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Preparation method of dry gas hydrogen production preconversion catalyst

A catalyst and pre-conversion technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low-temperature reduction performance, poor low-temperature activity, and good performance

Active Publication Date: 2013-12-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The active metal of the pre-reforming catalyst proposed in Chinese patent CN1301666A is nickel, the promoter is an oxide of alkaline earth metal, and two types of inorganic oxide refractory materials with high porosity and high strength are added. The catalyst has good performance and methane yield Higher, but its low-temperature reducing performance and low-temperature activity are poor

Method used

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  • Preparation method of dry gas hydrogen production preconversion catalyst
  • Preparation method of dry gas hydrogen production preconversion catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The weight ratio of each component of the prereforming catalyst in this embodiment is shown in Table 1 below:

[0016] Table 1 Embodiment 1 catalyst composition

[0017] components

NiO

MgO

Al 2 o 3

La 2 o 3

MO X

Proportion

35

15

45

2

3

[0018] (1) Preparation of reactant raw materials:

[0019] A. First, weigh 18g of aluminum hydroxide and 3g of heavy magnesium oxide, perform ball milling and mixing for 1.5hr-2hr, and then roast at a high temperature of 1100°C-1300°C for 2hr-4hr to prepare the carrier.

[0020] B, 260g / L Ni(NO 3 ) 2 Solution 25ml, M(NO 3 ) x (M is one or more of Zr, Y, Ag, Co, Cu, Zn, K) salt 1.8g, 360g / L La(NO 3 ) 2 Solution 1.2ml, the three solutions are mixed for use;

[0021] C. Na 2 CO 3 Solution configuration: saturated sodium carbonate solution for use.

[0022] (2) Neutralize precipitation:

[0023] A. In a water bath at 40°C±5°C, add the B and C solu...

Embodiment 2

[0035] The weight ratio of each component of the prereforming catalyst in this embodiment is shown in Table 2 below:

[0036] Table 2 Embodiment 2 catalyst composition

[0037] components

NiO

MgO

Al 2 o 3

La 2 o 3

MO X

Proportion

40

10

45

2

3

[0038] (1) Preparation of reactant raw materials:

[0039] A. First, weigh 18g of aluminum hydroxide and 2g of heavy magnesium oxide, perform ball milling and mixing for 1.5hr-2hr, and then roast at a high temperature of 1100°C-1300°C for 2hr-4hr to prepare the carrier.

[0040] B, 260g / L Ni(NO 3 ) 2 Solution 30ml, M(NO 3 ) x Salt 1.8g, 360g / L La(NO 3 ) 2 Solution 1.2ml, the three solutions are mixed for use;

[0041] C. Na 2 CO 3 Solution configuration: saturated sodium carbonate solution for use.

[0042] (2) Neutralize precipitation:

[0043]A. In a water bath at 40°C±5°C, add the B and C solutions configured in (1) into the reactor side-by...

Embodiment 3

[0055] The weight ratio of each component of the prereforming catalyst in this embodiment is shown in the following table 3:

[0056] Table 3 Embodiment 3 Catalyst Composition

[0057] components

NiO

MgO

Al 2 o 3

La 2 o 3

MO X

Proportion

45

10

40

2

3

[0058] (1) Preparation of reactant raw materials:

[0059] A. First, weigh 12g of aluminum hydroxide and 2g of heavy magnesium oxide, perform ball milling and mixing for 1.5hr-2hr, and then roast at a high temperature of 1100°C-1300°C for 2hr-4hr to prepare the carrier.

[0060] B, 260g / L Ni(NO 3 ) 2 Solution 40ml, M(NO 3 ) x Salt 1.8g, 360g / L La(NO 3 ) 2 Solution 1.2ml, the three solutions are mixed for use;

[0061] C. Na 2 CO 3 Solution configuration: saturated sodium carbonate solution for use.

[0062] (2) Neutralize precipitation:

[0063] A. In a water bath at 40°C±5°C, add the B and C solutions configured in (1) into the reacto...

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Abstract

The invention relates to a preparation method of a dry gas hydrogen production preconversion catalyst. The method includes: taking heavy magnesium oxide and aluminum hydroxide as raw materials, mixing them to conduct ball milling, performing calcination at 1100-1300DEG C to prepare an MgAl2O4 spinel carrier; in a water bath, neutralizing a prepared mixed solution of Ni(NO3)2, M(NO3)x and La(NO3)2, and an Na2CO3 saturated solution, and adding the obtained solution into a reactor dropwisely, keeping the terminal pH value of the reaction solution at 6.5-7, subjecting an obtained precipitate filter cake to drying, roasting and ball milling mixing so as to obtain a semi-finished catalyst product; mixing the semi-finished product with a lubricant and deionized water and carrying out tabletting molding, thus obtaining the finished catalyst product. In M(NO3)x, the M is one or more of Zr, Y, Ag, Co, Cu, Zn and K. The catalyst prepared by the method is used for low temperature preconversion of refinery dry gas, liquefied gas, and oil field gas. The low temperature reduction performance of the catalyst is improved, so that the catalyst has better low-temperature activity and high stability.

Description

technical field [0001] The invention relates to a preparation method of a pre-reforming catalyst for hydrogen production from dry gas in a refinery. The catalyst synthesized by the method has good low-temperature activity and low-temperature reduction performance, high anti-coking performance, and high total carbon conversion rate. Background technique [0002] At present, due to the improvement of environmental protection requirements, it is required to upgrade the quality of gasoline and diesel products, which will inevitably increase the hydrogenation depth of existing hydrogenation units, and the hydrogen consumption will increase accordingly. In addition, a large number of new hydrogenation units are put into operation and Heavy crude oil will require a large amount of hydrogen, resulting in a further increase in the hydrogen gap. Hydrocarbon steam reforming hydrogen production is currently the main source of hydrogen in refineries. The hydrocarbon steam reforming hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/89C01B3/40
CPCY02P20/52
Inventor 徐显明张晓霞裴皓天徐艳王东军蒋毅陈君和刘红岩张宝军王桂芝张敏李文鹏李建忠李方伟马丽娜褚洪岭肖海成郁向民张爱萍曾群英
Owner PETROCHINA CO LTD
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