Sorbent comprising activated carbon, process for making same and use thereof
First Claim
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1. A sorbent body comprising:
- an activated carbon matrix defining a plurality of pores;
sulfur; and
an additive adapted for promoting the abatement of at least one of As, Cd, Hg and Se from a fluid stream,wherein;
the additive is distributed throughout the activated carbon matrix.
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Abstract
A sorbent body adapted for abating toxic elements from a fluid stream, such as a carbon combustion flue gas stream or a syngas stream produced in coal gasification process, and process for making such sorbent. The sorbent body comprises an activated carbon matrix defining a plurality of pores, sulfur and an additive adapted for promoting the abatement of toxic elements from the fluid stream. At least one of the additive is formed into the sorbent body by in-situ forming such as in-situ extrusion. The sorbent is useful for abatement of, e.g., arsenic, cadmium, mercury and selenium from gas streams.
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Citations
25 Claims
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1. A sorbent body comprising:
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an activated carbon matrix defining a plurality of pores; sulfur; and an additive adapted for promoting the abatement of at least one of As, Cd, Hg and Se from a fluid stream, wherein; the additive is distributed throughout the activated carbon matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A process for making a sorbent body comprising an activated carbon matrix, sulfur, and an additive adapted for promoting the abatement of a toxic element from a fluid stream, wherein the additive is distributed throughout the activated carbon matrix,
comprising the following steps: -
(A) providing a batch mixture body formed of a batch mixture material comprising a carbon-source material, a sulfur-source material, an additive-source material and an optional filler material, wherein the additive-source material is substantially homogeneously distributed in the mixture; (B) carbonizing the batch mixture body by subjecting the batch mixture body to an elevated carbonizing temperature in an O2-depleted atmosphere; and (C) activating the carbonized batch mixture body at an elevated activating temperature in a gaseous atmosphere selected from CO2, H2O, a mixture of CO2 and H2O, a mixture of CO2 and nitrogen, a mixture of H2O and nitrogen, and a mixture of CO2 and another inert gas. - View Dependent Claims (17, 18, 19, 20)
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21. An extruded batch mixture body comprising:
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(I) a carbon-source material comprising an uncured, curable polymeric resin; (II) particles of sulfur-containing material; (III) an additive adapted for promoting the abatement of a toxic element from a fluid stream; wherein the additive is distributed substantially homogeneously in the material forming the extruded batch mixture body. - View Dependent Claims (22, 23)
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24. An extruded batch mixture body according to claim 38, comprising from 20% to 50% by weight of inorganic material other than carbon, sulfur-containing inorganic material, water and the additive.
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25. A process for abating As, Cd, Se and/or Hg from a fluid stream, comprising placing a sorbent body in the fluid stream, wherein the sorbent body comprises:
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an activated carbon matrix defining a plurality of pores; sulfur; and an additive adapted for promoting the abatement of at least one of As, Cd, Hg and Se from a fluid stream, wherein; the additive is distributed throughout the activated carbon matrix.
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Specification