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Method and system for preparing syngas from biomass through microwave pyrolysis

A biomass and synthesis gas technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, direct heating and dry distillation, etc., can solve the problem of low microwave absorption efficiency, increased energy consumption and gas consumption, process The problem of low economy is to achieve the effect of effective coupling and integration, recycling, and continuity.

Active Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst used in this patent uses attapulgite as a carrier, which has the problem of low microwave absorption efficiency, and the oxidation coke suppression treatment cannot solve the structural deactivation problem of the catalyst caused by the microwave field.
In addition, in order to increase the H 2 / CO, consumes a lot of water vapor, increases energy consumption and gas consumption, and the process economy is not high

Method used

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  • Method and system for preparing syngas from biomass through microwave pyrolysis
  • Method and system for preparing syngas from biomass through microwave pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Mix 1 part of biomass semi-coke (carbon content 85%, hydrogen content 2%, oxygen content 11.9%, nitrogen content 1.1%, degree of graphitization 78%) and 5 parts 2.1% ammonia solution, then modify at 25 ℃ 6h, then according to the molar ratio of nickel oxide and ammonia in water as 1:9, add nickel oxide into the above reaction system and continue to stir until no solid dissolves. / min, 1℃ / min at 60~70℃, 0.5℃ / min at 70~80℃, 0.25℃ / min at 80~90℃) to 90℃ and keep for 6h. During this heating process, a precipitate gradually formed, and then the precipitate was separated and washed until the solution was neutral, dried at 80°C for 4 hours, and roasted at 300°C for 6 hours under a nitrogen atmosphere to obtain a biomass oil reforming catalyst BOWR-1, wherein The mass percentage of ammoniated biological semi-coke is 94.87% (carbon content 84.1%, hydrogen content 2.2%, oxygen content 10.5%, nitrogen content 3.2%, of which pyridine nitrogen accounts for 1.05%, pyrrole nitrogen acc...

Embodiment 2

[0060] Mix 1 part of bio-semi-coke (carbon content 74.2%, hydrogen content 3.9%, oxygen content 19.9%, nitrogen content 2%, degree of graphitization 45%) and 2 parts 10% ammonia solution, then modify and react at 30°C for 2 hours , and then according to the molar ratio of nickel oxide to ammonia water 1:7, nickel oxide was added to the above reaction system and continued to stir until no solid was dissolved. 70°C at 1°C / min, 70~80°C at 0.5°C / min, 80~90°C at 0.25°C / min) to 90°C and keep for 6 hours. During this heating process, a precipitate is gradually formed, and then the precipitate is separated and washed until the solution is neutral, dried at 150°C for 1 hour, and roasted at 500°C for 2 hours under a nitrogen atmosphere to obtain a biomass oil reforming catalyst BOWR-2, wherein The mass percentage of ammoniated biological semi-coke is 87.45% (carbon content 72%, hydrogen content 2.4%, oxygen content 19.5%, nitrogen content 6.1%, of which pyridine nitrogen accounts for 1....

Embodiment 3

[0062] Mix 1 part of bio-semi-coke (carbon content 74.2%, hydrogen content 3.9%, oxygen content 19.9%, nitrogen content 2%, degree of graphitization 45%) and 2 parts 20% ammonia solution, then modify and react at 50°C for 4 hours , and then according to the molar ratio of nickel oxide to ammonia water as 1:9, nickel oxide was added to the above reaction system and continued to stir until no solid was dissolved. min, 60~70°C at 1°C / min, 70~80°C at 0.5°C / min, 80~90°C at 0.25°C / min) to 90°C and keep for 6h. During this heating process, a precipitate is gradually formed, and then the precipitate is separated and washed until the solution is neutral, dried at 150°C for 1 hour, and roasted at 500°C for 2 hours under a nitrogen atmosphere to obtain a biomass oil reforming catalyst BOWR-3, wherein The mass percentage of ammoniated biological semi-coke is 80.47% (carbon content 72.5%, hydrogen content 4.4%, oxygen content 15.2%, nitrogen content 7.9%, of which pyridine nitrogen account...

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Abstract

The invention discloses a method and system for preparing syngas from biomass through microwave pyrolysis. The method includes a microwave pyrolysis reaction process taking biomass as a raw material,a microwave gasification reaction process, and a catalyst recycling regeneration process. An adopted catalyst is a catalyst including ammoniated modified biomass semi-coke and a nickel oxide component. The catalyst recycling regeneration process includes an oxidation treatment process and an amination treatment process. The system of the present invention includes a feed assembly, a microwave pyrolysis assembly, a microwave gasification assembly, and a catalyst regeneration assembly. The catalyst regeneration assembly includes an oxidation processor and an ammoniation processor, and the ammoniation processor is connected to the microwave gasification assembly. The catalyst used in the method and system of the present invention is modified by ammoniating modification, and catalytic orientedgasification can increase the adsorption amount of acidic compositions on the surface of a basic catalyst, reduce the acidity of the system, suppress side reactions of coke, and increase the yield ofthe syngas. The system of the present invention can effectively couple and integrate products and energy during the production process and realize a continuous and streamlined process.

Description

technical field [0001] The invention relates to a microwave-assisted biomass pyrolysis synthesis gas production method and system. Background technique [0002] Biomass energy is rich in resources and is a renewable and environmentally friendly green energy source. Using biomass to produce synthetic gas through pyrolysis and gasification is a promising energy development method. However, the immaturity of biomass pyrolysis gasification technology, low gasification efficiency, the purity of biomass synthesis gas and tar impurities directly restrict the development of biomass synthesis gas bioconversion technology. Therefore, the development of a new type of low-consumption and high-efficiency biomass rapid gasification synthesis gas technology, and the systematic study of key issues such as high tar and low conversion of synthesis gas raw materials from the root cause will solve the bottleneck problem in the promotion of biotechnology and lead the future biomass conversion te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/00C10B49/02B01J31/28B01J31/40
CPCB01J31/28B01J31/403B01J38/04B01J38/12C10B49/02C10B53/04C10B57/00
Inventor 王鑫张彪赵丽萍蔡海乐张长安乔凯刘继华宋永一
Owner CHINA PETROLEUM & CHEM CORP
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