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Effects of amine, amine salt and amide on the behaviour of carbon dioxide absorption into calcium hydroxide suspension to precipitate calcium carbonate
作者姓名:Wittaya Chuajiw  Mitsuru Nakano  Kazumasa Takatori  Toshiya Kojim  Yoshiki Wakimoto  Yoshiaki Fukushima
作者单位:Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Tenpaku Moon Chome, Nagoya, Aichi 468-8511, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan;Aisin Seiki Co., Ltd., 2-1, Asahi-machi, Kariya, Aichi 448-8650, Japan;Aisin Seiki Co., Ltd., 2-1, Asahi-machi, Kariya, Aichi 448-8650, Japan;Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Tenpaku Moon Chome, Nagoya, Aichi 468-8511, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan
摘    要:The amount of carbon dioxide (CO2) absorption and calcium ion (Ca^2+) concentration besides the pH of aqueous solution were observed during the COz absorption to precipitate calcium carbonate (CaCO3) from calcium hydroxide (Ca(OH)2). A reaction rate-limiting effect of an amount of CO2 absorption without any organic additives in the early stage of the precipitation was observed, which was attributed to an interruption effect of bicarbonate ion (HCO3) on the precipitation of CaCO3. The improvement for the reaction rate was achieved not only by amine additives but also by neutral additives such as ε-caprolactam or amine salt. When the hexamethylene diamine was dissolved in the solution, successive change of crystal forms of CaCO3 aragonite to calcite in aqueous suspensions, confirmed by Ca^2+ concentration change and X-ray diffraction, was concluded that a local environment around the amine group in aqueous solution and an interaction of the diamine with precipitated CaCO3 particles were important factors for these reactions.

关 键 词:ε-己内酰胺  沉淀碳酸钙  氢氧化钙  二氧化碳  吸收量  悬浮液  胺盐  Ca(OH)2
收稿时间:1/6/2013 12:00:00 AM
修稿时间:3/7/2013 12:00:00 AM

Effects of amine, amine salt and amide on the behaviour of carbon dioxide absorption into calcium hydroxide suspension to precipitate calcium carbonate
Wittaya Chuajiw,Mitsuru Nakano,Kazumasa Takatori,Toshiya Kojim,Yoshiki Wakimoto,Yoshiaki Fukushima.Effects of amine, amine salt and amide on the behaviour of carbon dioxide absorption into calcium hydroxide suspension to precipitate calcium carbonate[J].Journal of Environmental Sciences,2013,25(12):2507-2515.
Authors:Wittaya Chuajiw  Mitsuru Nakano  Kazumasa Takatori  Toshiya Kojim  Yoshiki Wakimoto and Yoshiaki Fukushima
Institution:Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Tenpaku Moon Chome, Nagoya, Aichi 468-8511, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan;Aisin Seiki Co., Ltd., 2-1, Asahi-machi, Kariya, Aichi 448-8650, Japan;Aisin Seiki Co., Ltd., 2-1, Asahi-machi, Kariya, Aichi 448-8650, Japan;Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Tenpaku Moon Chome, Nagoya, Aichi 468-8511, Japan;Toyota Central R&D Labs. Inc., Yokomichi, Nagakute, Aichi 480-1192, Japan
Abstract:The amount of carbon dioxide (CO2) absorption and calcium ion (Ca2+) concentration besides the pH of aqueous solution were observed during the CO2 absorption to precipitate calcium carbonate (CaCO3) from calcium hydroxide (Ca(OH)2). A reaction rate-limiting effect of an amount of CO2 absorption without any organic additives in the early stage of the precipitation was observed, which was attributed to an interruption effect of bicarbonate ion (HCO3) on the precipitation of CaCO3. The improvement for the reaction rate was achieved not only by amine additives but also by neutral additives such as ε-caprolactam or amine salt. When the hexamethylene diamine was dissolved in the solution, successive change of crystal forms of CaCO3 aragonite to calcite in aqueous suspensions, confirmed by Ca2+ concentration change and X-ray diffraction, was concluded that a local environment around the amine group in aqueous solution and an interaction of the diamine with precipitated CaCO3 particles were important factors for these reactions.
Keywords:carbon dioxide absorption  calcium carbonate precipitation  local functional group interaction
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