Lignin carbon nano-microsphere palladium-loaded catalyst and preparation method and application thereof
A technology of nano-microspheres and lignin carbon, which is applied in the direction of catalyst activation/preparation, cyanide reaction preparation, chemical instruments and methods, etc. It can solve the problem of low catalytic performance of carbon-palladium catalysts, difficulty in maintaining microscopic morphology, poor dispersion performance, etc. problems, to achieve the effect of low preparation cost, good practical application value and good dispersion performance
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Embodiment 1
[0032] (1) Weighing commercial lignin, using N,N-dimethylformamide as a solvent, configured as a lignin electrostatic spray solution with a lignin mass fraction of 35%;
[0033] (2) the lignin electrostatic spraying solution of step (1) is transferred in the equipment of electrostatic spraying, is 25kv at static voltage, and receiving distance is 15cm, carries out electrostatic spraying under the condition that the propulsion speed of electrostatic spraying solution is 3ml / h, Obtain lignin nano-microspheres;
[0034] (3) The obtained lignin nanospheres are placed in a tube furnace, and the lignin nanospheres are preoxidized at a preoxidation temperature of 280° C. The preoxidation is carried out in air, and the heating rate is 0.2° C. / min, the pre-oxidation time is 2h;
[0035] (4) Carbonize the above-mentioned pre-oxidized lignin nano-microspheres, the carbonization temperature is 800°C, carbonization is carried out in nitrogen, the heating rate is 2°C / min, and the carboniz...
Embodiment 2
[0039] (1) Weigh commercial lignin, use N,N-dimethylformamide as a solvent, and configure it as a lignin electrostatic spray solution with a lignin mass fraction of 45%;
[0040] (2) the lignin electrostatic spraying solution of step (1) is transferred in the equipment of electrostatic spraying, is 15kv at static voltage, and receiving distance is 15cm, carries out electrostatic spraying under the condition that the propulsion speed of electrostatic spraying solution is 3ml / h, Obtain lignin electrostatically sprayed nano microspheres;
[0041] (3) Place the obtained lignin electrostatically sprayed nano-microspheres in a tube furnace, and pre-oxidize the lignin nano-microspheres at a pre-oxidation temperature of 260 ° C. The pre-oxidation is carried out in air, and the heating rate is 0.5°C / min, pre-oxidation time is 2h;
[0042] (4) Carbonize the above-mentioned pre-oxidized lignin nano-microspheres, the carbonization temperature is 400°C, the carbonization is carried out in...
Embodiment 3
[0046] (1) Weigh commercial lignin, use N,N-dimethylformamide as a solvent, and configure it as a lignin electrostatic spray solution with a lignin mass fraction of 35%;
[0047] (2) the lignin electrostatic spraying solution of step (1) is transferred in the equipment of electrostatic spraying, is 15kv at static voltage, and receiving distance is 10cm, carries out electrostatic spraying under the condition that the propulsion speed of electrostatic spraying solution is 2ml / h, Obtain lignin electrostatically sprayed nano microspheres;
[0048] (3) The obtained lignin electrostatically sprayed nano-microspheres are placed in a tube furnace, and the lignin nano-microspheres are pre-oxidized at a pre-oxidation temperature of 280 ° C. The pre-oxidation is carried out in air, and the heating rate is 0.2 ℃ / min, pre-oxidation time is 2h;
[0049](4) Carbonize the above-mentioned pre-oxidized lignin electrostatically sprayed nano microspheres, the carbonization temperature is 800 ° C...
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Abstract
Description
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Application Information
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