Carbon monoxide absorption by aqueous CuCl-MgCl2 absorbent.

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概要

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• Carbon monoxide absorption characteristics of an aqueous CuCl–MgCl<SUB>2</SUB> solution system are clarified. A CuCl 3.7 mol/l–MgCl<SUB>2</SUB> 4.7 mol/l solution is found to absorb 2.2 mol of CO per liter at 30°C and <I>P</I><SUB>co</SUB>=2×10<SUP>4</SUP> Pa. This is 8 times greater than a CuCl 3.2 mol/l–HCl 8.2 mol/l solution and 16 times greater than a CuCl 4.8 mol/l–KCl 5.9 mol/l solution. The CO absorption of the concentrated aqueous solution of CuCl–MgCl<SUB>2</SUB> is accompanied with fine particle precipitation. This precipitate, which consists of CO, Cu<SUP>+</SUP>, Mg<SUP>2+</SUP>, Cl<SUP>−</SUP>, and H<SUB>2</SUB>O, is estimated to be CO·CuMgCl<SUB>3</SUB>·<I>n</I>H<SUB>2</SUB>O. The complex completely releases CO at 70°C or above. Chloride ion influence on the formation of CO·CuMgCl<SUB>3</SUB>·<I>n</I>H<SUB>2</SUB>O is discussed.

• 公益社団法人 日本化学会の論文

著者

• Kanehori Keiichi

  Central Research Laboratory Hitachi Ltd

• Katsumoto Masayuki

  Central Research Laboratory, Hitachi Ltd.

• Kamiguchi Taiji

  Kure Research Laboratory

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