Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application of catalyst
A low-carbon olefin and catalyst technology, applied in the field of synthesis gas to low-carbon olefin catalyst, can solve the problems of low activity and selectivity at low temperature, and achieve the effects of promoting dispersion, strengthening adsorption activation, and avoiding carbon deposition
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Embodiment 1
[0035] Dissolve 118.27 grams of ferric nitrate, 0.17 grams of potassium nitrate and 12.25 grams of copper nitrate in 100 milliliters of water to form solution Ⅰ of a certain concentration, dissolve 47.7 grams of ammonium heptamolybdate in 100 milliliters of water to obtain solution Ⅱ, and add solution Ⅱ to solution Ⅰ To obtain mixture I, add 120 grams of aluminum sol with an alumina content of 25% by weight to mixture I and adjust the pH value to 8 with ammonia water to obtain mixture II, heat and concentrate mixture II in a boiling water bath to a solid content of 55% by weight to obtain a slurry material, the slurry was dried at 80°C with hot air with a relative humidity of 90% for 12 hours to obtain a catalyst precursor, and the catalyst precursor was roasted at 750°C for 3 hours to obtain a catalyst, the composition of which was: 70% Fe 100 Mo 80 Cu 8 K 0.5 Ox+30%Al 2 o 3 . The catalyst is pulverized and screened with 20-40 mesh particles for use.
[0036]
Embodiment 2
[0038] Take 118.3 grams of ferric nitrate, 17.1 grams of zinc nitrate solution, 9.83 grams of nickel nitrate and 1.03 grams of potassium nitrate dissolved in 100 ml of water to make a certain concentration of solution I, 52.6 grams of chromium nitrate and 0.15 grams of ammonium tellurate dissolved in 100 ml of water To obtain solution II, add solution II to solution I to obtain mixture I, add 125 grams of silica sol with a mass content of silicon oxide of 40% to mixture I and adjust the pH value to 9 with ammonia water to obtain mixture II, and place mixture II in a boiling water bath Heat and concentrate to a solid content of 55% by weight to obtain a slurry, dry the slurry at 90° C. with hot air with a relative humidity of 90% for 5 hours to obtain a catalyst precursor, and roast the catalyst precursor at 650° C. for 5 hours to obtain a catalyst. Composition: 50%Fe 100 Ni 10 Cr 45 Zn 17 K 3 Te 0.2 Ox+50%SiO2 2 . The catalyst is pulverized and screened with 20-40 mesh ...
Embodiment 3
[0041] Get 54.2 grams of ferric nitrate, 0.17 grams of potassium nitrate and 5.61 grams of copper nitrate dissolved in 100 milliliters of water to make a certain concentration of solution I, 0.17 grams of ammonium selenate and 19 grams of ammonium heptamolybdate were dissolved in 100 milliliters of water to obtain solution II, Add solution II to solution I to obtain mixture I, add 49.3 grams of silica sol with a mass content of silicon oxide of 40% and 201.1 grams of aluminum sol with a mass content of alumina of 25% to mixture I and adjust the pH value to 8 with ammonia water to obtain mixture II , the mixture II was placed in a boiling water bath, heated and concentrated to a solid content of 55% by weight to obtain a slurry, and the slurry was dried at 80° C. with hot air with a relative humidity of 90% for 24 hours to obtain a catalyst precursor. The catalyst precursor was heated at 750 The catalyst was prepared by roasting at ℃ for 8 hours, and its composition was: 30% Fe ...
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