{"id":6417,"date":"2026-02-05T18:28:56","date_gmt":"2026-02-06T02:28:56","guid":{"rendered":"https:\/\/3waycatalyst.com\/?p=6417"},"modified":"2026-02-05T18:28:59","modified_gmt":"2026-02-06T02:28:59","slug":"three-way-catalytic-converter-coating-thickness","status":"publish","type":"post","link":"https:\/\/3waycatalyst.com\/vi\/three-way-catalytic-converter-coating-thickness\/","title":{"rendered":"B\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u: 5 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 t\u0103ng \u0111\u1ed9 d\u00e0y v\u00e0 hi\u1ec7u qu\u1ea3."},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u<\/h2>\n\n\n\n

Ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i \u0111ang \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c quy \u0111\u1ecbnh m\u00f4i tr\u01b0\u1eddng nghi\u00eam ng\u1eb7t<\/a> li\u00ean quan \u0111\u1ebfn kh\u00ed th\u1ea3i t\u1eeb \u1ed1ng x\u1ea3.\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>\u00a0B\u1ed9 ph\u1eadn n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 tuy\u1ebfn ph\u00f2ng th\u1ee7 ch\u00ednh ch\u1ed1ng l\u1ea1i c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m \u0111\u1ed9c h\u1ea1i. N\u00f3 chuy\u1ec3n \u0111\u1ed5i carbon monoxide, hydrocarbon v\u00e0 oxit nit\u01a1 th\u00e0nh c\u00e1c ch\u1ea5t \u00edt \u0111\u1ed9c h\u1ea1i h\u01a1n. Hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1 v\u00e0 vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 m\u00f4i tr\u01b0\u1eddng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o hi\u1ec7u qu\u1ea3 c\u1ee7a b\u1ed9 ph\u1eadn n\u00e0y. C\u1ee5 th\u1ec3, \u0111\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 x\u00fac t\u00e1c quy\u1ebft \u0111\u1ecbnh hi\u1ec7u qu\u1ea3 x\u1eed l\u00fd kh\u00ed th\u1ea3i c\u1ee7a thi\u1ebft b\u1ecb. C\u00e1c k\u1ef9 s\u01b0 ph\u1ea3i c\u00e2n b\u1eb1ng l\u01b0\u1ee3ng kim lo\u1ea1i qu\u00fd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi \u0111\u1ed9 d\u00e0y v\u1eadt l\u00fd c\u1ee7a l\u1edbp ph\u1ee7. M\u1ed9t l\u1edbp qu\u00e1 d\u00e0y s\u1ebd h\u1ea1n ch\u1ebf d\u00f2ng kh\u00ed v\u00e0 l\u00e0m t\u0103ng \u00e1p su\u1ea5t ng\u01b0\u1ee3c. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t l\u1edbp qu\u00e1 m\u1ecfng s\u1ebd thi\u1ebfu di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ea7n thi\u1ebft cho c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc ho\u00e0n ch\u1ec9nh.<\/p>\n\n\n\n

Vai tr\u00f2 c\u01a1 b\u1ea3n c\u1ee7a \u0111\u1ed9 d\u00e0y l\u1edbp trong hi\u1ec7u qu\u1ea3<\/h2>\n\n\n\n

L\u1edbp x\u00fac t\u00e1c b\u00ean trong\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong>\u00a0<\/a>N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t v\u00f9ng ph\u1ea3n \u1ee9ng ph\u1ee9c t\u1ea1p. N\u00f3 bao g\u1ed3m c\u00e1c kim lo\u1ea1i qu\u00fd nh\u01b0 b\u1ea1ch kim, paladi v\u00e0 rhodium \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 tr\u00ean m\u1ed9t l\u1edbp ph\u1ee7 g\u1ed1m c\u00f3 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t l\u1edbn. \u0110\u1ed9 d\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn "ranh gi\u1edbi ba pha" n\u01a1i kh\u00ed th\u1ea3i, ch\u1ea5t x\u00fac t\u00e1c r\u1eafn v\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng c\u1ee7a ph\u1ea3n \u1ee9ng g\u1eb7p nhau.<\/p>\n\n\n\n

Nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng ph\u1ea1m vi \u0111\u1ed9 d\u00e0y t\u1ed1i \u01b0u<\/a> \u0110\u1ed1i v\u1edbi c\u00e1c l\u1edbp n\u00e0y. M\u1eb7c d\u00f9 c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i \u0111\u1ed9ng c\u01a1, nh\u01b0ng ph\u1ea1m vi t\u1eeb 2 \u0111\u1ebfn 4 \u03bcm th\u01b0\u1eddng mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1t nh\u1ea5t. Trong v\u00f9ng n\u00e0y, h\u1ec7 th\u1ed1ng \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng t\u1ed1i \u0111a m\u00e0 kh\u00f4ng b\u1ecb h\u1ea1n ch\u1ebf \u0111\u00e1ng k\u1ec3 v\u1ec1 kh\u1ea3 n\u0103ng v\u1eadn chuy\u1ec3n.<\/p>\n\n\n\n

C\u00e1c v\u1ecb tr\u00ed ho\u1ea1t \u0111\u1ed9ng n\u1eb1m r\u1ea3i r\u00e1c kh\u1eafp c\u1ea5u tr\u00fac x\u1ed1p c\u1ee7a l\u1edbp ph\u1ee7. N\u1ebfu l\u1edbp ph\u1ee7 qu\u00e1 m\u1ecfng, kh\u00ed th\u1ea3i s\u1ebd \u0111i qua b\u1ed9 chuy\u1ec3n \u0111\u1ed5i qu\u00e1 nhanh. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng "tr\u01b0\u1ee3t", trong \u0111\u00f3 c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m ch\u01b0a ph\u1ea3n \u1ee9ng tho\u00e1t ra kh\u1ecfi \u1ed1ng x\u1ea3. N\u1ebfu l\u1edbp ph\u1ee7 qu\u00e1 d\u00e0y, c\u00e1c ph\u1ea7n b\u00ean trong c\u1ee7a l\u1edbp ph\u1ee7 s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Kh\u00ed th\u1ea3i kh\u00f4ng th\u1ec3 th\u00e2m nh\u1eadp \u0111\u1ee7 s\u00e2u v\u00e0o c\u1ea5u tr\u00fac tr\u01b0\u1edbc khi lu\u1ed3ng kh\u00ed \u0111\u1ea9y n\u00f3 ra ngo\u00e0i. Do \u0111\u00f3, t\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 d\u00e0y gi\u00fap t\u1ed1i \u0111a h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c kim lo\u1ea1i qu\u00fd \u0111\u1eaft ti\u1ec1n.<\/p>\n\n\n\n

So s\u00e1nh k\u1ef9 thu\u1eadt c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a l\u1edbp ph\u1ee7<\/h2>\n\n\n\n

B\u1ea3ng sau \u0111\u00e2y t\u00f3m t\u1eaft \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c m\u1ee9c \u0111\u1ed9 \u0111\u1ed9 d\u00e0y kh\u00e1c nhau \u0111\u1ebfn c\u00e1c th\u00f4ng s\u1ed1 v\u1eadn h\u00e0nh c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb.\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong><\/a>.<\/p>\n\n\n\n

M\u1ee9c \u0111\u1ed9 d\u00e0y<\/th>T\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n kh\u00ed<\/th>S\u1eed d\u1ee5ng kim lo\u1ea1i qu\u00fd<\/th>\u0110\u1ed9 b\u1ec1n<\/th>T\u00e1c \u0111\u1ed9ng \u00e1p su\u1ea5t ng\u01b0\u1ee3c<\/th><\/tr><\/thead>
Si\u00eau m\u1ecfng (<\/strong><\/td>Xu\u1ea5t s\u1eafc<\/td>Th\u1ea5p (Thi\u1ebfu trang web)<\/td>K\u00e9m (L\u00e3o h\u00f3a nhanh)<\/td>Kh\u00f4ng \u0111\u00e1ng k\u1ec3<\/td><\/tr>
T\u1ed1i \u01b0u (2\u20134 \u03bcm)<\/strong><\/td>C\u00e2n b\u1eb1ng<\/td>Cao<\/td>Good<\/td>V\u1eeba ph\u1ea3i<\/td><\/tr>
D\u00e0y (> 5 \u03bcm)<\/strong><\/td>H\u1ea1n ch\u1ebf<\/td>L\u1ee3i t\u1ee9c gi\u1ea3m d\u1ea7n<\/td>Xu\u1ea5t s\u1eafc<\/td>Cao<\/td><\/tr>
Qu\u00e1 l\u1edbn (> 10 \u03bcm)<\/strong><\/td>Ng\u1eadp l\u1ee5t nghi\u00eam tr\u1ecdng<\/td>R\u1ea5t th\u1ea5p<\/td>T\u1ed1i \u0111a<\/td>Nghi\u00eam tr\u1ecdng<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u0110i\u1ec7n tr\u1edf truy\u1ec1n kh\u1ed1i v\u00e0 \u0111\u1ed9 khu\u1ebfch t\u00e1n kh\u00ed<\/h2>\n\n\n\n

