Sorbents for removal of mercury

Patent metadata

Field	Value
Publication number	US-2017080402-A1
Application number	US-201615368900-A
Country	US
Kind code	A1
Filing date	Dec 5, 2016
Priority date	Jun 11, 2012
Publication date	Mar 23, 2017
Grant date	—

Abstract

Methods and systems for reducing mercury emissions from fluid streams are provided herein, as are adsorbent materials having high volumetric iodine numbers.

First claim

What is claimed is:

1 . A mercury adsorptive material comprising an adsorptive material having a volumetric iodine number of greater than about 450 mg/cc.

2 . The mercury adsorptive material of claim 1 , wherein the volumetric iodine number is about 500 mg/cc to about 650 mg/cc.

3 . The mercury adsorptive material of claim 1 , wherein the volumetric iodine number is about 500 mg/cc to about 700 mg/cc.

4 . The mercury adsorptive material of claim 1 , wherein the adsorptive material is selected from the group consisting of activated carbon, reactivated carbon, graphite, graphene carbon black, zeolite, silica, silica gel, clay, and combinations thereof.

5 . The mercury adsorptive material of claim 1 , wherein the adsorptive material is an activated carbon derived from coal.

6 . The mercury adsorptive material of claim 1 , wherein the adsorptive material has a mean particle diameter (MPD) of about 1 μm to about 30 μm.

7 . The mercury adsorptive material of claim 1 , further comprising one or more oxidizing agent.

8 . The mercury adsorptive material of claim 7 , wherein the one or more oxidizing agent is selected from the group consisting of chlorine, bromine, iodine, ammonium bromide, ammonium chloride, calcium hypochlorite, calcium hypobromite, calcium hypoiodite, calcium chloride, calcium bromide, calcium iodide, magnesium chloride, magnesium bromide, magnesium iodide, sodium chloride, sodium bromide, sodium iodide, potassium tri-chloride, potassium tri-bromide, potassium tri-iodide, and combinations thereof.

9 . The mercury adsorptive material of claim 7 , wherein the one or more oxidizing agent comprises about 5 wt. % to about 50 wt. % of a total adsorptive material.

10 . The mercury adsorptive material of claim 1 , further comprising one or more nitrogen source.

11 . The mercury adsorptive material of claim 10 , wherein the one or more nitrogen source is selected from the group consisting of ammonium containing compounds, ammonia containing compounds, amines containing compounds, amides containing compounds, imines containing compounds, quaternary ammonium containing compounds, and combinations thereof.

12 . The mercury adsorptive material of claim 10 , wherein the one or more nitrogen source is selected from the group consisting of ammonium iodide, ammonium bromide, or ammonium chloride, amine halides, a quaternary ammonium halides, and combinations thereof.

13 . The mercury adsorptive material of claim 10 , wherein the one or more nitrogen source comprises about 5 wt. % to about 50 wt. % of a total adsorptive material.

14 . The mercury adsorptive material of claim 1 , further comprising an alkaline agent.

15 . The mercury adsorptive material of claim 14 , wherein the alkaline agent is selected from the group consisting of alkaline agent may be calcium carbonate, calcium oxide, calcium hydroxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, sodium carbonate, sodium bicarbonate, trisodium hydrogendicarbonate dihydrate, and combinations thereof.

16 . The mercury adsorptive material of claim 14 , wherein the alkaline agent is provided at a concentration of greater than or equal to about 0.15 equivalents per 100 grams of absorptive material.

17 . A mercury adsorptive material comprising:
an adsorptive material having a volumetric iodine number of greater than about 450 mg/cc; one or more oxidizing agent; and one or more nitrogen source.

18 . The mercury adsorptive material of claim 17 , wherein the volumetric iodine number is about 500 mg/cc to about 650 mg/cc.

19 . The mercury adsorptive material of claim 17 , wherein the volumetric iodine number is about 500 mg/cc to about 700 mg/cc.

