Layered composite hydrodesulphurization catalyst and preparation method

A hydrodesulfurization and catalyst technology, which is applied in the field of catalytic materials and air pollution control, can solve the problems of complex and cumbersome modification process, high cost, and low efficiency of catalyst desulfurization

Active Publication Date: 2018-06-12
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang Lei, Fu Wenqian, YuQuanyong, Tang Tiandi, Zhao Yicheng, Zhao Huawang, Li Yongdan, Journal of Catalysis, 2016, 338, 210-221 reported the synthesis of a layered zeolite molecular sieve (MOR) as a carrier, and phosphating the active component Nickel nanoparticles are uniformly dispersed in the sheet molecular sieve structure, showing good hydrodesulfurization activity and stability; CN103769121A discloses a preparation method of a hydroprocessing catalyst, which performs high-temperature hydrothermal modification on clay under acidic conditions treatment, and then use aluminum-containing acidic solution and alkaline solution to reprocess the modified clay to prepare a catalyst carrier, and finally introduce active components through impregnation or kneading to prepare a hydrodesulfurization catalyst. The catalytic desulfurization efficiency is not high
The hydrodesulfurization catalysts prepared by the above different methods either require high-cost layered zeolite molecular sieve supports, or the modification process of the supports is complicated and cumbersome, and the desulfurization efficiency of the catalysts is not high

Method used

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  • Layered composite hydrodesulphurization catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Prepare 2.0wt% oxalic acid solution 100g, add 4.1g ammonium molybdate to it and stir until dissolving, then add 34.1g nickel nitrate and 5.8g ammonium metatungstate, after dissolving, pre-prepared 20wt% organic matter (hexadecane Trimethylammonium bromide) modified layered montmorillonite (organic matter content is 30wt%) slurry 100g is poured into the above solution, placed in 20 ℃ and stirred for 60h to obtain a mixed solution, wherein the molar ratio of nickel molybdenum tungsten 5:1:1.

[0025] (2) Stir the above mixed solution for 4 hours at 100°C to form a solid mixture, then stir the mixture evenly with 0.2g plasticizer (accounting for 0.5wt% of the solid mixture), extrude and place in 110 °C for 10 hours to obtain a precursor material.

[0026] (3) Calcining the above-mentioned dried precursor material at 450° C. for 8 hours to prepare a catalyst precursor.

[0027] (4) Put the catalyst precursor into a fixed bed and use a carbon disulfide content of 4.5wt...

Embodiment 2

[0030] (1) prepare 1.0wt% citric acid solution 150g, add 1.0g ammonium paramolybdate to it and stir to dissolving, then add 48.6g nickel acetate and 9.8g ammonium tungstate, after dissolving, pre-prepared 45wt% organic (ten (octaalkyltrimethylammonium bromide) modified attapulgite (organic matter content is 25wt%) slurry 50g is poured into the above solution, placed in 30 ℃ and stirred for 48h, to obtain a mixed solution, wherein the mole of nickel molybdenum tungsten The ratio is 5:0.2:1.

[0031] (2) Stir the above mixed solution for 5 hours at a temperature of 90°C to form a solid mixture, then stir the mixture with 0.4g of plasticizer (accounting for 0.7wt% of the solid mixture), extrude and place in 100 °C for 16 hours to obtain the precursor material.

[0032] (3) Calcining the above dried precursor material at 500° C. for 6 hours to prepare a catalyst precursor.

[0033] (4) Put the catalyst precursor into a fixed bed and use 4wt% sulfide benzene solution under hydrog...

Embodiment 3

[0036] (1) prepare 2.0wt% citric acid solution 120g, add 2.7g ammonium paramolybdate to it and stir to dissolving, then add 22.2g nickel nitrate and 3.8g ammonium metatungstate, after dissolving, pre-prepared 25wt% organic matter ( Cetyltrimethylammonium bromide) modified attapulgite (organic matter content is 32wt%) slurry 80g is poured into the above solution, placed in 40 ℃ and stirred for 36h, to obtain a mixed solution, wherein nickel molybdenum tungsten The molar ratio is 5:0.9:1.

[0037] (2) Stir the above mixed solution for 5 hours at 80°C to form a solid mixture, then stir the mixture with 0.6g of plasticizer (accounting for 0.9wt% of the solid mixture), extrude it, and place it at 90 °C for 24 hours to obtain a precursor material.

[0038] (3) Calcining the above dried precursor material at 550° C. for 4 hours to prepare a catalyst precursor.

[0039](4) Put the catalyst precursor into a fixed bed and use 3wt% carbon disulfide in benzene solution at a pressure of ...

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Abstract

The invention relates to a layered composite hydrodesulphurization catalyst and a preparation method. With nickel-molybdenum-tungsten composite sulfide as a catalytic active component and organicallymodified layered clay as a carrier, nickel-molybdenum-tungsten composite sulfide nanoparticles are prepared by adsorption, coordination, impregnation, drying, extrusion, roasting and vulcanization, the nickel-molybdenum-tungsten composite sulfide nanoparticles are uniformly dispersed into the layered structure of the clay, forming the layered composite hydrodesulphurization catalyst, wherein the molar ratio of nickel to molybdenum to tungsten is (4.5 to 5.5) to (0.15 to 1.2) to 1, and the total mass content of the nickel, molybdenum and tungsten elements in the layered composite hydrodesulphurization catalyst is 28 to 45 percent. The desulphurization efficiency of the novel, efficient and stable hydrodesulphurization catalyst is up to 99 percent or above, and the layered composite hydrodesulphurization catalyst is particularly applicable to the removal of sulfur in petroleum products.

Description

technical field [0001] The invention relates to a hydrodesulfurization catalyst, in particular to a layered composite hydrodesulfurization catalyst and a preparation method thereof, which belong to the field of catalytic materials and air pollution control, and are especially suitable for deep desulfurization of petroleum products. Background technique [0002] The Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine issued the "Light-duty Vehicle Pollutant Emission Limits and Measurement Methods (China's Sixth Stage)" (referred to as the National Sixth Standard for Light-duty Vehicles), and announced the latest emission requirements and implementation time. In order to provide a certain buffer period for the upgrading of the automobile industry, the country has formulated two phase requirements of China VI A and China VI B (China VI A is equivalent to the transition stage between China V and China VI, and China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J27/051B01J27/24B01J37/08B01J37/20C10G45/08
CPCB01J23/888B01J27/0515B01J27/24B01J37/088B01J37/20C10G45/08C10G2300/202
Inventor 刘优林徐波洋沈岳松祝社民
Owner NANJING UNIV OF TECH
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