Application of a carbon fiber core-shell catalyst in catalytic hydrolysis of carbonyl sulfide and methyl mercaptan in CO-rich tail gas
A technology of core-shell catalyst and catalytic hydrolysis, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problems that need to be further improved, and save the preparation time , high output and short preparation time
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[0038] The present invention provides a method for preparing a carbon fiber core-shell catalyst described in the above scheme, comprising the following steps: dissolving a high molecular polymer in a dimethylformamide solution to obtain a core solution; the high molecular polymer is polyacrylonitrile or Polyvinyl alcohol; The molecular weight of the high molecular polymer is 80,000~250,000;
[0039] The metal salt is dissolved in water to obtain a shell solution; the metal salt is iron nitrate, iron sulfate, copper nitrate, copper sulfate, aluminum nitrate, aluminum sulfate, zinc nitrate, zinc sulfate, nickel nitrate, cobalt nitrate, manganese nitrate, nitric acid One or more of lanthanum, cerium nitrate, praseodymium nitrate and neodymium nitrate;
[0040] injecting the core solution into the inner layer of the coaxial needle, injecting the shell solution into the outer layer of the coaxial needle, and performing coaxial electrospinning to obtain a catalyst precursor with a c...
Embodiment 1
[0070] Mix polyacrylonitrile (PAN) powder with a polymer molecular weight of 150,000 and dimethylformamide solution (DMF), and stir at 60°C for 12 h to obtain a nuclear solution (concentration of 10wt.%); the preparation concentration is 10wt .% copper nitrate solution to obtain a shell solution; the core solution is injected into the inner layer of the coaxial needle, and the shell solution is injected into the outer layer of the coaxial needle, and the electrospinning equipment roll receiver is used, and the roll speed is 1000 rpm. The copper foil is covered on the receiver, the distance from the receiver needle to the receiver is 15 cm, the needle is connected to the positive pole, the receiver is connected to the negative pole, the voltage is 18 kV (15 kV for the positive pole, -3 kV for the negative pole), and the advancing speed of the outer layer solution is 2.0 mL / h, the advancing speed of the inner layer solution is 1.0 mL / h, and a catalyst precursor with a core-shell...
Embodiment 2
[0073] Mix polyacrylonitrile (PAN) powder with a polymer molecular weight of 150,000 and dimethylformamide solution (DMF), and stir at 60°C for 12 h to obtain a nuclear solution (concentration of 10wt.%); the preparation concentration is 10wt .% metal salt solution (the mass ratio of copper nitrate and ferric nitrate is 5:1), obtain shell solution; The core solution is injected into the inner layer of the coaxial needle, and the shell solution is injected into the outer layer of the coaxial needle, using electrostatic Spinning equipment roller receiver, the roller speed is 1000 rpm, copper foil is covered on the receiver, the distance from the receiver needle to the receiver is 15 cm, the needle is connected to the positive pole, the receiver is connected to the negative pole, the voltage is 18 kV (the positive pole is 15 kV , negative electrode-3 kV), the outer layer solution advancing speed is 2.0 mL / h, and the inner layer solution advancing speed is 1.0 mL / h, under the above...
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