![\"Carbon](\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/carbon_dioxide_long_chiet_xuat_chat_long_sieu_toi_han_giat_kho.png\")
<\/p>\nCarbon Dioxide L\u1ecfng, Chi\u1ebft Xu\u1ea5t Ch\u1ea5t L\u1ecfng Si\u00eau T\u1edbi H\u1ea1n, Gi\u1eb7t Kh\u00f4: C\u00e1ch s\u1eed d\u1ee5ng CO2 si\u00eau t\u1edbi h\u1ea1n trong c\u00f4ng nghi\u1ec7p \u0111\u1ec3 chi\u1ebft xu\u1ea5t tinh ch\u1ea5t v\u00e0 gi\u1eb7t kh\u00f4 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n
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Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, carbon dioxide l\u1ecfng (CO2<\/sub>(l)) v\u00e0 qu\u00e1 tr\u00ecnh chi\u1ebft xu\u1ea5t ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n (supercritical fluid extraction – SFE) \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. Nh\u1eefng \u1ee9ng d\u1ee5ng n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng m\u00e0 c\u00f2n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1edbi thi\u1ec7u v\u1ec1 carbon dioxide l\u1ecfng, chi\u1ebft xu\u1ea5t ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n v\u00e0 gi\u1eb7t kh\u00f4.<\/p>\n Carbon dioxide l\u1ecfng l\u00e0 tr\u1ea1ng th\u00e1i l\u1ecfng c\u1ee7a CO2<\/sub> khi \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh. \u1ede \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n, CO2<\/sub> t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng kh\u00ed. Tuy nhi\u00ean, khi \u00e1p su\u1ea5t t\u0103ng l\u00ean tr\u00ean 5.1 bar v\u00e0 nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi -56.6\u00b0C, CO2<\/sub> s\u1ebd tr\u1edf th\u00e0nh ch\u1ea5t l\u1ecfng. CO2<\/sub>(l) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p, bao g\u1ed3m:<\/p>\n Chi\u1ebft xu\u1ea5t ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u00ean ti\u1ebfn trong k\u1ef9 thu\u1eadt h\u00f3a h\u1ecdc s\u1eed d\u1ee5ng CO2<\/sub> \u1edf tr\u1ea1ng th\u00e1i si\u00eau t\u1edbi h\u1ea1n (supercritical). \u1ede tr\u1ea1ng th\u00e1i n\u00e0y, CO2<\/sub> c\u00f3 t\u00ednh ch\u1ea5t c\u1ea3 c\u1ee7a kh\u00ed v\u00e0 l\u1ecfng, cho ph\u00e9p n\u00f3 th\u1ea9m th\u1ea5u v\u00e0o c\u00e1c v\u1eadt li\u1ec7u gi\u1ed1ng nh\u01b0 kh\u00ed, nh\u01b0ng c\u0169ng h\u00f2a tan c\u00e1c ch\u1ea5t nh\u01b0 l\u1ecfng. \u0110i\u1ec1u n\u00e0y l\u00e0m cho CO2<\/sub> si\u00eau t\u1edbi h\u1ea1n tr\u1edf th\u00e0nh dung m\u00f4i l\u00fd t\u01b0\u1edfng \u0111\u1ec3 chi\u1ebft xu\u1ea5t c\u00e1c ch\u1ea5t c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb th\u1ef1c v\u1eadt, th\u1ef1c ph\u1ea9m v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m t\u1ef1 nhi\u00ean kh\u00e1c.<\/p>\n Gi\u1eb7t kh\u00f4 l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u00e0m s\u1ea1ch qu\u1ea7n \u00e1o m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng n\u01b0\u1edbc. Thay v\u00e0o \u0111\u00f3, dung m\u00f4i ho\u1eb7c c\u00e1c ch\u1ea5t l\u1ecfng kh\u00e1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf v\u1ebft b\u1ea9n v\u00e0 ch\u1ea5t b\u1ea9n. M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p gi\u1eb7t kh\u00f4 hi\u1ec7n \u0111\u1ea1i nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng CO2<\/sub> l\u1ecfng:<\/p>\n C\u00f4ng ngh\u1ec7 gi\u1eb7t kh\u00f4 v\u1edbi CO2<\/sub> \u0111ang d\u1ea7n tr\u1edf th\u00e0nh xu h\u01b0\u1edbng, thay th\u1ebf cho c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng s\u1eed d\u1ee5ng perchloroethylene (Perc), m\u1ed9t dung m\u00f4i g\u00e2y h\u1ea1i cho s\u1ee9c kh\u1ecfe v\u00e0 m\u00f4i tr\u01b0\u1eddng.<\/p>\n Nh\u00ecn chung, nh\u1eefng \u1ee9ng d\u1ee5ng c\u1ee7a carbon dioxide l\u1ecfng v\u00e0 chi\u1ebft xu\u1ea5t ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n \u0111em l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch v\u1ec1 m\u1eb7t kinh t\u1ebf v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng. Kh\u00e1m ph\u00e1 v\u00e0 \u00e1p d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta ti\u1ebfn g\u1ea7n h\u01a1n \u0111\u1ebfn m\u1ed9t t\u01b0\u01a1ng lai b\u1ec1n v\u1eefng h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":" Carbon Dioxide L\u1ecfng, Chi\u1ebft Xu\u1ea5t Ch\u1ea5t L\u1ecfng Si\u00eau T\u1edbi H\u1ea1n, Gi\u1eb7t Kh\u00f4: C\u00e1ch s\u1eed d\u1ee5ng CO2 si\u00eau t\u1edbi h\u1ea1n trong c\u00f4ng nghi\u1ec7p \u0111\u1ec3 chi\u1ebft xu\u1ea5t tinh ch\u1ea5t v\u00e0 gi\u1eb7t kh\u00f4 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"\nCarbon Dioxide L\u1ecfng (CO2<\/sub>(l))<\/h2>\n
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Chi\u1ebft Xu\u1ea5t Ch\u1ea5t L\u1ecfng Si\u00eau T\u1edbi H\u1ea1n (SFE)<\/h2>\n
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Gi\u1eb7t Kh\u00f4 V\u1edbi CO2<\/sub><\/h2>\n
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