Synthetic gas methanation catalyst preparation method

A catalyst and gas methane technology, which is applied in the field of preparation of supported molybdenum-based catalysts and can solve the problems of waste catalyst pollution and the like

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method not only utilizes the Mo, Co and alumina supports in the spent hydrotreating catalyst, but also makes full use of the Ni and V deposited on the spent hydrotreating catalyst, which solves the pollution problem of spent catalysts, saves resources and improves benefits , is technically easy to implement, and the resulting synthesis gas methanation catalyst has the characteristics of low cost, high utilization rate of metal components and good selectivity

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Embodiment 1

[0026]The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain catalyst precursor A, wherein Mo accounted for 6.8wt% by weight of catalyst precursor A in terms of elements, Co accounts for 1.8wt% of the weight of the catalyst precursor A in terms of elements, Ni accounts for 1.9wt% of the weight of the catalyst precursor A in terms of elements, and V accounts for 2.2wt% of the weight of the catalyst precursor A in terms of elements; Activate in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; 4.06g of nickel nitrate is dissolved in 16mL of deionized water to obtain solution B. And the mass fraction of its 4 times mass is that the furfural aqueous solution of 40% mixes evenly, joins in the ...

Embodiment 2

[0028] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain catalyst precursor A, wherein Mo accounted for 6.8wt% by weight of catalyst precursor A in terms of elements, Co accounts for 1.8wt% of the weight of the catalyst precursor A in terms of elements, Ni accounts for 1.9wt% of the weight of the catalyst precursor A in terms of elements, and V accounts for 2.2wt% of the weight of the catalyst precursor A in terms of elements; Activate in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; 2.82g of nickel nitrate is dissolved in 16mL of deionized water to obtain solution B. And mix it with 4 times the mass fraction of 40% furfural aqueous solution, and then add it to the autoclave toge...

Embodiment 3

[0030] The spent hydrotreating catalyst (MoCo / Al 2 o 3 ), the oil on the catalyst surface was removed by petroleum ether extraction, dried at 110°C for 8 h, and the obtained catalyst was calcined at 450°C for 4 h to obtain catalyst precursor A, wherein Mo accounted for 6.8wt% by weight of catalyst precursor A in terms of elements, Co accounts for 1.8wt% of the weight of the catalyst precursor A in terms of elements, Ni accounts for 1.9wt% of the weight of the catalyst precursor A in terms of elements, and V accounts for 2.2wt% of the weight of the catalyst precursor A in terms of elements; Activate in a mixed atmosphere of hydrogen, the volume content of hydrogen in the mixed gas is 80%, the reduction conditions are 450°C, 0.2MPa (absolute pressure), and the reduction time is 4h; 6.54g of nickel nitrate is dissolved in 16mL of deionized water to obtain solution B. And mix it with 4 times the mass fraction of 40% furfural aqueous solution, and then add it to the autoclave toge...

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Abstract

The present invention relates to a synthetic gas methanation catalyst preparation method, wherein the catalyst comprises an active component, an auxiliary agent, and a carrier. The preparation method comprises: preparing a catalyst precursor A, and reducing the catalyst precursor A; dissolving an auxiliary agent precursor in water, and uniformly mixing with a furfural aqueous solution; adding the obtained mixture and the catalyst precursor A to a high pressure reaction kettle, adding a solution C, and carrying out a reaction; and treating and separating the obtained solid-liquid mixture, filtering the obtained solid sample, drying, and calcining to obtain the catalyst. According to the present invention, the waste residue oil hydrotreating catalyst is completely utilized so as to save the cost; and the prepared catalyst has characteristics of high reaction activity, metal consumption reducing, and methane selectivity improving.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for syngas methanation, in particular to a method for preparing a supported molybdenum-based catalyst for syngas methanation. Background technique [0002] Methanation refers to CO / CO 2 with H 2 Under certain temperature, pressure and catalyst action, generate CH 4 At present, this reaction is widely used in the removal of trace carbon in the synthesis of ammonia or hydrogen production, methanation of coke oven gas, and coal-to-natural gas. Methanation is an important catalytic technology, especially in fuel applications, where it can be used to increase the calorific value of gas, allowing the conversion of coke oven gas, coal or biomass to natural gas. In recent years, with the rapid development of my country's coal-based natural gas industry, methanation, one of the core technologies, has received more and more attention. [0003] China is a country rich in coal, poor in oil, and low in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J37/08B01J37/18C10L3/08
CPCB01J23/8877B01J37/08B01J37/18C10L3/08
Inventor 孙晓丹张舒冬刘继华
Owner CHINA PETROLEUM & CHEM CORP
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