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Biomass pyrolysis gasification multifunctional iron-based catalyst

An iron-based catalyst, pyrolysis and gasification technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of catalyst absorption adjustment not mentioned, Low cracking rate of tar, inactivation of active metals and other problems, to achieve the effect of good storage/release oxygen capacity, enhanced interaction, and improved dispersion

Active Publication Date: 2014-11-19
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly prepares Ni-based catalysts, which are expensive, and are easily deactivated by sintering and carbon deposition in the reaction, and the tar cracking rate is low.
[0006] In the above-mentioned patents, the preparation of the tar cracking catalyst is mainly mentioned, and the catalyst is not mentioned to CO 2 Absorption and H 2 The problem of adjusting the ratio of / CO, and tar cracking catalysts generally have active metals that are easy to deactivate due to sintering and carbon deposition, and the tar cracking rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a biomass pyrolysis gasification multifunctional iron-based catalyst, comprising the steps of:

[0021] ①Carrier pretreatment: put 26g CaO in the muffle furnace, at 800 o C was calcined for 4h, and then ground and sieved to prepare 100-mesh CaO carrier particles.

[0022] ②Introduction of main active components: pretreated 26g, 100 mesh CaO carrier particles and 15.2mL 0.5g / mL Fe(NO 3 ) 3 9H 2 O solution mixed at 80 o Stir and impregnate at C for 2h, after the impregnation is completed, at 120 o C dried for 10h, the resulting sample was placed in a muffle furnace at 900 o C calcined for 3h, the calcined sample was placed in a desiccator to cool to room temperature, and then ground.

[0023] ③Introduction of co-active components: the steps The prepared sample was first mixed with 20.2mL 0.5g / mL Ce(NO 3 ) 3 ·6H 2 O solution was mixed and stirred at 60 o Immerse at C for 12h, at 200 o C dried for 20h, and then the resulting sample was pl...

Embodiment 2

[0029] The preparation method of the catalyst in this example is the same as that of Example 1, and the difference is that the active component content is different. The prepared catalyst consists of iron oxide: 5%, cerium oxide: 8%, zirconium oxide: 7% %, calcium oxide: 80%.

[0030] Catalyst evaluation was carried out under the same experimental conditions as in Example 1, and it was found that the gas component obtained after the reaction was (volume content): H 2 : 53.8%, CO: 26.9%, CO 2 : 7.2%, CH 4 : 12.1%, tar content is 0.06g / m 3 , the conversion rate of tar is 92.5%, H 2 When the / CO ratio is 2.0, the catalyst has stable reaction activity, no sintering, and no obvious carbon on the surface.

Embodiment 3

[0032] The preparation method of the catalyst in this embodiment is the same as that of Example 1 and will not be described again. The difference is that the active component content is different. The prepared catalyst consists of iron oxide: 20%, cerium oxide: 10%, zirconia: 10% %, calcium oxide: 60%.

[0033] Catalyst evaluation was carried out under the same experimental conditions as in Example 1, and it was found that the gas component obtained after the reaction was (volume content): H 2 : 49.9%, CO: 27.7%, CO 2 : 6.9%, CH 4 : 15.5%, tar content is 0.09g / m 3 , the tar conversion rate is only 88.7%, and the H 2 When the / CO ratio is 1.8, the reactivity of the catalyst tends to decrease with the increase of the reaction time, but the carbon deposition phenomenon is not obvious during sintering.

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Abstract

The invention relates to a multifunctional iron-based catalyst pyrolyzed and gasified by biomass, which comprises the following ingredients by weight: 5-15 parts of iron oxide, 8-13 parts of cerium oxide, 7-12 parts of zirconia and 60-80 parts of calcium oxide. A method for the catalyst comprises the following steps: (1)pretreating a carrier; (2) introduction of a main active component: mixing the CaO carrier particles with a Fe(NO3)3.9H2O solution, stirring and immersing, drying, calcining and grinding; (3) introduction of an auxiliary active component: mixing the sample prepared by the step (2) with a Ce(NO3)3.6H2O solution, stirring, immersing, drying, placing the obtained sample in a muffle furnace for calcining, placing the calcined sample in a dryer to cool to room temperature, grinding, then mixing the obtained powder with a Zr(NO3)4.5H2O solution, stirring, immersing, drying, then placing the sample in a muffle furnace for calcining, then placing the calcined sample in a dryer to cool to room temperature, and then grinding; and (4) shaping of the catalyst.

Description

[0001] This application is a divisional application of a Chinese invention patent application with an application date of August 20, 2013, an application number of 2013103635011, and a multifunctional iron-based catalyst for biomass pyrolysis gasification and its preparation method. technical field [0002] The invention relates to a catalyst and a preparation method thereof, in particular to a biomass pyrolysis gasification multifunctional iron-based catalyst and a preparation method thereof. Background technique [0003] With the gradual reduction of fossil energy and the increasingly serious environmental problems, the search and development of new energy sources has attracted great attention all over the world. Biomass resource is the only renewable carbon resource, which has attracted people's attention because of its abundant resources, renewable and zero carbon emissions. Biomass pyrolysis gasification technology is one of the ways to cleanly and efficiently utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10B57/06
Inventor 孙来芝张晓东陈雷司洪宇孟光范伊晓路
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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