Mercury removal catalyst and method of making and using same

• US 6,258,334 B1
• Filed: 03/20/2000
• Issued: 07/10/2001
• Est. Priority Date: 07/28/1997
• Status: Expired due to Term

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Tao, Tinghong, Gadkaree, Kishor P.
• Primary Examiner(s): Wood, Elizabeth D.
• Application Number:
  US09/528,616
• Time in Patent Office: 477 Days
• Field of Search: 423/210, 423/215.5, 210/660, 210/679, 951/34, 959/01
• US Class Current: 423/210
• CPC Class Codes: B01D 53/8665 Removing heavy metals or compounds thereof, e.g. mercury
• CPC Class Codes: B01J 21/18 Carbon
• CPC Class Codes: B01J 23/78 with alkali- or alkaline earth metals
• CPC Class Codes: B01J 27/02 Sulfur, selenium or tellurium; Compounds thereof
• CPC Class Codes: B01J 35/00 Catalysts, in general, characterised by their form or physical properties
• CPC Class Codes: B01J 35/30 characterised by their physical properties
• CPC Class Codes: B01J 37/084 Decomposition of carbon-containing compounds into carbon
• CPC Class Codes: C01B 32/372 Coating; Grafting; Microencapsulation
• CPC Class Codes: Y10S 95/901 Activated carbon

Abstract

An activated carbon catalyst having sulfur dispersed homogeneously thereon, the sulfur being chemically bonded to the activated carbon. A method of making the catalyst involves forming an intimate mixture of a synthetic carbon precursor and a sulfur-containing material, curing the carbon precursor, carbonizing the carbon precursor, activating the carbonized carbon precursor to produce an activated carbon catalyst having sulfur chemically bonded to said activated carbon and uniformly dispersed thereon.

Claims

1. A method of removing mercury from a mercury-containing fluid stream, the method comprising passing the stream over an activated carbon catalyst having sulfur chemically bonded to said activated carbon and uniformly dispersed thereon to cause removal of essentially all of the mercury from the stream.

2. A method of claim 1 wherein the temperature of the fluid stream ranges from ambient temperature to about 300°

C.

3. A method of claim 2 wherein the temperature of the fluid stream is about 100°

C. to about 200°

C.