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tt陶80

新虫 (初入文坛)

[求助] 重复浸渍法中干燥煅烧一次还是多次?已有1人参与

The procedures for each impregnation were as follows. First, the precursor solution was prepared by dissolving a desired amount of Ni(NO3)2•6H2O or Co(NO3)2•6H2O in deionized water just sufficient to fill the pores of 3.0 g of SiO2 support. The precursor solution then was added to the support dropwise and treated with ultrasound for 1 h to facilitate metal dispersion. After aging in air at ambient temperature overnight, the catalyst was dried in air at 80 °C for 10 h and calcined at 450 °C for 3 h. The catalyst obtained after four times of impregnation was stored in vials and reduced under H2 flow with a flow rate of 60 mL/min at 450 °C for 3 h prior to catalytic evaluation.
文献里面重复浸渍四次,过程中的干燥和煅烧是重复四次,还是浸渍四次后干燥、煅烧一次。
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一如,,既往

新虫 (初入文坛)

你好,我也遇到同样的问题,想问你最后是怎么做的

发自小木虫Android客户端
2楼2018-10-31 13:02:53
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wangshihua

金虫 (正式写手)

小硕硕

【答案】应助回帖

虽然文献啥意思不知道,但是在做催化剂的过程中,如果采用多次浸渍的方法,不建议多次焙烧,多次被烧容易引起金属组分团聚,致使其分散不均。
抉择决定命运
3楼2018-11-02 14:50:16
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