- 专利标题： METHANE COMBUSTION CATALYST, METHOD FOR PRODUCING THE SAME AND METHOD FOR PURIFYING COMBUSTION EXHAUST GAS
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申请号： US17923205申请日： 2021-05-06
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公开(公告)号： US20230173464A1公开(公告)日： 2023-06-08
- 发明人: Kazutaka TAKEDA , Syunsuke KATO , Shunji KIKUHARA , Kanako KURAHASHI , Tatsushi MINAMI , Masahiro SHIRAKI
- 申请人： TANAKA KIKINZOKU KOGYO K.K.
- 申请人地址： JP Tokyo
- 专利权人： TANAKA KIKINZOKU KOGYO K.K.
- 当前专利权人： TANAKA KIKINZOKU KOGYO K.K.
- 当前专利权人地址： JP Tokyo
- 优先权： JP 20086355 2020.05.15
- 国际申请： PCT/JP2021/017317 2021.05.06
- 进入国家日期： 2022-11-03
- 主分类号： B01J23/46
- IPC分类号： B01J23/46 ; B01J23/42 ; B01J23/14 ; B01J37/02 ; B01J37/08 ; B01D53/86
摘要：
The present invention relates to a methane combustion catalyst including platinum and iridium supported on a tin oxide carrier for combusting methane in a combustion exhaust gas containing sulfur oxide. In the methane combustion catalyst, a ratio RTO of platinum oxides to metal platinum is 8.00 or more, wherein the ratio RTO is based on existence percentages of the metal platinum (Pt) and the platinum oxides (PtO and PtO2) obtained from a platinum 4f spectrum analyzed and measured by X-ray photoelectron spectroscopy (XPS) and calculated in accordance with the following expression. In the following expression, RPt is an existence percentage of the metal platinum (Pt), RPto is an existence percentage of PtO, and RPto2 is an existence percentage of PtO2.
RTO=(RPtO+RPtO2)/RPt [Expression 1]
RTO=(RPtO+RPtO2)/RPt [Expression 1]
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