V\u1eadn chuy\u1ec3n kh\u00ed l\u00e0 m\u1ed9t tr\u1edf ng\u1ea1i \u0111\u00e1ng k\u1ec3 trong thi\u1ebft k\u1ebf ch\u1ea5t x\u00fac t\u00e1c.\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>\u00a0Ph\u1ea3i x\u1eed l\u00fd m\u1ed9t l\u01b0\u1ee3ng l\u1edbn kh\u00ed th\u1ea3i trong v\u00f2ng mili gi\u00e2y. Khi \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 t\u0103ng l\u00ean, \u0111i\u1ec7n tr\u1edf truy\u1ec1n kh\u1ed1i c\u0169ng t\u0103ng theo.<\/p>\n\n\n\n

Nh\u1eefng c\u00e2u ng\u1eafn g\u1ecdn gi\u00fap l\u00e0m r\u00f5 qu\u00e1 tr\u00ecnh n\u00e0y. Kh\u00ed \u0111i v\u00e0o l\u1edbp ph\u1ee7 x\u1ed1p. N\u00f3 di chuy\u1ec3n v\u1ec1 ph\u00eda c\u00e1c v\u1ecb tr\u00ed kim lo\u1ea1i ho\u1ea1t t\u00ednh. C\u00e1c l\u1edbp d\u00e0y h\u01a1n t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng \u0111i d\u00e0i h\u01a1n cho c\u00e1c ph\u00e2n t\u1eed kh\u00ed n\u00e0y. \u0110\u01b0\u1eddng \u0111i d\u00e0i h\u01a1n n\u00e0y l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 th\u1ebf khu\u1ebfch t\u00e1n. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, kh\u00ed kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn ch\u1ea5t x\u00fac t\u00e1c \u0111\u1ee7 nhanh \u0111\u1ec3 ph\u1ea3n \u1ee9ng.<\/p>\n\n\n\n

C\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng \u201cModulus Thiele\u201d \u0111\u1ec3 m\u00f4 t\u1ea3 m\u1ed1i quan h\u1ec7 n\u00e0y. Modulus cao cho th\u1ea5y t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng nhanh h\u01a1n nhi\u1ec1u so v\u1edbi t\u1ed1c \u0111\u1ed9 khu\u1ebfch t\u00e1n. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady, ch\u1ec9 c\u00f3 l\u1edbp v\u1ecf ngo\u00e0i c\u1ee7a l\u1edbp ph\u1ee7 ch\u1ea5t x\u00fac t\u00e1c tham gia v\u00e0o ph\u1ea3n \u1ee9ng. B\u1eb1ng c\u00e1ch gi\u1ea3m \u0111\u1ed9 d\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t l\u00e0m gi\u1ea3m s\u1ee9c c\u1ea3n khu\u1ebfch t\u00e1n. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng to\u00e0n b\u1ed9 th\u1ec3 t\u00edch kim lo\u1ea1i qu\u00fd \u0111\u1ec1u tham gia v\u00e0o qu\u00e1 tr\u00ecnh l\u00e0m s\u1ea1ch.<\/p>\n\n\n\n

G\u00f3c nh\u00ecn m\u1edbi: Kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef oxy v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a l\u1edbp ph\u1ee7 kh\u00ed.<\/h2>\n\n\n\n

