发明授权
- 专利标题： Method and apparatus for determining ammonia concentration of gas
- 专利标题（中）： 测定气体氨浓度的方法和装置
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申请号： US631198申请日： 1975-11-12
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公开(公告)号： US3977836A公开(公告)日： 1976-08-31
- 发明人: Shimpei Matsuda , Fumito Nakajima , Masato Takeuchi , Shigeo Uno , Akira Kato , Makoto Imanari , Yoshihisa Watanabe
- 申请人： Shimpei Matsuda , Fumito Nakajima , Masato Takeuchi , Shigeo Uno , Akira Kato , Makoto Imanari , Yoshihisa Watanabe
- 申请人地址： JA ALL OF JA ALL OF JA all of
- 专利权人： Hitachi, Ltd.,Mitsubishi Petrochemical Company Limited,Babcock-Hitachi K.K.
- 当前专利权人： Hitachi, Ltd.,Mitsubishi Petrochemical Company Limited,Babcock-Hitachi K.K.
- 当前专利权人地址： JA ALL OF JA ALL OF JA all of
- 优先权： JA49-129943 19741113
- 主分类号： G01N31/00
- IPC分类号： G01N31/00 ; G01N33/00 ; G01N25/22 ; G01N21/12 ; G01N21/58
摘要：
An ammonia gas to be determined, and an oxidative gas containing nitrogen oxides in moles more than those of the ammonia are brought into contact with an analytical catalyst capable of forming nitrogen and water from ammonia and nitrogen oxides.Concentrations of nitrogen oxides of the gas before and after the contact with the analytical catalyst are determined, and an ammonia concentration of the gas is determined by converting the difference between the concentrations of nitrogen oxides to the ammonia concentration by calculation.
公开/授权文献
- US5768326A PLL circuit and method 公开/授权日：1998-06-16
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