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Moulding olivine nickel-loaded catalyst and preparation method thereof

A catalyst and olivine technology, applied in the field of biomass and coal gasification, can solve the problems of small surface area, high catalytic reaction temperature, fast catalyst deactivation, etc., achieve strong anti-carbon deposition ability, improve utilization rate, and high carbon conversion rate Effect

Inactive Publication Date: 2008-12-31
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to disclose a molded olivine-supported nickel catalyst and a preparation method thereof, aiming at the shortcomings of the existing tar conversion catalysts that are easily deactivated and the catalytic reaction temperature is high, so as to solve the problem of catalyst loss caused by the low porosity and small surface area of ​​the olivine carrier. jolly question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Pulverize raw ore olivine particles into a powder of less than 300 meshes, take 7g of olivine powder, fully mix with 3g of high alumina cement, and 0.1g of charcoal powder, add 1.2g of deionized water and fully stir to form;

[0026] (2) The molded carrier was cured for 15 days, and then sintered at a high temperature of 1200° C. for 3 hours in an air atmosphere. The resulting shaped carrier is marked as S A ;

[0027] (3) impregnate the above-mentioned molding carrier with nickel nitrate aqueous solution for 2 hours, evaporate the water with a vacuum rotary evaporator, dry at 105° C. for 12 hours, and then bake at 800° C. for 4 hours in an air atmosphere;

[0028] The concentration of nickel nitrate aqueous solution is 1M;

[0029] The consumption of the nickel nitrate aqueous solution is based on the consumption of nickel oxide, which is 5 wt% of the calcined olivine-supported nickel catalyst.

[0030] The obtained catalyst is designated as A.

Embodiment 2

[0032] (1) Pulverize raw ore olivine particles into a powder of less than 300 meshes, take 8g of olivine powder, fully mix with 2g of high alumina cement, and 0.3g of charcoal powder, add 1.2g of deionized water and fully stir to form;

[0033] (2) The molded carrier was cured for 15 days, and then sintered at a high temperature of 1200° C. for 3 hours in an air atmosphere. The resulting shaped carrier is marked as S B ;

[0034] (3) Co-impregnate the above-mentioned shaped carrier with nickel nitrate and lanthanum nitrate aqueous solution for 2 hours, evaporate the water with a vacuum rotary evaporator, dry at 105°C for 12 hours, and then bake at 800°C for 4 hours in an air atmosphere;

[0035] The concentration of nickel nitrate aqueous solution is 1M;

[0036] The consumption of nickel nitrate is based on the consumption of nickel oxide, which is 8wt% after the roasting of said shaped olivine-supported nickel catalyst, and the consumption of lanthanum nitrate is based on ...

Embodiment 3

[0039] (1) Pulverize raw ore olivine particles into a powder of less than 300 meshes, take 7.5g of olivine powder, fully mix with 2g of high-alumina cement, 0.3g of carbon powder, and 0.5g of magnesium oxide, add 1.3g of deionized water and fully stir to form;

[0040] (2) The molded carrier was cured for 15 days, and then sintered at a high temperature of 1200° C. for 3 hours in an air atmosphere. The resulting shaped carrier is marked as S C ;

[0041] (3) impregnate the above-mentioned molding carrier with nickel nitrate aqueous solution for 2 hours, evaporate the water with a vacuum rotary evaporator, dry at 105° C. for 12 hours, and then bake at 800° C. for 4 hours in an air atmosphere;

[0042] The concentration of nickel nitrate aqueous solution is 1M;

[0043]The consumption of nickel nitrate is based on the consumption of nickel oxide, which is 8wt% of the said shaped olivine-supported nickel catalyst after roasting.

[0044] The obtained catalyst is designated as ...

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Abstract

The invention relates to a molded olivine supported nickel catalyst and a preparation method thereof. The catalyst is composed of a molded olivine carrier supported nickel as a main active component and lanthanide metal oxide adjuvant components, wherein, the Nio content is 3 - 28wt%, and the content of lanthanide metal oxide adjuvant such as La2O3 or CeO2 is 0 - 5wt%. The catalyst is prepared by adopting carrier presintering and immersion method, and the molded carrier is prepared by the processes of mixing, molding, curing, and calcining the mixture consisting of olivine powder, a cement binder, adjuvant magnesia, graphite powder or carbon powder, and then the molded carrier is immersed in a nickel nitrate aqueous solution or mixed aqueous solution of nickel nitrate and lanthanum nitrate or mixed aqueous solution of nickel nitrate and cerous nitrate, thus the catalyst is obtained. The catalyst prepared by the method is characterized by good strength, high efficiency of carbon conversion and strong carbon deposition resistance.

Description

technical field [0001] The invention belongs to the field of biomass and coal gasification, in particular to a shaped olivine-supported nickel catalyst and a preparation method thereof. Background technique [0002] Biomass gasification gas contains tar and H 2 S, HCl, NH 3 , Alkali metal and other impurities and particles, the purification of gas, especially the technology of tar removal is one of the bottleneck problems restricting the development of biomass gasification technology and the utilization of gas. [0003] Catalytic cracking method to remove tar is an advanced technology that is different from physical methods such as water washing, filtration, electrostatic method, etc. It converts tar in the produced gas into low molecular gases such as carbon monoxide and hydrogen by catalytic action at a lower temperature compound. The use of tar conversion catalyst not only eliminates tar in gas production, solves the problem of tar corrosion and pollution to downstream...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10L3/00
Inventor 徐绍平杨小芹于建华刘淑琴刘长厚
Owner DALIAN UNIV OF TECH
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