M\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ee7a\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong>\u00a0<\/a>Li\u00ean quan \u0111\u1ebfn Kh\u1ea3 n\u0103ng L\u01b0u tr\u1eef Oxy (OSC). C\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 Ceria (CeO2) trong l\u1edbp ph\u1ee7 l\u01b0u tr\u1eef oxy trong c\u00e1c chu k\u1ef3 \u0111\u1ed9ng c\u01a1 ngh\u00e8o nhi\u00ean li\u1ec7u v\u00e0 gi\u1ea3i ph\u00f3ng n\u00f3 trong c\u00e1c chu k\u1ef3 gi\u00e0u nhi\u00ean li\u1ec7u. \u0110\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 trao \u0111\u1ed5i oxy n\u00e0y.<\/p>\n\n\n\n

L\u1edbp ph\u1ee7 d\u00e0y h\u01a1n c\u00f3 th\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c nhi\u1ec1u oxy h\u01a1n. Tuy nhi\u00ean, s\u1ee9c c\u1ea3n b\u00ean trong c\u1ee7a l\u1edbp d\u00e0y l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh gi\u1ea3i ph\u00f3ng oxy. \u0110\u1ed9 tr\u1ec5 n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb h\u1ecfng trong qu\u00e1 tr\u00ecnh t\u0103ng t\u1ed1c ho\u1eb7c gi\u1ea3m t\u1ed1c \u0111\u1ed9t ng\u1ed9t. C\u00e1c thi\u1ebft k\u1ebf hi\u1ec7n \u0111\u1ea1i t\u1eadp trung v\u00e0o c\u00e1c l\u1edbp d\u00e0y c\u00f3 "\u0111\u1ed9 x\u1ed1p cao". C\u00e1c l\u1edbp n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef cao trong khi v\u1eabn duy tr\u00ec c\u00e1c k\u00eanh m\u1edf cho s\u1ef1 di chuy\u1ec3n c\u1ee7a kh\u00ed.<\/p>\n\n\n\n

H\u01a1n n\u1eefa, t\u00ednh \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u1eabn l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng quan ng\u1ea1i.\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>\u00a0Ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao. C\u00e1c l\u1edbp ph\u1ee7 d\u00e0y th\u01b0\u1eddng ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ed1c nhi\u1ec7t t\u1ed1t h\u01a1n c\u00e1c l\u1edbp m\u1ecfng. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t l\u1edbp \u0111\u1ec7m nhi\u1ec7t cho ch\u1ea5t n\u1ec1n g\u1ed1m. Tuy nhi\u00ean, n\u1ebfu l\u1edbp ph\u1ee7 qu\u00e1 d\u00e0y, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u1ed1c \u0111\u1ed9 gi\u00e3n n\u1edf gi\u1eefa g\u1ed1m v\u00e0 l\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng "bong tr\u00f3c". \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c ch\u1ea5t x\u00fac t\u00e1c b\u1ecb bong ra kh\u1ecfi ch\u1ea5t n\u1ec1n, g\u00e2y ra h\u1ecfng h\u00f3c ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7<\/h2>\n\n\n\n

Ph\u01b0\u01a1ng ph\u00e1p ph\u1ee7 ch\u1ea5t x\u00fac t\u00e1c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 cu\u1ed1i c\u00f9ng. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng s\u1eed d\u1ee5ng quy tr\u00ecnh nh\u00fang dung d\u1ecbch ho\u1eb7c in phun ch\u00ednh x\u00e1c. T\u0103ng s\u1ed1 chu k\u1ef3 ph\u1ee7 cho ph\u00e9p ki\u1ec3m so\u00e1t \u0111\u1ed9 d\u00e0y ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n\n\n\n

