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Method for preparing furan chemical by catalytic pyrolysis of biomass

A technology for catalytic pyrolysis and biomass, applied in chemical instruments and methods, physical/chemical process catalysts, biofuels, etc., can solve the problems of low product yield, complex process, poor selectivity, etc., and achieve high furfural selectivity, high Simple process, single product effect

Inactive Publication Date: 2009-07-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing furan chemicals by catalytic pyrolysis of biomass, which is simple and effective, belongs to the method of improving the singleness and high selectivity of chemical production, and overcomes the process Complexity, low product yield, poor selectivity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 400 grams of willow sawdust as raw material, roughly cut it to a particle size below 2 cm, and add 8 grams of FeCl to the raw material particles of willow sawdust by dry method 3 After fully mixing, dry it, and then put it in a drying box to remove free water for later use; put the above materials directly into a quartz reactor, cover the ground cover, put the reactor into a microwave pyrolyzer, and then use an inert gas Drive away the air in the quartz reactor and the condensing pipeline; turn on the microwave (frequency is 2.45GHz), adjust the microwave power to 500w, keep the material temperature in the reactor at 500°C, under normal pressure and anoxic conditions, and then pyrolyze it. Enter inert gas such as nitrogen, the flow rate is 0.1m 3 / h, which plays the role of isolating air and carrier gas. The pyrolysis time is 15 minutes. The pyrolysis steam is condensed into a pyrolysis liquid after passing through two-stage 0°C water condensers. After the pyrolysi...

Embodiment 2

[0027] Take 450 grams of wheat straw as raw material, roughly cut it to a particle size below 2 cm, add 16 grams of AlCl 3 After mixing evenly, dry it at a microwave frequency of 2.45GHz, a microwave power of 400w, a pyrolysis final temperature of 450°C, and a nitrogen flow rate of 0.1m 3 / h, pyrolysis under normal pressure for 15 minutes, after the pyrolysis steam was cooled by two stages of 25° C. water, the liquid product was collected (the rest of the operation steps not described in detail are the same as in Example 1, the same below). The liquid product yield is 55.7%, furfural accounts for 63.4% of liquid organic components, and furyl alcohol accounts for 4.4%.

Embodiment 3

[0029] Take 300 grams of rice straw as raw material, roughly cut it to a particle size below 2cm, add 30 grams of ZnCl 2 After mixing evenly, dry it at a microwave frequency of 2.45GHz, a microwave power of 900w, a pyrolysis final temperature of 650°C, and a nitrogen flow rate of 0.2m 3 / h, pyrolysis under normal pressure for 10 minutes, the pyrolysis steam is cooled by two stages of 5°C water, and the liquid product is collected. The liquid product yield is 53.8%, furfural accounts for 61.1% of liquid organic components, and furyl alcohol accounts for 5.3%.

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Abstract

The invention relates to a method for preparing a liquid product rich in furfural and other furan chemicals by biomass. The method comprises the following steps: a catalyst is added into particles of a biomass raw material by a dry method or a wet method; the mixture is dried after the mixture is sufficiently mixed; the mixture is placed in a drying cabinet to remove free moisture for standby; the obtained material is filled into a quartz reactor, the reactor is placed in a microwave purolyzer, and oxygen in the quartz reactor and a condenser pipeline is driven off by inert gas; and microwave is started, power of the microwave is adjusted to pyrolyze the material in the quartz reactor, and the pyrolyzed steam is condensed into a pyrolysis liquid through a two stage water-cooled condenser. The method has the advantages that the yield of the pyrolysis liquid reaches over 50 percent (dry base), the furfural in a liquid product is over 60 percent of the content of organic compositions, which is far higher than the content of quickly pyrolzed furfural by the biomass (below 10 percent), and the time of a pyrolyzing reaction is obviously shortened. The method has the characteristics of simple process, single product, high furfural selectivity, and the like.

Description

technical field [0001] The invention relates to a preparation method of biomass conversion chemicals, that is, a method for preparing liquid products rich in furan chemicals such as furfural by using biomass. Background technique [0002] The current energy and environmental issues have become the focus of global attention. The unrestrained exploitation and utilization of fossil resources not only causes serious pollution to the environment on which human beings live, but also gradually depletes their resources. Therefore, it is imperative to seek alternative resources. Biomass, as a renewable energy that can be converted into liquid fuels and chemicals, basically does not contain sulfur and has little impact on the environment. The conversion of biomass into high value-added chemicals can not only obtain high-value chemicals, but also reduce the use of fossil energy. [0003] Direct rapid pyrolysis of biomass can obtain high-yield liquid products, but the product compositi...

Claims

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Application Information

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IPC IPC(8): C07D307/48C10B53/02B01J27/128B01J27/125B01J27/138
CPCY02E50/14Y02E50/10
Inventor 杨昌炎赵非洲丁一刚王存文吴元欣
Owner WUHAN INSTITUTE OF TECHNOLOGY
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