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Enhancement of Mercury Sorbent Using Metal Aluminate Carbonates with Chloride under Hydrothermal Conditions
Author(s) -
Yu ChingTsung,
Lin HuiMei
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201600210
Subject(s) - sorbent , chemistry , calcination , coprecipitation , mercury (programming language) , hydroxide , aluminate , chloride , inorganic chemistry , nuclear chemistry , metal ions in aqueous solution , oxide , metal , adsorption , cement , catalysis , metallurgy , organic chemistry , materials science , computer science , programming language
Mercury sorbents M–Al– CO 3 ( M =Mg 2+ , Mn 2+ , Fe 2+ , Cu 2+ , or Zn 2+ ) were prepared by the coprecipitation of M 2 + and Al 3+ in an alkaline NaOH / Na 2 CO 3 solution. The formation of a layered double hydroxide structure significantly enhanced Hg removal, uniquely with a suitable binder as a support. Both Hg( NO 3 ) 2 and HgCl 2 were used to perform the capture test. The calcined sorbent exhibited superior efficiency, particularly for materials having bivalent states of mixed oxide ( MO ), such as calcined Mn and Fe. Chloride ions effectively raised the mercury scrubber efficiency, regardless of the type of sorbent. The results show that synthetic sorbents can provide 96% removal of Hg at 200°C. In addition, a suitable binder such as TiO 2 can be used as a support for dispersing metal oxides, which significantly decreases the MO content while maintaining a high equivalent capture capacity.