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furien

金虫 (小有名气)

[交流] 【求助】incipient wetness impregnation method是什么方法? 已有2人参与

incipient wetness impregnation method是什么方法?我只知道叫初湿含浸法,是催化剂载体空体积和催化剂本身体积相等时进行浸渍法制备催化剂的方法?有没有人能具体举个例子?什么叫等体积
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wwqsjxp

铁杆木虫 (正式写手)

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催化大师(金币+2):谢谢指点,欢迎常来催化版讨论! 2010-07-06 10:33:15
Incipient wetness impregnation (IW or IWI) is a commonly used technique for the synthesis of heterogeneous catalysts. Typically, the active metal precursor is dissolved in an aqueous or organic solution. Then the metal-containing solution is added to a catalyst support containing the same pore volume as the volume of solution that was added. Capillary action draws the solution into the pores. The catalyst can then be dried and calcined to drive off the volatile components within the solution, depositing the metal on the catalyst surface.The maximum loading is limited by the solubility of the precursor in the solution. the concentration profile of the impregnated compound depends in the mass transfer conditions within the pores during impregnation and drying.
2楼2010-07-05 20:20:19
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ruiguoff

金虫 (正式写手)


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等体积,就是活性组分前驱体溶液的体积等于载体的孔体积,楼上说的很到位
3楼2010-07-06 08:50:01
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