Related Experiment Video
Updated: Jun 9, 2026
Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
Treatment of gaseous hydrogen chloride using Mg-Al layered double hydroxide intercalated with carbonate ion
Tomohito Kameda1, Naoya Uchiyama, Toshiaki Yoshioka
1Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan. kameda@env.che.tohoku.ac.jp
Abstract:
It is important to treat gaseous HCl from incineration streams efficiently to avoid adverse environmental consequences. In this paper, a new treatment method for gaseous HCl is presented-the application of Mg-Al layered double hydroxide (LDH) intercalated with CO(3)(2-) (CO(3)·Mg-Al LDH) to treat gaseous HCl continuously. The degree of HCl removal without water vapor is higher than that with water vapor; further, this reaction does not require H(2)O. In addition, the degree of HCl removal increases with increasing temperature, CO(3)·Mg-Al LDH quantity, HCl concentration, and improved contact between CO(3)·Mg-Al LDH and HCl gas. The treatment of HCl gas by CO(3)·Mg-Al LDH leads to the production of Mg-Al LDH intercalated with Cl(-). Further, HCl is also absorbed on the surface of CO(3)·Mg-Al LDH. Our proposed treatment method works effectively for the treatment of gaseous HCl from incinerator streams.
Related Concept Videos
01:14Acid Halides to Ketones: Gilman Reagent
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen double...
01:19Acid Halides to Alcohols: LiAlH4 Reduction
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
01:15Acid Halides to Alcohols: Grignard Reaction
Grignard reagents are a source of carbanions and function as nucleophiles. The mechanism begins with the nucleophilic attack by the carbanion at the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs,...
01:01Acid Halides to Carboxylic Acids: Hydrolysis
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic acid...
02:35Electrophilic Addition to Alkynes: Hydrohalogenation
01:17Carboxylic Acids to Primary Alcohols: Hydride Reduction