Biomass pyrolysis gasification multifunctional iron-based catalyst and preparation method thereof

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, Active metal deactivation, low tar cracking rate and other problems, to achieve good storage / release of oxygen capacity, enhanced interaction, and improve the effect of anti-carbon deposition

Active Publication Date: 2013-11-20
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.
[0005] 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 easily deactivated 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

[0019] A method for preparing a biomass pyrolysis gasification multifunctional iron-based catalyst, comprising the steps of:

[0020] ①Carrier pretreatment: put 26g CaO in the muffle furnace, at 800 oC was calcined for 4h, and then ground and sieved to prepare 100-mesh CaO carrier particles.

[0021] 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.

[0022] 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 pla...

Embodiment 2

[0028] 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%.

[0029] 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

[0031] 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%.

[0032] 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

A biomass pyrolysis gasification multifunctional iron-based catalyst and a preparation method thereof are disclosed. The preparation method is characterized by comprising the following steps: (1) carrier pretreatment: placing CaO in a muffle furnace for calcining, then grinding and screening to prepare CaO carrier particles; (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: performing shaping on the obtained catalyst, and screening to obtain the catalyst finished product.

Description

technical field [0001] 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 [0002] 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 utilize biomass energy. This process can obtain H 2 , CO-based syngas, which can then be converted into liquid fuels and chemicals. [0003] In the process of biomass pyrolysis gasification, mainly H 2 , CO, CO 2 、CH 4 The main gas, while inevitably producing tar. Among them, CO in the ...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10K1/32
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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