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[求助]
重复浸渍法中干燥煅烧一次还是多次? 已有1人参与
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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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2楼2018-10-31 13:02:53
wangshihua
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3楼2018-11-02 14:50:16
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