发明名称 |
Brominated sorbents for removing mercury from emissions produced during fuel combustion |
摘要 |
Activated cellulosic-based carbon is rendered more thermally stable by exposure to water or aqueous acid, and optionally, to a halogen and/or a halogen-containing compound. Such treated cellulosic-based carbon has enhanced thermal properties and is suitable for use in mitigating the content of hazardous substances in flue gases, especially flue gases having a temperature within the range of from about 100° C. to about 420° C. |
申请公布号 |
US9089834(B2) |
申请公布日期 |
2015.07.28 |
申请号 |
US201113819464 |
申请日期 |
2011.08.19 |
申请人 |
ALBEMARLE CORPORATION |
发明人 |
Nalepa Christopher J.;Lambeth Gregory H.;Zhou Qunhui;O'Dwyer Jonathan P. |
分类号 |
C01B31/08;B01J20/20;B01D53/02;B01D53/64 |
主分类号 |
C01B31/08 |
代理机构 |
|
代理人 |
Hoefling Marcy M.;Jubinsky James A.;Dunn Nathan C. |
主权项 |
1. A process for enhancing the thermal stability of a thermally-activated cellulosic-based carbon, which process comprises extracting the thermally-activated cellulosic-based carbon with a composition comprising water or an aqueous acid, and halogenating the extracted thermally-activated cellulosic-based carbon with halogen and/or halogen-containing compound at a temperature from about 82 to about 105° C. for a period of time within the range of from about 0.1 to about 3 seconds, such that the extracted thermally-activated cellulosic-based carbon has at least one of the following: (i) a temperature of initial energy release greater than the temperature of initial energy release for the same thermally-activated cellulosic-based carbon prior to the extraction; (ii) a self-sustaining ignition temperature greater than the self-sustaining ignition temperature for the same thermally-activated cellulosic-based carbon prior to the extraction; or (iii) an early stage energy release value that is less than the early stage energy release value for the same thermally-activated cellulosic-based carbon prior to the extraction. |
地址 |
Baton Rouge LA US |