A high-efficiency methane carbon dioxide reforming ni/sio 2 Catalyst and preparation method thereof by electrospinning
A carbon dioxide and catalyst technology, applied in the field of high-efficiency catalysts, can solve the problems of electrospinning technology that has not been widely reported, and achieve the effects of simple operation, good stability and good anti-carbon deposition performance
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Embodiment 1
[0023] 1. Weigh 4.7g tetraethyl orthosilicate (TEOS) and 1.1g polyvinylpyrrolidone (PVP) and 1.13g nickel nitrate respectively, then dissolve TEOS in 0.95g dilute hydrochloric acid (substance concentration 0.080mol / L) and 1.25g In ethanol, PVP was dissolved in 4.12g N, N-dimethylformamide (DMF) and 2.50g dimethyl sulfoxide (DMSO), and nickel nitrate was dissolved in 1.82g ethanol; after complete dissolution, the three The two solutions were placed on a magnetic stirrer and stirred at a constant speed for 9 hours, and finally the three solutions were fully mixed and placed on a magnetic stirrer to stir for 0.5 hours to obtain a spinning precursor. Operations were performed at 25°C.
[0024] 2. Put the mixed liquid obtained in 1 into the syringe, then put the syringe into the push device, and stick a layer of metal foil on the receiver, and the rotation speed is 80r / min. The voltage was adjusted to 12kV, the spinning liquid feeding rate was 1ml / h, and the spinning was started. ...
Embodiment 2
[0028] 1. Nickel nitrate was dissolved in 1.82g of water; others were consistent with step 1 in Example 1.
[0029] 2. Same as Step 2 of Example 1.
[0030]3. Same as Step 3 of Example 1.
[0031] 4. Take 0.1g of the sample obtained in step 3 and place it in a quartz tube. After reduction at 600°C, react with methane, carbon dioxide and argon at a flow ratio of 1:1:2 at a temperature of 700°C. The catalyst evaluation results are shown in the table 1. CH 4 , CO 2 The highest conversion rates were 64.97%, 78.23%; H 2 The highest selectivities of , CO are 89.98%, 96.28%, respectively.
Embodiment 3
[0033] 1. TEOS was dissolved in 0.85g dilute nitric acid (substance concentration 0.080mol / L) and 1.25g ethanol; others were consistent with step 1 in Example 1.
[0034] 2. Same as Step 2 of Example 1.
[0035] 3. Same as Step 3 of Example 1.
[0036] 4. Take 0.1g of the sample obtained in step 3 and place it in a quartz tube. After reduction at 600°C, react with methane, carbon dioxide and argon at a flow ratio of 1:1:2 at a temperature of 700°C. The catalyst evaluation results are shown in the table 1. CH 4 , CO 2 The highest conversion rates were 60.56%, 75.37%; H 2 The highest selectivities of , CO are 87.32%, 95.42%, respectively.
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