) The composition of claim 20, further comprising a flow aid selected from the group consisting of graphite, talc, mica and combinations thereof. ### Claim 29 (depends on 20) The composition of claim 20, wherein the sorbent composition comprises not more than about 10 wt. % of sorbent particles having a size of less than 5 μm based on a total sorbent composition. ### Claim 30 (depends on 20) The composition of claim 20, further comprising a permeability additive selected from the group consisting of perlite, silica, diatomaceous earth, zeolites, and combinations thereof.