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Selective hydrogenation catalyst for producing aviation kerosene and preparation method and application thereof

A hydrogenation catalyst and selective technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost, unfavorable cracking reaction, poor economy, etc., to reduce agglomeration, reduce cost effect

Inactive Publication Date: 2016-09-21
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the jet fuel selectivity of the catalyst is high, which can reach more than 80%, the modification process of SAPO-11 is complicated and the cost is high, and the acidity of the SAPO-11 carrier is weak, which is not conducive to the cracking reaction.
[0005] Since the graphene material is basically non-acidic, it is not conducive to the cracking reaction, and the preparation cost of single-layer and few-layer graphene is relatively high, and it does not have the conditions for large-scale industrial production. Therefore, graphite is completely used in the preparation of hydrocracking catalyst carriers. Graphene not only does not have very good cracking performance, but also has poor economic efficiency, but the activity, thermal conductivity and stability of the catalyst can be significantly improved by using graphene as an additive. Catalyst for mass production of biojet fuel

Method used

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  • Selective hydrogenation catalyst for producing aviation kerosene and preparation method and application thereof
  • Selective hydrogenation catalyst for producing aviation kerosene and preparation method and application thereof
  • Selective hydrogenation catalyst for producing aviation kerosene and preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0049] Raw material preparation and purchase

[0050] 1, the preparation method of graphite oxide, concrete steps are as follows:

[0051] 1) Weigh 1g of natural graphite and 1g of anhydrous NaNO 3 Slowly put in 50ml concentrated H in an ice bath 2 SO 4 In, with 6gKMnO 4 Slowly add the oxidizing agent for oxidation treatment for 0.5h (stir continuously during the period), this is the pre-oxidation stage;

[0052] 2) Put the flask in a 35°C water bath and stir for 2 hours, then slowly add 200ml of deionized water, during which the temperature should not exceed 50°C, then transfer to a 98°C water bath and continue to stir for 30 minutes at high temperature. Dilute to 400ml, slowly add 30ml of H 2 o 2 (mass fraction is 30%), filtered while hot, fully centrifuged and washed with 5% HCl, until there is no SO in the filtrate 4 2- , and then centrifuged and washed several times with deionized water to remove Cl - , until the solution becomes neutral;

[0053] 3) Transfer th...

Embodiment 1

[0065] The preparation method of graphene additive 1, concrete steps are as follows:

[0066] 1) Weigh 1g of graphite oxide and add it to 1L of deionized water, and sonicate it at 180W at 40°C for 2h. After the sonication is over, add 2mL of 0.02mol / L PdCl to the solution 2 solution, stirred at room temperature for 10 h to obtain a mixed solution;

[0067] 2) Add 50ml of 0.2mol / L NaBH to the mixed solution under the condition of a water bath at a temperature of 75°C 4 The solution was reduced for 4 hours. After the reaction solution was cooled, the solution was centrifuged and washed twice with water, then washed twice with ethanol, and then washed several times with centrifuged water to completely remove Cl. - (with AgNO 3 test). The substance obtained by centrifugation was freeze-dried in a freeze dryer for 20 hours, and the graphene additive 1 was obtained after grinding.

[0068] The preparation method of carrier 1, the specific steps are as follows:

[0069] 1) Weigh...

Embodiment 2

[0075] The preparation method of graphene additive 2, concrete steps are as follows:

[0076] 1) Weigh 1g of graphite oxide and add it to 1L of deionized water, and sonicate it at 180W at 40°C for 2h. After the sonication is over, add 2mL of 0.01mol / L PtCl to the solution 4 solution, stirred at room temperature for 10 h to obtain a mixed solution;

[0077] 2) Add 50ml of 0.2mol / L NaBH to the mixed solution under the condition of a water bath at a temperature of 75°C 4 The solution was reduced for 4 hours. After the reaction solution was cooled, the solution was centrifuged and washed twice with water, then washed twice with ethanol, and then washed several times with centrifuged water to completely remove Cl. - (with AgNO 3 inspection); the substance obtained by centrifugation was placed in a freeze dryer for 20 hours to be freeze-dried, and after grinding, the graphene additive 2 was obtained.

[0078] The preparation method of carrier 2, the specific steps are as follows:...

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Abstract

The invention discloses a selective hydrogenation catalyst for producing biological aviation kerosene and a preparation method and an application thereof. The catalyst comprises a carrier and a main metal active component; the main metal active component is loaded on the carrier; the main active metal component accounts for 0.05-1.15 wt% of the catalyst finished product and is Pt or / and Pd; the carrier comprises the raw materials by the weight percentage: 2-10% of molecular sieve, 25-65% of amorphous silicon aluminum, 30-65% of alumina and 2-10% of a graphene auxiliary agent. The method comprises the steps: placing the carrier in a solution containing Pt and / or Pd metal salts, and immersing for 4-20 h, to obtain a carrier after impregnation; and drying the carrier obtained after impregnation, and then treating the dried carrier in a reducing atmosphere, to obtain the selective hydrogenation catalyst. Under the same loading capacity, the selective hydrogenation catalyst has larger representative active surface area and more active sites, reduces the reaction temperature, and improves the hydrogenation performance.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a selective hydrogenation catalyst for biodiesel production, its preparation method and application. Background technique [0002] The most notable features of the low-temperature Fischer-Tropsch synthesis reaction are wide product distribution, low product selectivity, low content of isomer products, and most of the products are straight-chain hydrocarbons. The above characteristics lead to very low octane number of Fischer-Tropsch synthetic gasoline fraction, high freezing points of kerosene fraction and diesel fraction, which limit the use of Fischer-Tropsch synthetic oil as fuel oil to a certain extent. [0003] Low-temperature Fischer-Tropsch synthetic paraffin can be hydrocracked and isomerized to produce aviation kerosene, and the quality of the resulting aviation kerosene can be improved by adjusting the ratio of high-carbon isoparaffins to normal paraffins. Since the degree of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74B01J29/12B01J29/80B01J29/85C10G45/12
CPCB01J29/12B01J29/74B01J29/80B01J29/85C10G45/12B01J29/7415B01J29/126C10G2300/202C10G2300/70
Inventor 王春锋石友良许莉杨伟光赖波赵焘
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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