Medium-temperature hydrophobic decarburization adsorbent and preparation method thereof
An adsorbent and medium-temperature technology, applied in the field of clean energy, can solve problems such as high temperature of mixed gas and decreased decarbonization ability
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[0043] The invention provides a method for preparing a medium-temperature hydrophobic decarburization adsorbent, comprising the following steps:
[0044] a) Mix carbon source, nitrogen source and organic solvent and dry to obtain a primary precursor;
[0045] b) carbonizing the primary precursor to obtain a carbonized product;
[0046] c) mixing the carbonized product with zinc chloride and an organic solvent and then drying to obtain a secondary precursor;
[0047] d) thermally activating the secondary precursor to obtain a medium-temperature hydrophobic decarburization adsorbent;
[0048] The carbon source is anthracite and medium temperature coal tar pitch.
[0049] Regarding step a): mixing carbon source, nitrogen source and organic solvent and then drying to obtain a primary precursor.
[0050] In the present invention, the carbon source is anthracite and medium temperature coal tar pitch.
[0051]The anthracite is a coal raw material with the most balanced distributi...
Embodiment 1
[0081] Embodiment 1: preparation U 15 A 9 C 1 Z 10 -700 nitrogen doped hydrophobic activated carbon
[0082] S1. Preparation of primary precursor
[0083] Weigh 10 parts of CTP and dissolve in 200 parts of tetrahydrofuran-ethanol mixed solvent (the volume fraction of tetrahydrofuran in the mixed solvent is 25%), then weigh 180 parts of urea and dissolve in the above solvent. After that, weigh 90 parts of anthracite, disperse it in the above system, heat it in a constant temperature water bath to 65°C, stir and mix at a speed of 150 rpm, and volatilize the solvent at the same time. Transfer to an alumina quartz boat, and air-dry at 70°C for 5 hours to obtain a primary precursor, denoted as [A] 9 [C] 1 [U] 15 .
[0084] Among them, the carbon content of anthracite is recorded as 90%, and the carbon content of CTP is recorded as 75%. The nitrogen content of urea is recorded as 52%. It is required that the carbon-nitrogen ratio in the precursor reaches 10:15, so 100 part...
Embodiment 2
[0091] Example 2: Preparation of M 15 A 9 C 1 Z 10 -700 nitrogen doped hydrophobic activated carbon
[0092] 1. Sample preparation:
[0093] S1. Preparation of primary precursor
[0094] Weigh 10 parts of CTP and dissolve in 200 parts of tetrahydrofuran-ethanol mixed solvent (the volume fraction of tetrahydrofuran in the mixed solvent is 25%), then weigh 150 parts of melamine, and add melamine into the dispersion system at a rate of 6 parts / min. until a non-settling emulsion dispersion is formed. Heat the dispersion system in a constant temperature water bath to 65°C, stir and mix at a speed of 150 rpm, and at the same time volatilize the solvent. When it becomes a viscous paste, transfer it to an alumina quartz boat, and air-dry it at 100°C for 5 hours to obtain a Grade precursor, denoted as [A] 9 [C] 1 [M] 15 .
[0095] S2, carbonization treatment
[0096] The resulting primary precursor [A] 9 [C] 1 [M] 15 Placed in a tube furnace, fed high-purity nitrogen with...
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