Tianjin Research Institute for Water Transport Engineering, M.o.t.

Yanjie Wei

Zhipeng Zhang

Bin Liu

Wei Ye

Huaqing Zhang

Zhonghua Tian

Boqun Liu

Fang Lin

Mingqi Wang

Yingjie Zhao

Siqi Chen

Junjie Zhao

Yidan Huang

Haiying Liu

Xiaoxiang Feng

Feifei Qin

Mingyu Guo

Shaoping Cui

Juntao Li

Baishun Sun

Shipei Dong

The present invention relates to the technical field of catalyst preparation, disclosing a preparation method and application of a coated vanadium-tungsten-titanium oxide monolithic SCR catalyst. The method includes the steps of mixing a vanadium oxide precursor, a tungsten oxide precursor, titanium dioxide, an inorganic adhesive, an organic adhesive and a macromolecular surfactant with deionized water and stirring them to obtain a thick liquid; adding a pH adjuster to the thick liquid to make its pH 1.5-4.5; impregnating a cordierite honeycomb carrier in the thick liquid to obtain a preliminarily-impregnated catalyst and dried and calcined the preliminarily-impregnated catalyst to obtain a finished catalyst. The method has advantages such as simple operation, easy repetition and short time-consuming, so it can be applied to exhaust gas post-treatment of a marine diesel engine, and provide a good choice for catalysts used to denitrify medium and high temperature exhausted gas from marine engines.

Preparation method and application of coated vanadium-tungsten-titanium oxide monolithic SCR catalyst

Disclosed in the present invention is a fishway effect evaluation method based on stable isotope method, belonging to the technical field of fishway effect evaluation. The fishway effect evaluation method according to the present invention comprises stable isotope ratio determination, trophic niche estimation and effectiveness evaluation on fishway construction. The evaluation method according to the present invention is used for researching one or more migratory fishes in the upstream and downstream of the water conservancy projects, determining and quantitatively explaining whether the influence of the water conservancy projects on one or more migratory fishes is eliminated or not from the perspective of the ecosystem through comparison and analysis of stable isotopes, and has the characteristics of high detection speed, stable result and the like.

Fishway effect evaluation method based on stable isotope method

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Tianjin, China

Yanjie Wei