20 . The mercury adsorptive material of claim 17 , wherein the adsorptive material is selected from the group consisting of activated carbon, reactivated carbon, graphite, graphene carbon black, zeolite, silica, silica gel, clay, and combinations thereof.

21 . The mercury adsorptive material of claim 17 , wherein the one or more oxidizing agent is selected from the group consisting of chlorine, bromine, iodine, ammonium bromide, ammonium chloride, calcium hypochlorite, calcium hypobromite, calcium hypoiodite, calcium chloride, calcium bromide, calcium iodide, magnesium chloride, magnesium bromide, magnesium iodide, sodium chloride, sodium bromide, sodium iodide, potassium tri-chloride, potassium tri-bromide, potassium tri-iodide, and combinations thereof.

22 . The mercury adsorptive material of claim 17 , wherein the one or more nitrogen source is selected from the group consisting of ammonium iodide, ammonium bromide, or ammonium chloride, amine halides, a quaternary ammonium halides, and combinations thereof.

23 . A mercury adsorptive material comprising:
an adsorptive material having a volumetric iodine number of greater than about 450 mg/cc; one or more oxidizing agent; and one or more alkaline agent.

24 . The mercury adsorptive material of claim 23 , wherein the volumetric iodine number is about 500 mg/cc to about 650 mg/cc.

25 . The mercury adsorptive material of claim 23 , wherein the volumetric iodine number is about 500 mg/cc to about 700 mg/cc.

26 . The mercury adsorptive material of claim 23 , wherein the adsorptive material is selected from the group consisting of activated carbon, reactivated carbon, graphite, graphene carbon black, zeolite, silica, silica gel, clay, and combinations thereof.

27 . The mercury adsorptive material of claim 23 , wherein the one or more oxidizing agent is selected from the group consisting of chlorine, bromine, iodine, ammonium bromide, ammonium chloride, calcium hypochlorite, calcium hypobromite, calcium hypoiodite, calcium chloride, calcium bromide, calcium iodide, magnesium chloride, magnesium bromide, magnesium iodide, sodium chloride, sodium bromide, sodium iodide, potassium tri-chloride, potassium tri-bromide, potassium tri-iodide, and combinations thereof.

28 . The mercury adsorptive material of claim 23 , wherein the alkaline agent is selected from the group consisting of alkaline agent may be calcium carbonate, calcium oxide, calcium hydroxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, sodium carbonate, sodium bicarbonate, trisodium hydrogendicarbonate dihydrate, and combinations thereof.

29 . A system for removing mercury from flue gas, the system comprising an adsorptive material having a volumetric iodine number of greater than 450 mg/cc.

30 . The system of claim 29 , wherein the volumetric iodine number is about 500 mg/cc to about 650 mg/cc.

31 . The system of claim 29 , wherein the volumetric iodine number is about 500 mg/cc to about 700 mg/cc.

32 . The system of claim 29 , wherein the adsorptive material is selected from the group consisting of activated carbon, reactivated carbon, graphite, graphene carbon black, zeolite, silica, silica gel, clay, and combinations thereof.

33 . The system of claim 29 , wherein the adsorptive material is an activated carbon derived from coal.

34 . The system of claim 29 , wherein the adsorptive material has a mean particle diameter (MPD) of about 1 μm to about 30 μm.

35 . The system of claim 29 , further comprising one or more oxidizing agent.

Assignees

• Calgon Carbon Corp

Inventors

• Tramposch Walter G
• Mimna Richard A

Classifications

• B01D2257/602

  Mercury or mercury compounds · CPC title

• B01D2251/402

  of magnesium · CPC title

• B01D2253/25

  Coated, impregnated or composite adsorbents · CPC title

• B01J20/02 Primary

  comprising inorganic material · CPC title

• B01D53/64

  Heavy metals or compounds thereof, e.g. mercury · CPC title