M\u1ed7i l\u1edbp b\u1ed5 sung l\u00e0m t\u0103ng \u0111i\u1ec7n th\u1ebf khu\u1ebfch t\u00e1n qu\u00e1 m\u1ee9c. C\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 ch\u1ea5t x\u00fac t\u00e1c in phun cho th\u1ea5y m\u1ed1i t\u01b0\u01a1ng quan tr\u1ef1c ti\u1ebfp gi\u1eefa s\u1ed1 l\u1edbp v\u00e0 kh\u1ea3 n\u0103ng khu\u1ebfch t\u00e1n kh\u00ed gi\u1ea3m. C\u00e1c k\u1ef9 thu\u1eadt \u1ee9ng d\u1ee5ng ti\u00ean ti\u1ebfn nh\u1eb1m m\u1ee5c \u0111\u00edch t\u1ea1o ra m\u1ed9t gradient. Trong thi\u1ebft k\u1ebf gradient, l\u1edbp ngo\u00e0i c\u00f3 \u0111\u1ed9 x\u1ed1p cao \u0111\u1ec3 kh\u00ed d\u1ec5 d\u00e0ng x\u00e2m nh\u1eadp. L\u1edbp trong ch\u1ee9a n\u1ed3ng \u0111\u1ed9 cao c\u00e1c kim lo\u1ea1i ho\u1ea1t t\u00ednh \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ph\u1ea3n \u1ee9ng l\u00e0m s\u1ea1ch s\u00e2u.<\/p>\n\n\n\n

Th\u1ec3 ch\u1ee7 \u0111\u1ed9ng l\u00e0m r\u00f5 vai tr\u00f2 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ed1i \u01b0u h\u00f3a \u201c\u0111\u1ed9 nh\u1edbt c\u1ee7a h\u1ed7n h\u1ee3p\u201d \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ph\u00e2n b\u1ed1 \u0111\u1ec1u. H\u1ecd gi\u00e1m s\u00e1t qu\u00e1 tr\u00ecnh s\u1ea5y kh\u00f4 \u0111\u1ec3 ng\u0103n ng\u1eeba n\u1ee9t l\u1edbp ph\u1ee7. H\u1ecd ki\u1ec3m tra \u0111\u1ed9 b\u00e1m d\u00ednh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i trong \u0111i\u1ec1u ki\u1ec7n l\u00e1i xe th\u1ef1c t\u1ebf.<\/p>\n\n\n\n

C\u00e1c c\u01a1 ch\u1ebf suy tho\u00e1i trong b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/h2>\n\n\n\n

M\u1ecdi\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong>\u00a0<\/a>N\u00f3 b\u1ecb ph\u00e2n h\u1ee7y theo th\u1eddi gian. Nhi\u1ec7t \u0111\u1ed9 cao khi\u1ebfn c\u00e1c h\u1ea1t nano kim lo\u1ea1i qu\u00fd b\u1ecb "k\u1ebft d\u00ednh". Qu\u00e1 tr\u00ecnh k\u1ebft d\u00ednh x\u1ea3y ra khi c\u00e1c h\u1ea1t kim lo\u1ea1i nh\u1ecf h\u1ee3p nh\u1ea5t th\u00e0nh c\u00e1c h\u1ea1t l\u1edbn h\u01a1n. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u00f3 s\u1eb5n cho c\u00e1c ph\u1ea3n \u1ee9ng.<\/p>\n\n\n\n

\u0110\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 \u0111\u00f3ng vai tr\u00f2 b\u1ea3o v\u1ec7 \u1edf \u0111\u00e2y. L\u1edbp ph\u1ee7 d\u00e0y h\u01a1n cung c\u1ea5p nhi\u1ec1u "kh\u00f4ng gian" h\u01a1n cho ch\u1ea5t x\u00fac t\u00e1c l\u00e3o h\u00f3a m\u1ed9t c\u00e1ch \u1ed5n \u0111\u1ecbnh. Ngay c\u1ea3 khi c\u00e1c v\u1ecb tr\u00ed b\u00ean ngo\u00e0i b\u1ecb thi\u00eau k\u1ebft, c\u00e1c v\u1ecb tr\u00ed b\u00ean trong v\u1eabn ho\u1ea1t \u0111\u1ed9ng. Tuy nhi\u00ean, s\u1ef1 nhi\u1ec5m \u0111\u1ed9c h\u00f3a h\u1ecdc c\u0169ng x\u1ea3y ra. C\u00e1c ch\u1ea5t nh\u01b0 ph\u1ed1t pho ho\u1eb7c l\u01b0u hu\u1ef3nh t\u1eeb d\u1ea7u \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 ph\u1ee7 l\u00ean ch\u1ea5t x\u00fac t\u00e1c.<\/p>\n\n\n\n

