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Catalytic heat carrier for pyrolysis of carbonaceous material and preparation method thereof

A technology for pyrolysis of carbon and carrier, which is applied in the methods of granulating raw materials, materials for heat exchange, chemical instruments and methods, etc. Carriers, waste of energy, etc.

Inactive Publication Date: 2013-03-06
NAT INST OF CLEAN AND LOW CARBON ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of using hot carrier gas as the heat transfer medium mainly has the following two disadvantages: First, it is difficult to apply to large-scale pyrolysis furnaces, because the gaseous heat transfer medium is difficult to enter in the case of a large amount of feed. The material provides effective and uniform heating to reach its operating temperature; secondly, the hot carrier gas needs to be preheated to a high temperature in advance to reach or exceed the operating temperature, but it is not recycled or recovered, which greatly increases the operating cost a lot of energy wasted
[0008] However, it is a pity that so far, despite many attempts, no catalytic heat carrier for pyrolysis of carbonaceous materials with the above functions has been found.

Method used

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  • Catalytic heat carrier for pyrolysis of carbonaceous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The combustion bottom ash of the coal direct liquefaction residue and the waste coal direct liquefaction catalyst were mixed at a weight mixing ratio of 2:1. The chemical composition of the mixture was shown in Table 1. The mixture was wet ground to a particle size of about 30 μm.

[0101] Table 1

[0102] SiO 2

[0103] Mix 10kg of the above mixture with 18.5kg of a mixture of alumina sol and silica sol with a weight mixing ratio of 1:3 to prepare a slurry. The pH of the sol mixture is 2 to 3, and the obtained mixture is continuously and uniformly stirred. Slurry for 30 minutes, and then spray-dry the obtained homogeneous mixture slurry to prepare catalytic heat carrier porous particles with a particle size ranging from 50 to 200 μm. The spray-dried catalytic heat carrier particles were sintered at 700°C for 4 hours. The specific surface area of ​​the sintered catalytic heat carrier porous particles is 250-400m 2 / g, the pore size ranges from 2 to 20nm. ...

Embodiment 2

[0125] The waste fluidized catalytic cracking catalyst, the combustion bottom ash of the direct coal liquefaction residue and the waste coal direct liquefaction catalyst are mixed in a weight mixing ratio of 1:2:1, wherein the embodiment 2 uses the coal direct liquefaction residue used in the embodiment 1 Combustion bottom ash and waste coal direct liquefaction catalyst, some element compositions of the spent fluid catalytic cracking catalyst are shown in Table 7 below, and the mixture was wet ground to a particle size of about 30 μm.

[0126] Table 7

[0127] Ni

V

Fe

Cu

C

0.3-0.7％

0.3-1.2％

1.1-1.6％

0.1-0.5％

0.3-1.0％

[0128] Mix 10kg of the above mixture with 19kg of a mixture of alumina sol and silica sol with a weight mixing ratio of 1:3 to prepare a slurry. The pH value of the sol mixture is about 2 to 3, and the above slurry is stirred continuously and uniformly After 30 minutes, the homogeneous mixture...

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Abstract

The invention relates to catalytic heat carrier for pyrolysis of carbonaceous material and a preparation method thereof. The catalytic heat carrier is made from transition metal, oxide and / or sulfide of transition metal, clay mineral used as molecular sieve, ore containing transition metal, waste or tailings and / or mixture of them, preferably residual burning bottom ash by direct liquefaction of coal, waste fluidization catalysis cracking catalyst, catalyst by direct liquefaction of waste coal, red mud and / or mixture of them, or more preferably mixture of residual burning bottom ash by direct liquefaction of coal and / or waste fluidization catalysis cracking catalyst and / or catalyst by direct liquefaction of waste coal. The catalytic heat carrier circulates between a pyrolytic reactor and a reheater of the catalytic heat carrier to provide heat for the pyrolytic reactor, and accordingly quick feeding and effective heating of carbonaceous material are achieved and catalytic activity, and oxygen and / or nitrogen transfer capacity of the catalytic heat carrier for various reactions in pyrolysis are given to play to obtain solid, gas and liquid products. A way of pyrolysis of carbonaceous material is performed by an environment-friendly and low-cost method.

Description

technical field [0001] The invention relates to a catalytic heat carrier for pyrolyzing carbonaceous materials and a preparation method thereof, more specifically, to a catalytic heat carrier used as a catalyst, heat carrier and oxygen / hydrogen transfer material in the pyrolysis process of carbonaceous materials Multifunctional catalytic heat carrier for producing gas, liquid and solid products. Background technique [0002] Pyrolysis of carbonaceous materials is a process in which carbonaceous materials are mainly thermally decomposed in a pyrolysis furnace, and pyrolysis is an endothermic reaction, so it is necessary to provide a heat transfer medium for rapid and effective heating of the pyrolysis feed. Usually, a heat carrier gas such as hydrogen or nitrogen is used as a heat transfer medium. At this time, the heat carrier gas is preheated to a high temperature before being fed into the pyrolysis section or pyrolysis furnace to ensure the operating temperature of the pyr...

Claims

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Application Information

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IPC IPC(8): B01J2/00B01J23/78B01J23/847C09K5/16
Inventor 刘科郭小汾
Owner NAT INST OF CLEAN AND LOW CARBON ENERGY
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