Preparation method for red mud-based iron-series catalyst and application of red mud-based iron-series catalyst in hydrogen production through cracking of methane

A catalyst and red mud technology, which is applied in the field of preparation of red mud-based iron-based catalysts, can solve the problems of low catalytic activity and stability, low content of active metal iron, and underdeveloped pore structure, etc., to achieve high added value Utilization, developed pore structure, and reduced production cost

Inactive Publication Date: 2016-04-13
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is applied to catalytic methane cracking to solve the problem of high catalyst cost, the content of active metal iro

Method used

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  • Preparation method for red mud-based iron-series catalyst and application of red mud-based iron-series catalyst in hydrogen production through cracking of methane
  • Preparation method for red mud-based iron-series catalyst and application of red mud-based iron-series catalyst in hydrogen production through cracking of methane
  • Preparation method for red mud-based iron-series catalyst and application of red mud-based iron-series catalyst in hydrogen production through cracking of methane

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Embodiment 1

[0029] A preparation method of red mud-based iron-based catalyst, comprising the following steps in parts by weight:

[0030] First dry the red mud at 100-120°C for 1-4 hours, crush, grind and sieve until the particle size is less than 75μm, take 10g of the dried red mud sample and put it into a 1000ml large beaker, pour 100ml of deionized water into the beaker, and stir After uniformity, put it into an ultrasonic cleaner for 3 minutes; then pour 500ml of pre-prepared 1mol / L dilute hydrochloric acid into the beaker, stir well, put it in a water bath with magnetic stirring, and place it in a constant temperature water bath at 60°C for 2 hours. Stirring rate is 300r / min; By the mass percent of Fe 10% (namely Fe(NO 3 ) 3 9H 2 The mass of elemental Fe in O accounts for the percentage of 10g raw material red mud mass after drying) accurately weighs 7.21g of Fe (NO 3 ) 3 9H 2 Dissolve O in 50ml of absolute ethanol, pour it into a beaker and stir evenly, then use ammonia water t...

Embodiment 2

[0036] A preparation method of red mud-based iron-based catalyst, comprising the following steps in parts by weight:

[0037]First dry the red mud at 100-120°C for 1-4 hours, crush, grind and sieve until the particle size is less than 75μm, take 10g of the dried red mud sample and put it into a 1000ml large beaker, pour 100ml of deionized water into the beaker, and stir After uniformity, put it into an ultrasonic cleaner for 3 minutes; then pour 500ml of pre-prepared 1mol / L dilute hydrochloric acid into the beaker, stir well, put it in a water bath with magnetic stirring, and place it in a constant temperature water bath at 60°C for 2 hours. Stirring speed is 300r / min; By the mass percent of Fe 20% (namely Fe(NO 3 ) 3 9H 2 The mass of elemental Fe in O accounted for the percentage of dried 10g raw material red mud mass) accurately weighed 14.42g of Fe (NO 3 ) 3 9H 2 Dissolve O in 50ml of absolute ethanol, pour it into a beaker and stir evenly, then use ammonia water to pr...

Embodiment 3

[0043] A preparation method of red mud-based iron-based catalyst, comprising the following steps in parts by weight:

[0044] First dry the red mud at 100-120°C for 1-4 hours, crush, grind and sieve until the particle size is less than 75μm, take 10g of the dried red mud sample and put it into a 1000ml large beaker, pour 100ml of deionized water into the beaker, and stir After uniformity, put it into an ultrasonic cleaner for 3 minutes; then pour 500ml of pre-prepared 1mol / L dilute hydrochloric acid into the beaker, stir well, put it in a water bath with magnetic stirring, and place it in a constant temperature water bath at 60°C for 2 hours. Stirring speed is 300r / min; By the mass percent of Fe 30% (namely Fe(NO 3 ) 3 9H 2 The mass of elemental Fe in O accounts for the percentage of 10g raw material red mud mass after drying) accurately weighs 21.63g of Fe (NO 3 ) 3 9H 2 Dissolve O in 50ml of absolute ethanol, pour it into a beaker and stir evenly, then use ammonia water...

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Abstract

The invention relates to a preparation method for red mud-based iron-series catalyst and application of the red mud-based iron-series catalyst in hydrogen production through cracking of methane. The preparation method is characterized in that alumina industrial waste, i.e., red mud, is used as a raw material and undergoes acid dissolution treatment, then a certain amount of iron is added into the treated red mud by using a homogeneous coprecipitation method and then drying, calcining and hydrogen reduction are successively carried out so as to obtain the red mud-based iron-series catalyst. The red mud-based iron-series catalyst has a more prosperous pore structure and higher content of active metal iron compared with red mud, the particle size of the catalyst is uniform, and the dispersity of metallic iron is good. The method has the following advantages: mineral components with catalytic and catalysis-assisting functions in red mud are given to full play; the pore structure of red mud is improved; introduction of iron enables the content of the active component of the catalyst to be increased, and activity and stability of red mud in catalytic cracking of methane for hydrogen production are substantially improved; and preparation cost for the catalyst for hydrogen production through cracking of methane is reduced, and an approach for resourceful and comprehensive utilization of red mud is created.

Description

technical field [0001] The invention belongs to the technical field of methane catalytic cracking hydrogen production, and in particular relates to a preparation method of a red mud-based iron-based catalyst and its application in methane cracking hydrogen production. Background technique [0002] Red mud (RM) is the waste residue of the aluminum smelting industry, because it contains a large amount of iron oxide (Fe 2 o 3 ) and appear red, and red mud also contains a large amount of oxides of aluminum, silicon, titanium and other metals. At present, red mud is mainly stored in the form of dams. On the one hand, it causes a waste of valuable metal resources in red mud. On the other hand, due to the strong alkalinity of red mud, it occupies land resources and pollutes soil and groundwater. . Therefore, it is imperative to develop and utilize red mud as a resource, recover useful metals, and reduce environmental pollution. At present, some personnel have conducted research...

Claims

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Application Information

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IPC IPC(8): B01J23/745C01B3/26
CPCB01J23/002B01J23/745B01J2523/00C01B3/26C01B2203/0277B01J2523/31B01J2523/41B01J2523/842
Inventor 刘全润方小可贾建波李国亮李鹏
Owner HENAN POLYTECHNIC UNIV
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