COMPOSITIONS AND METHODS FOR SEQUESTERING FLUE GAS MERCURY IN CONCRETE

PROBLEM TO BE SOLVED: To provide a carbonaceous mercury sorbent capable of sequestering mercury adsorbed from a flue gas in concrete containing air-entraining admixtures.SOLUTION: A carbonaceous mercury sorbent is a carbon char made from coconut shell, wood or lignite that has been activated by a me...

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Hauptverfasser:	RONALD R LANDRETH, NALEPA CHRISTOPHER J, ZHOU QUNHUI, SIDNEY G NELSON JR, YINZHI ZHANG
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a carbonaceous mercury sorbent capable of sequestering mercury adsorbed from a flue gas in concrete containing air-entraining admixtures.SOLUTION: A carbonaceous mercury sorbent is a carbon char made from coconut shell, wood or lignite that has been activated by a method selected from the group consisting of activating with steam, activating with CO, activating in an environment containing free oxygen, and combinations thereof. The carbonaceous mercury sorbent has an Acid Blue 80 Index of less than about 30 milligrams per gram of carbon, may be injected into a flue gas stream containing fly ash and mercury, and allows subsequent removal of the fly ash from the gas stream.SELECTED DRAWING: Figure 1 【課題】燃料排ガスから吸着された水銀を、空気連行混合物を含有するコンクリートにおいて封鎖することができる、炭素質水銀吸着材を提供する。【解決手段】蒸気、又はＣＯ2による活性化、遊離酸素を含有する環境における活性化、およびこれらの組み合わせからなる群から選択される方法により活性化されたヤシ殻、木材、または亜炭から作製される炭素チャー（ｃａｒｂｏｎｃｈａｒ）であって、炭素１グラムあたり約３０ミリグラム未満のアシッドブルー８０指標を有し、フライアッシュおよび水銀を含有する燃料排ガス流に注入することができ、その後フライアッシュをガス流から除去することができる、炭素質水銀吸着材。【選択図】図１