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Iron-based compound oxygen carrier and preparation method thereof

An oxygen carrier, iron-based technology, applied in chemical instruments and methods, chemical/physical processes, fuel additives, etc. Oxygen capacity is poor, the scope of use is limited, etc., to achieve the effect of high reactivity and tar removal rate, convenient industrial continuous production, and unique formula

Inactive Publication Date: 2015-06-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, oxides such as Cu, Mn, Ni, and Co are widely used as metal oxygen carriers, but due to factors such as high cost, complex preparation process, and low reactivity, they cannot meet the requirements of biomass chemical chain hydrogen production and tar suppression. Generate collaborative process requirements
Iron-based oxygen carriers have been widely studied due to their low price and environmental friendliness, however, their reactivity and oxygen-carrying capacity are poor
Chinese patent CN103288048 A discloses a process method for hydrogen production by continuous catalytic adsorption and enhanced chemical chain reforming in a moving bed. Glycerin, a by-product of biodiesel, is used as a raw material for hydrogen production, and CaO is used as an adsorbent for CO 2 In-situ adsorption enhanced hydrogen production, continuous catalytic partial oxidation steam reforming in the reforming reactor; Chinese patent CN103551182 A discloses a catalyst for catalytic cracking of biomass tar and its preparation method. The prepared catalyst is mainly used in traditional Biomass gasification; Chinese patent CN103113955A is a method for preparing a nano-scale porous iron-based oxygen carrier for bio-oil chemical chain hydrogen production. The preparation method is a sol-gel method, but it does not add a K-type catalyst, so it cannot Let the tar in the biomass gasification process be fully cracked; Chinese patent CN103849444A discloses a copper-based composite oxygen carrier and its preparation method, which adopts the sol-gel method, controls the appropriate reaction conditions, and prepares a uniform particle size. Good copper-based composite oxygen carrier, but the scope of use is limited due to the high price of copper-based

Method used

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  • Iron-based compound oxygen carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: An iron-based composite oxygen carrier is prepared by the following method:

[0029] Take 40.40 g Fe(NO 3 ) 3· 9H 2 O was placed in a 500 mL beaker, 80 mL of deionized water was added, and then the beaker was placed on a magnetic stirrer with a constant temperature water bath for stirring; 25.21g of Al(NO 3 ) 3· 9H 2 O and 3.66 g Ni(NO 3 ) 2· 6H 2O was added to a 100 mL beaker, and 50 mL of deionized water was added and stirred. Al(NO 3 ) 3· 9H 2 O and Ni(NO 3 ) 2· 6H 2 The mixture of O was added to Fe(NO 3 ) 3· 9H 2 O solution, and stirred at 45°C until completely dissolved. Add 36.43 g of citric acid into a 100 mL beaker, and add 40 mL of deionized water to stir until the citric acid is completely dissolved, then add it to the above mixed salt solution, and stir the mixture at 72°C for 8 hours to form a coagulate gel, and then place the wet gel at room temperature for 18 hours to form a wet gel. The wet gel was heated at 75°C for 6...

Embodiment 2

[0031] Embodiment 2: get 40.40 g Fe(NO 3 ) 3· 9H 2 O was placed in a 500 mL beaker, 80 mL of deionized water was added, and then the beaker was placed on a magnetic stirrer with a constant temperature water bath for stirring; 25.21 g of Al(NO 3 ) 3· 9H 2 O and 3.66 g Ni(NO 3 ) 2· 6H 2 O was added to a 100 mL beaker, and 50 mL of deionized water was added and stirred. Al(NO 3 ) 3· 9H 2 O and Ni(NO 3 ) 2· 6H 2 The mixture of O was added to Fe(NO 3 ) 3· 9H 2 O solution, and stirred at 50°C until completely dissolved. Add 36.43 g of citric acid into a 100 mL beaker, add 40 mL of deionized water and stir until the citric acid is completely dissolved, then add it to the above mixed salt solution, and stir the mixture at 75 °C for 6 hours to form a coagulate gel, and then place the wet gel at room temperature for 18 hours to form a wet gel. The wet gel was heated at 70°C for 8 hours, and then heated at 105°C for 14 hours to form a dry gel. Take out the dry gel,...

Embodiment 3

[0034] Embodiment 3: An iron-based composite oxygen carrier is prepared by the following method:

[0035] Take 40.40g Fe(NO 3 ) 3 9H 2 O into a 500 ml beaker, add 80 ml of deionized water, and then place the beaker on a magnetic stirrer with a constant temperature water bath for stirring. Then put 25.21 g Al(NO 3 ) 3 9H 2 O and 3.66 gNi(NO 3 ) 2 ·6H 2 O was added to a 100 ml beaker, and 50 ml of deionized water was added and stirred. Then Al(NO 3 ) 3 9H 2 O and Ni(NO 3 ) 2 ·6H 2 Add Fe(NO 3 ) 3 9H 2 O solution, and stirred at 45°C until completely dissolved. Take 36.43 g of citric acid and add it to a 100 ml beaker, add 40 ml of deionized water and stir until the citric acid is completely dissolved, and then add it to the above mixture. The mixture was stirred at 72° C. for 8 hours to form a gel, and then the wet gel was left at room temperature for 18 hours to form a wet gel. The wet gel was heated at 75°C for 5 hours, and then heated at 110°C for 13 hour...

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Abstract

The invention provides an iron-based compound oxygen carrier applicable to biomass chemical looping hydrogen production and inhibition to tar generation, and a preparation method of the oxygen carrier. The iron-based compound oxygen carrier comprises the following chemical components in parts by mass: 60-70 parts of Fe2O3, 25-30 parts of Al2O3, 5-10 parts of NiO, 0-10 parts of K2CO3; the iron-based compound oxygen carrier is prepared by a collosol-gel method. The iron-based compound oxygen carrier prepared by the preparation method is good in porosity and dispersity, high in activity, and uniform in particle size; Ni and K in the oxygen carrier have better catalytic action on cracking of tar in the gasification process; and the oxygen carrier is applicable to a combined collaborative technology of the biomass chemical looping hydrogen production and the inhibition to the tar generation, and has the characteristics of high gasification efficiency, effectiveness in tar removal, and the like.

Description

technical field [0001] The invention belongs to the technical field of solid fuel chemical looping gasification, and specifically relates to an iron-based composite oxygen carrier suitable for biomass chemical looping hydrogen production and tar suppression synergistic process and a preparation method thereof. Background technique [0002] At present, the development and utilization of renewable energy has become a topic of common concern in all countries. With the development of science and technology, the demand for energy in various countries is increasing, while the total amount of fossil fuels is decreasing year by year. At the same time, fossil fuels also bring more and more serious environmental problems, so it has become an inevitable trend to replace traditional fossil fuels with renewable energy. Biomass gasification technology has gradually become the focus of research and attention. [0003] The problems of tar and high energy consumption in the process of bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00B01J27/232
Inventor 冉景煜张松秦昌雷杨琳杨仲卿闫云飞蒲舸张力
Owner CHONGQING UNIV
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