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Pyrolysis, carbonization and catalysis integrated method

A technology of pyrolysis carbonization and catalytic chamber, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of low energy utilization, high energy consumption, and high cost, and achieve fuel cost savings , Low preparation cost, easy replacement

Active Publication Date: 2020-06-02
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an integrated method of pyrolysis, carbonization and catalysis to solve the problems of high energy consumption, high cost and low energy utilization rate in the existing methods

Method used

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  • Pyrolysis, carbonization and catalysis integrated method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Using biomass such as corn stalks as raw materials, the stalks are crushed into small particles with a particle size of 1-5 cm, dried at 70°C-120°C until the moisture content is 10%-15%, and granulated by crushing and drying machinery. Processed into particles smaller than 5cm; the processed raw materials are fed and evenly distributed under sealed conditions, and pyrolysis reaction is carried out in an environment of 720°C, and then thermal Decompose oil-gas mixture and biochar. The pyrolysis oil-gas mixture is subjected to a tar catalysis process in the catalytic chamber integrated with the pyrolysis furnace. The biochar catalyst in the catalytic chamber catalyzes the cracking of tar particles in the oil-gas mixture into small molecular gases such as methane and hydrogen at a temperature above 690°C. The catalytic chamber is equipped with a pressure gauge and a pressure alarm device, which has an alarm function for excessive pressure. At the same time, after the carb...

Embodiment 2

[0036] The difference from Example 1 is that the pyrolysis reaction temperature is 700°C, the heat preservation carbonization temperature is 600°C, and the tar catalytic cracking temperature is 800°C.

Embodiment 3

[0038] The difference from Example 1 is that the pyrolysis reaction temperature is 630°C, the heat preservation carbonization temperature is 530°C, and the tar catalytic cracking temperature is 690°C.

[0039] The pyrolysis and carbonization temperature of the system of the present invention is controlled at 630-720°C, and the tar content in the original pyrolysis gas produced by carbonization is 15%-20%. The nickel-based biochar catalyst prepared by the present invention has a nickel loading of 1.5%. Tar is at 750-850°C, the reaction time reaches 20min, and the concentration is 1.06g / m 3 The carbon conversion rate can reach 78.5%, and the cracking rate can reach more than 80% in a short time.

[0040] The present invention can keep the biomass at the optimal pyrolysis temperature of 600°C, and at the same time maintain the catalytic temperature of the biochar above 700°C, play the role of tar removal, and realize the optimum pyrolysis of biomass, tar removal and catalyst reg...

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Abstract

The invention discloses a pyrolysis, carbonization and catalysis integrated method, and belongs to the field of biomass pyrolysis. The invention aims to solve the problems of high energy consumption,high cost and low energy utilization rate of an existing method. The pyrolysis, carbonization and catalysis integrated method comprises five processes of sealed feeding, uniform distribution, continuous pyrolysis, tar catalysis and flue gas recycling. Biomass is used as a raw material, feeding and uniform distribution of the processed raw material are realized under a sealed condition, a pyrolyticreaction is carried out, and a pyrolytic oil-gas mixture and biochar are obtained after two main processes of pyrolytic carbonization and carbon-gas separation in sequence; a pyrolysis oil-gas mixture is subjected to a tar catalytic process in a catalytic chamber integrated with a pyrolysis furnace, part of cured biochar is prepared into a new catalyst for being continuously used, and the processes are subjected to stepped heat supply by utilizing waste heat of reflux flue gas. The nickel-based biochar catalyst is high in activity, good in stability, low in preparation cost, environmentally friendly and efficient.

Description

technical field [0001] The invention belongs to the field of biomass pyrolysis, and in particular relates to a biomass pyrolysis carbonization catalytic system. Background technique [0002] Usually biomass pyrolysis and catalyst regeneration are carried out separately, and there is a problem of high energy consumption. Both the carbonization furnace and the catalytic chamber of the pyrolysis equipment need an external heat source for heating. At present, the carbonization furnace and the tar catalytic chamber of the pyrolysis equipment are generally separated in structure, and the pyrolysis and catalysis processes are carried out separately, and the external heat sources of the carbonization furnace and the catalytic chamber are separated and independently supplied with heat. The external heat source of the catalytic chamber is mostly heated by electric heating equipment, or the pyrolysis raw gas is heated by a preheating furnace before entering the catalytic chamber. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B57/00C10B57/12
CPCC10B53/00C10B57/00C10B57/12C10B53/02C10B47/30C10B47/44B01J21/18B01J23/755C10B57/18B01J6/008B01J35/1004B01J37/009B01J37/0207B01J37/04B01J37/06B01J37/08C10B57/10
Inventor 姚宗路郝晓文赵立欣贾吉秀丛宏斌霍丽丽
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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