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Regeneration system and method for molecular sieve based catalyst applied to biomass splitting decomposition arene preparing

A regeneration system and catalyst technology, applied in the field of molecular sieve catalyst regeneration system, can solve the problems of active component loss of activity, crystal structure damage, catalyst deactivation, etc., and achieve the effects of simple operation, reduced running loss and high efficiency

Inactive Publication Date: 2017-04-05
北京禾生新源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The higher the regeneration temperature of the deactivated catalyst, the faster the burning speed, but the temperature should not be too high, otherwise the carrier or active components of the catalyst will appear semi-melting, sintering, grain expansion, crystal structure destruction and loss of active components due to temperature increase Such conditions cause the activity to gradually decline, causing the catalyst to undergo solid-state transformation. The solid-state transformation is an irreversible process, and the catalyst will be permanently deactivated.

Method used

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  • Regeneration system and method for molecular sieve based catalyst applied to biomass splitting decomposition arene preparing
  • Regeneration system and method for molecular sieve based catalyst applied to biomass splitting decomposition arene preparing

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Embodiment 1

[0048] Such as Figure 1~2 As shown, a regeneration system for deactivated molecular sieve catalysts applied in biomass cracking to aromatics, the regeneration system includes a combustion chamber 1, a dense phase coking chamber 2, a dilute phase separation chamber 6 and a cyclone separator;

[0049] The combustion chamber 1 is provided with a fuel inlet 13 for adding fuel, an air inlet for delivering air to the combustion chamber 1, and a main air outlet 14 for delivering heat flow to the dense-phase coking chamber 2; the heat flow here can also be called It is hot air or hot air, which is the air flow heated by the combustion chamber 1. The air inlet includes a primary air inlet 11 and a secondary air inlet 12, that is, the combustion chamber 1 is a double-air duct combustion chamber, and the combustion chamber 1 is used to heat the main air when the regeneration system is started, so as to raise the temperature of the entire regeneration system to the operating temperature;...

Embodiment 2

[0066] The heat receiver 4 in embodiment 1 can also be other forms, as long as the system temperature can be reduced, as, the dense-phase charring chamber 2 is double-walled, and the water in the heat receiver 4 is in the heat receiver 4 The heat is circulated between the double wall and the double wall to achieve the effect of cooling.

Embodiment 3

[0068] The reaction of biomass cracking to produce aromatics: the reactants get reaction products under the action of molecular sieve catalysts. After the reaction, due to the deposition of residual carbon or coke-like substances on the surface and pores, the activity of the catalyst is reduced or deactivated.

[0069] The target aromatics are mainly benzene, toluene, xylene and naphthalene, etc. If necessary, further separation can be carried out later.

[0070]The molecular sieve catalyst can be molecular sieve catalysts such as H-Y, HZSM-5, Hmordenite, silicon and silicon-aluminum.

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Abstract

The invention relates to a regeneration system and method for a molecular sieve based catalyst applied to biomass splitting decomposition arene preparing. The regeneration system comprises a combustion chamber, a dense phase scorching chamber, an umbrella cap type separator, a dense phase separation chamber and a cyclone separator. According to the regeneration method, the combustion chamber is used for supplying heat needed for temperature rise of the system, a to-be-generated catalyst system is combusted in the dense phase scorching chamber, and a combustion product of the to-be-generated catalyst system is separated through the umbrella cap type separator, the dense phase separation chamber and the cyclone separator. The technology process of the regeneration system and the regeneration method is mature and reliable, the regeneration effect of deactivated catalysts and efficient separation of the deactivated catalysts and plant ash particles can be guaranteed, the running losses of the catalysts can be reduced, and the regeneration system and method can also adapt to different carbon residue carrying amounts and green coke amounts of to-be-generated catalysts due to different handling capacities of a reaction system.

Description

technical field [0001] The invention relates to the field of catalyst activation, in particular to a regeneration system and regeneration method for molecular sieve catalysts used in biomass cracking to produce aromatic hydrocarbons. Background technique [0002] During the reaction process, hydrocarbons will generate highly polymerized product-coke due to condensation and hydrogen transfer, which will settle on the surface of the catalyst and block its pores, reducing its activity and selectivity. In order to make the catalyst continue to be used, the regeneration method is used in the industrial device to burn off the deposited coke, so as to restore its activity and selectivity. [0003] The higher the regeneration temperature of the deactivated catalyst, the faster the burning speed, but the temperature should not be too high, otherwise the carrier or active components of the catalyst will appear semi-melting, sintering, grain expansion, crystal structure destruction and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/90C10G1/00
CPCB01J29/90B01J38/02C10G1/00C10G2300/1011C10G2300/708C10G2400/30
Inventor 殷辉路新龙
Owner 北京禾生新源科技有限公司