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A kind of catalyst for improving the hydrogenation activity of Nimo diesel hydrorefining catalyst and preparation method thereof

A hydrofining and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc. problem, to achieve high hydrogenation effect, high hydrogenation activity, high desulfurization rate and the best effect

Active Publication Date: 2018-03-06
山东鹤鹏技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing studies, various organic ligands are basically used as an additive component in the immersion solution, and the dosage is relatively small, and the concept of Ni, Mo monometallic or bimetallic complex precursors has not been proposed.
At the same time, the existing literature only cares about the hydrodesulfurization (HDS) performance of the catalyst, and does not examine the change of the hydrogenation activity of the catalyst, and the high hydrogenation activity of the catalyst is of great significance in the actual hydrogenation process of the diesel system industry.

Method used

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  • A kind of catalyst for improving the hydrogenation activity of Nimo diesel hydrorefining catalyst and preparation method thereof
  • A kind of catalyst for improving the hydrogenation activity of Nimo diesel hydrorefining catalyst and preparation method thereof
  • A kind of catalyst for improving the hydrogenation activity of Nimo diesel hydrorefining catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0034] Example of hydrodesulfurization activity of catalyst model compounds prepared by citric acid complex precursor method Typical citric acid complex method NiMo / Al 2 o 3 The preparation method of hydrogenation catalyst is:

[0035] First, a NiMo-citric acid bimetallic complex solution is prepared, and the bimetallic complex impregnation solution with a Ni / Mo atomic ratio of 0.5 and a citric acid / Mo molar ratio of about 0.67 is taken as an example for illustration.

[0036] (1) Weigh 2.896g of ammonium molybdate tetrahydrate (the Mo atom is 0.0164mol) and citric acid 2.458g (ie 0.0117mol) into a beaker, add about 6mL of deionized water, and ultrasonically disperse in an ultrasonic cleaner to completely dissolved;

[0037] (2) Weigh 2.385g (ie 0.0082mol) of nickel nitrate and place it in the Mo-CA solution of (1), add deionized water to the beaker to make up to 10mL.

[0038] Take a certain quality strip of macroporous Al calcined at 550°C 2 o 3 carrier, the Al 2 o 3 ...

Embodiment 3

[0045] The hydrodesulfurization activity of the model compound of the catalyst prepared by the method of the citric acid complex precursor was studied. The example of changing the calcination temperature.

[0046] Preparation of NiMo / Al by Citric Acid Complex Precursor Method 2 o 3 The preparation method of the catalyst is shown in Example 2. In this example, the ratio of the fixed catalyst is: the Ni / Mo atomic ratio is 0.5, and the molar ratio of citric acid / Mo is about 0.67. Focusing on the influence of catalyst calcination conditions on the preparation of NiMo / Al by citric acid complex precursor method 2 o 3 The HDS activity of the catalyst and the influence of hydrogenation selectivity.

[0047] Preparation of NiMo / Al by Citric Acid Complex Precursor Method 2 o 3 The presulfurization and activity evaluation conditions of the catalyst are the same as in Example 1, and the specific activity evaluation results are shown in Table 2.

[0048] The catalyst calcination con...

Embodiment 4

[0053] The hydrodesulfurization activity of the model compound of the catalyst prepared by the citric acid complex precursor method was investigated. The example of changing the order of metal introduction.

[0054] Preparation of NiMo / Al by Citric Acid Complex Precursor Method 2 o 3 The preparation method of the catalyst is shown in Example 2. In this example, the ratio of the fixed catalyst is: the Ni / Mo atomic ratio is 0.5, and the molar ratio of citric acid / Mo is about 1.0. Focus on the NiMo / Al preparation process of NiMo-citric acid impregnation solution, the introduction sequence of Ni and Mo metals on the citric acid complex precursor method 2 o 3 The HDS activity of the catalyst and the influence of hydrogenation selectivity.

[0055] The metal introduction sequence is: first Ni and then Mo, first Mo and then Ni, and NiMo at the same time.

[0056] Preparation of NiMo / Al by Citric Acid Complex Precursor Method 2 o 3 The presulfurization and activity evaluation c...

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Abstract

The invention provides a catalyst and a preparation method for improving the hydrogenation activity of a NiMo diesel hydrotreating catalyst. It includes a porous alumina carrier, a metal component with diesel hydrodesulfurization activity, an organic chelate and a certain amount of water, wherein: the porous alumina carrier uses pseudo-boehmite as a precursor after 500- The porous alumina carrier obtained by calcination at 600 degrees; the metal component with diesel hydrodesulfurization activity is mainly composed of Mo of the VIB group, the auxiliary component is Ni of the VIII group, and the Ni / Mo atomic ratio range is 0.2-1.0; the organic chelate is citric acid, and the molar ratio range of citric acid / Mo is 0.5-2.0. The hydrogenation activity of the obtained NiMo / γ-Al2O3 hydrogenation catalyst was greatly improved by adjusting the catalyst preparation process and parameters, especially the preparation process of the citric acid double metal complex precursor solution. When the catalyst is applied to the hydrotreating of diesel fractions, it exhibits ideal HDS activity and a hydrogenation activity better than that of the reference catalyst.

Description

technical field [0001] The invention relates to the technical field of hydrotreating catalysts, in particular to a catalyst for improving the hydrogenation activity of a NiMo diesel hydrotreating catalyst and a preparation method thereof. Background technique [0002] With the increasing environmental protection requirements worldwide and the increasingly stringent automobile exhaust emission standards, especially in recent years, my country has attached great importance to PM2.5 particulate matter emissions (because vehicle fuel exhaust emissions contribute a large proportion to PM2.5) , domestic gasoline and diesel sulfur standards have fully entered the era of National IV and National V quality standards. This situation urgently requires the development of new hydrorefining catalysts that can meet the requirements of ultra-low sulfur vehicle gasoline and diesel production. [0003] Among them, the research on diesel hydrotreating catalyst has important practical significa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883C10G45/08
Inventor 李彦鹏刘大鹏李爱婷李飞飞刘晨光
Owner 山东鹤鹏技术有限公司