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Directed catalytic cracking device and method

A catalytic cracking and process technology, which is applied in the petroleum industry, biofuels, coke ovens, etc., can solve the problems of high energy consumption costs, overall process complexity, and low process production efficiency, achieving small equipment investment and flexible sampling methods , significant incremental effect

Pending Publication Date: 2018-11-30
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] At present, increasing the pyrolysis tar yield of raw materials such as coal and biomass and directional regulation and control of tar products from raw materials pyrolysis such as coal and biomass are generally carried out in two independent systems, which leads to the complexity of the overall process and energy consumption. Problems such as high consumption cost, low product utilization rate, and low process production efficiency
A device and method for directional regulation and control of tar products while improving the yield of pyrolysis tar from raw materials such as coal and biomass by using a fixed bed at both ends. rarely reported

Method used

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Experimental program
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Embodiment 1

[0083] The low-rank coal from a chemical plant in northern Shaanxi was used as raw material, and its industrial analysis and elemental analysis are shown in Table 1. Experiment coal 5g, reaction gas is N 2 , the catalyst activation temperature is 600°C, the catalyst used to activate the reaction gas is HY (also known as HY molecular sieve catalyst), and the amount of HY is 2g; the temperature of coal pyrolysis is 800°C, and the reaction pressure is: 0.1MPa; the catalytic cracking catalyst is al 2 o 3 , Al 2 o 3 The dosage is 2g, the temperature of the catalytic cracking section is 600°C; the catalyst used for directional regulation and control of tar products is Mo / Ni / HZSM-5, the dosage of Mo / Ni / HZSM-5 is 2g, the temperature of the directional regulation section is 500°C, and the reaction pressure is: 0.1 MPa. The yield of coal pyrolysis tar is 5.63%. The composition distribution of various products of coal is shown in Table 2. It can be seen from Table 2 that the total ...

Embodiment 2

[0090] The low-rank coal from a chemical plant in northern Shaanxi was used as raw material, and its industrial analysis and elemental analysis are shown in Table 1. Experiment coal 5g, reaction gas is CH 4 , the catalyst activation temperature is 600°C, the catalyst used to activate the reaction gas is HY, and the amount of HY is 2g; the coal pyrolysis temperature is 800°C, and the reaction pressure is: 0.1MPa; the catalytic cracking catalyst is Al 2 o 3 , Al 2 o 3 The dosage is 2g, the temperature of the catalytic cracking section is 600°C; the catalyst used for directional regulation and control of tar products is Mo / Ni / HZSM-5, the dosage of Mo / Ni / HZSM-5 is 2g, the temperature of the directional regulation section is 500°C, and the reaction pressure is: 0.1 MPa. The yield of coal pyrolysis tar is 8.81%. The composition distribution of various products of coal is shown in Table 3. It can be seen from Table 3 that the total relative content of BTXN in the catalytic crack...

Embodiment 3

[0094] The low-rank coal from a chemical plant in northern Shaanxi was used as raw material, and its industrial analysis and elemental analysis are shown in Table 1. Experiment coal 5g, reaction solution is CH 3 OH, the catalyst activation temperature is 600°C, the catalyst used to activate the reaction gas is HY, the amount of HY is 2g; the coal pyrolysis temperature is 800°C, the reaction pressure is: 0.1MPa; the catalytic cracking catalyst is Al 2 o 3 , Al 2 o 3 The temperature of the catalytic cracking section is 600°C; the catalyst used for directional control of tar products is Mo / Ni / HZSM-5, the amount of Mo / Ni / HZSM-5 is 2g, the temperature of the directional control section is 500°C, and the reaction pressure is: 0.1 MPa. The yield of coal pyrolysis tar is 9.93%. The composition distribution of various products of coal is shown in Table 4. It can be seen from Table 4 that the total relative content of BTXN in the catalytic cracking products of coal after directiona...

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Abstract

The invention discloses a directed catalytic cracking device and method. A reaction atmosphere in a reaction tube of an upper stage furnace is laid to a catalyst bed through a first gas distributor toactivate reaction gas, the reaction atmosphere generates free radicals under the action of a catalyst, the free radicals contact with free radicals produced by pyrolysis of the raw materials in a rawmaterial bed, a gaseous product is laid to a catalyst A bed through a third gas distributor, the catalyst A bed catalytically cracks the gaseous product of pyrolysis, the catalytic cracking product is fed into a catalyst B bed and is subjected to type-selective catalysis, and the type-selective catalysis product is fed into a condensation device and is condensed to form liquid tar. The device combines pyrolysis of coal, biomass and the like, a tar yield increasing process and orientation control of a product distribution process, simplifies the overall processes, is environmentally friendly,reduces the energy consumption cost, improves the production efficiency, is suitable for large-scale production and is suitable for industrial promotion and application.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and relates to a directional catalytic cracking device and a process. Background technique [0002] Coal pyrolysis is a key step in the conversion and utilization of coal. Coal combustion, gasification, liquefaction and other processes all occur or undergo pyrolysis. However, the yield of coal tar obtained by traditional coal pyrolysis is low, and the content of heavy components is high. Moreover, heavy components have the characteristics of high boiling point, high viscosity, and difficult separation. The distribution of various products in the target product is messy and the relative content Therefore, various products cannot be effectively enriched. [0003] Biomass is mainly composed of cellulose, hemicellulose, lignin, etc. Pyrolysis is also the most basic process in the thermochemical processing of biomass, which is the synthesis of its liquefaction, gasification and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B53/00C10G1/00C10B53/02
CPCC10B53/00C10B53/02C10B53/04C10G1/00C10G2300/1011Y02E50/10
Inventor 孙鸣刘永琦马明明李亚波么秋香代成义郝青青马晓迅
Owner NORTHWEST UNIV(CN)
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