Trong m\u1ed9t l\u1edbp m\u1ecfng, m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf ch\u1ea5t \u0111\u1ed9c c\u00f3 th\u1ec3 l\u00e0m v\u00f4 hi\u1ec7u h\u00f3a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. M\u1ed9t l\u1edbp d\u00e0y h\u01a1n t\u1ea1o ra m\u1ed9t v\u00f9ng "hy sinh". C\u00e1c ch\u1ea5t \u0111\u1ed9c th\u01b0\u1eddng n\u1eb1m g\u1ea7n b\u1ec1 m\u1eb7t l\u1edbp ph\u1ee7. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea3o v\u1ec7 c\u00e1c v\u1ecb tr\u00ed x\u00fac t\u00e1c s\u00e2u h\u01a1n v\u00e0 gi\u1eef cho ch\u00fang ho\u1ea1t \u0111\u1ed9ng. Do \u0111\u00f3, c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n th\u01b0\u1eddng th\u00fac \u0111\u1ea9y c\u00e1c k\u1ef9 s\u01b0 h\u01b0\u1edbng t\u1edbi l\u1edbp ph\u1ee7 d\u00e0y h\u01a1n trong ph\u1ea1m vi t\u1ed1i \u01b0u 2\u20134 \u03bcm.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch hi\u1ec7u n\u0103ng: Logic c\u1ef1c d\u01b0\u01a1ng so v\u1edbi c\u1ef1c \u00e2m trong x\u00fac t\u00e1c<\/h2>\n\n\n\n

M\u1eb7c d\u00f9 v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c cung c\u1ea5p th\u1ea3o lu\u1eadn v\u1ec1 pin nhi\u00ean li\u1ec7u, nh\u01b0ng logic t\u01b0\u01a1ng t\u1ef1 c\u0169ng \u00e1p d\u1ee5ng cho...\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>Ch\u00fang ta c\u00f3 th\u1ec3 xem v\u00f9ng oxy h\u00f3a v\u00e0 v\u00f9ng kh\u1eed c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i nh\u01b0 hai v\u00f9ng ch\u1ee9c n\u0103ng \u0111\u1ed1i l\u1eadp.<\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh kh\u1eed NOx (oxit nit\u01a1) th\u01b0\u1eddng c\u1ea7n c\u00e1c v\u1ecb tr\u00ed x\u00fac t\u00e1c \u0111\u1eb7c hi\u1ec7u d\u1ef1a tr\u00ean Rhodium. C\u00e1c ph\u1ea3n \u1ee9ng n\u00e0y th\u01b0\u1eddng di\u1ec5n ra ch\u1eadm h\u01a1n v\u00e0 nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi nhi\u1ec7t \u0111\u1ed9. Qu\u00e1 tr\u00ecnh oxy h\u00f3a CO (monoxit cacbon) v\u00e0 HC (hydrocacbon) d\u1ef1a v\u00e0o Platinum ho\u1eb7c Palladium.<\/p>\n\n\n\n

C\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng x\u1ebfp l\u1edbp c\u00e1c kim lo\u1ea1i n\u00e0y. H\u1ecd c\u00f3 th\u1ec3 \u0111\u1eb7t Rhodium \u1edf l\u1edbp tr\u00ean c\u00f9ng m\u1ecfng h\u01a1n, d\u1ec5 ti\u1ebfp c\u1eadn h\u01a1n. H\u1ecd c\u00f3 th\u1ec3 \u0111\u1eb7t Palladium \u1edf l\u1edbp n\u1ec1n d\u00e0y h\u01a1n. C\u00e1ch ti\u1ebfp c\u1eadn "ph\u00e2n v\u00f9ng" ho\u1eb7c "x\u1ebfp l\u1edbp" n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed7i ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc di\u1ec5n ra trong \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng ri\u00eang c\u1ee7a n\u00f3. B\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 d\u00e0y \u1edf m\u1ed7i l\u1edbp,\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/a><\/strong>\u00a0\u0110\u1ea1t hi\u1ec7u su\u1ea5t g\u1ea7n nh\u01b0 ho\u00e0n h\u1ea3o tr\u00ean ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 kh\u00ed th\u1ea3i r\u1ed9ng.<\/p>\n\n\n\n

Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n\n\n\n

T\u1ed1i \u01b0u h\u00f3a\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong>\u00a0<\/a>Vi\u1ec7c n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 c\u00e2n b\u1eb1ng tinh t\u1ebf gi\u1eefa c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc. \u0110\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 \u0111\u00f3ng vai tr\u00f2 l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a \u0111i\u1ec1u n\u00e0y. \u0110\u1ed9 d\u00e0y t\u1eeb 2 \u0111\u1ebfn 4 \u03bcm th\u01b0\u1eddng cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng trong ng\u00e0nh \u00f4 t\u00f4. N\u00f3 t\u1ed1i \u0111a h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c kim lo\u1ea1i qu\u00fd \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u s\u1ee9c c\u1ea3n truy\u1ec1n kh\u1ed1i.<\/p>\n\n\n\n

Ch\u00fang ta \u0111\u00e3 th\u1ea5y r\u1eb1ng c\u00e1c l\u1edbp ph\u1ee7 qu\u00e1 d\u00e0y d\u1eabn \u0111\u1ebfn \u00e1p su\u1ea5t ng\u01b0\u1ee3c cao v\u00e0 kh\u1ea3 n\u0103ng khu\u1ebfch t\u00e1n kh\u00ed k\u00e9m. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c l\u1edbp ph\u1ee7 si\u00eau m\u1ecfng l\u1ea1i kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n c\u1ea7n thi\u1ebft cho tu\u1ed5i th\u1ecd 100.000 d\u1eb7m c\u1ee7a m\u1ed9t chi\u1ebfc xe hi\u1ec7n \u0111\u1ea1i. \u201cRanh gi\u1edbi ba pha\u201d v\u1eabn l\u00e0 tr\u1ecdng t\u00e2m ch\u00ednh cho c\u00e1c nghi\u00ean c\u1ee9u trong t\u01b0\u01a1ng lai. B\u1eb1ng c\u00e1ch c\u1ea3i thi\u1ec7n \u0111\u1ed9 x\u1ed1p c\u1ee7a l\u1edbp ph\u1ee7 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c khi thi c\u00f4ng, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c gi\u1ea3m l\u01b0\u1ee3ng kh\u00ed th\u1ea3i.\u00a0b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u<\/strong><\/a>\u00a0\u0110\u00e2y s\u1ebd v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a vi\u1ec7c b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng trong ng\u00e0nh \u00f4 t\u00f4 trong nhi\u1ec1u n\u0103m t\u1edbi.<\/p>","protected":false},"excerpt":{"rendered":"

Kh\u00e1m ph\u00e1 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t b\u1ed9 chuy\u1ec3n \u0111\u1ed5i x\u00fac t\u00e1c ba chi\u1ec1u. Ch\u00fang t\u00f4i ph\u00e2n t\u00edch l\u00fd do t\u1ea1i sao \u0111\u1ed9 d\u00e0y 2\u20134 \u03bcm t\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 b\u1ec1n v\u00e0 s\u1ef1 khu\u1ebfch t\u00e1n kh\u00ed. <\/p>","protected":false},"author":1,"featured_media":6418,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowgdPcCw:productID":"","footnotes":""},"categories":[98],"tags":[1629,1665,1662,99,1663,1618],"class_list":["post-6417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","tag-automotive-emission-control-2","tag-catalyst-coating-thickness","tag-precious-metal-utilization","tag-three-way-catalytic-converter-2","tag-twc-mass-transfer","tag-washcoat-efficiency"],"_links":{"self":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts\/6417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/comments?post=6417"}],"version-history":[{"count":1,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts\/6417\/revisions"}],"predecessor-version":[{"id":6419,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/posts\/6417\/revisions\/6419"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/media\/6418"}],"wp:attachment":[{"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/media?parent=6417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/categories?post=6417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/3waycatalyst.com\/vi\/wp-json\/wp\/v2\/tags?post=6417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}