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Method for preparing aromatic hydrocarbons by catalyzing pyrolysis of wood-plastic composite waste through activated carbon

A kind of wood-plastic composite material and composite material technology, which is applied in the field of activated carbon catalytic pyrolysis of wood-plastic composite material waste to prepare aromatic hydrocarbons, can solve the problems of low yield of target products, easy coking of catalysts, etc., and achieve good environmental and economic benefits, Large specific surface area, the effect of promoting production

Pending Publication Date: 2020-04-28
SHANDONG UNIV OF TECH
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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 an activated carbon catalyzed wood-plastic composite material waste pyrolysis preparation for the problems existing in the pyrolysis process of molecular sieve catalyzed biomass and plastic solid waste, such as the catalyst is easy to coke and the target product yield is low. Aromatic compound method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using 100g of dry corn stalks as raw material, add 180g of phosphoric acid and 500mL of deionized water respectively, stir at room temperature for 24h, then place the mixture in a forced air drying oven at 105°C and dry to constant weight; put the activated material in Put it into a muffle furnace, raise the temperature from room temperature to 600°C at a rate of 5°C / min under an inert atmosphere, and carbonize at a constant temperature for 0.5h, and obtain 42g of activated carbon after cooling.

[0021] Take 6g of the above-mentioned activated carbon as a catalyst, and take 3g of wood-plastic composite material as a raw material, wherein the mass ratio of poplar wood to polypropylene in the wood-plastic composite material is 1:1. , heating rate greater than 10°C / s, and nitrogen flow rate of 100mL / min under the conditions of pyrolysis for 10min, the yield of liquid product was 52%, and the content of aromatics was 64% by gas chromatography analysis.

Embodiment 2

[0023] Using 5.5g of activated carbon prepared in Example 1 as a catalyst, taking 3g of wood-plastic composite material as a raw material, wherein the mass ratio of poplar wood and polypropylene in the wood-plastic composite material is 4:6, and the two are respectively put into a fixed bed for reaction In the reactor, it was pyrolyzed for 15 minutes under the conditions of 550°C, heating rate greater than 10°C / s, and nitrogen flow rate of 100mL / min. The yield of liquid product was 54%, and the content of aromatics was 68% by gas chromatography analysis.

Embodiment 3

[0025] Using 50g of dried corncob as raw material, add 80g of phosphoric acid and 300mL of deionized water respectively, stir at room temperature for 24h, then place the mixed solution in a blast drying oven at 105°C and dry to constant weight; put the activated material in Put it into a muffle furnace, raise the temperature from room temperature to 650°C at a rate of 10°C / min under an inert atmosphere, and carbonize at a constant temperature for 1 hour, and obtain 18g of activated carbon after cooling.

[0026] Get 7.5g of above-mentioned activated carbon as catalyst, get 3g wood-plastic composite material as raw material, wherein the mass ratio of pine wood and low-density polyethylene in wood-plastic composite material is 3:7, put the two into fixed-bed reactor respectively, in Under the conditions of 525°C, heating rate greater than 10°C / s, and nitrogen flow rate of 100mL / min, it was pyrolyzed for 20 minutes, and the yield of liquid product was 59%, and the content of aroma...

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Abstract

The invention belongs to the field of biomass energy and solid waste resource utilization, and particularly relates to a method for preparing aromatic hydrocarbons by catalyzing pyrolysis of wood-plastic composite waste through activated carbon. According to the method, wood-plastic composite waste is used as a raw material, the activated carbon is used as a catalyst, and the activated carbon is prepared from biomass through a phosphoric acid activation method. The raw material and the catalyst are respectively put into a fixed bed reactor, catalytic pyrolysis in an inert gas atmosphere is performed, and pyrolysis gas is condensed to obtain a liquid product rich in aromatic hydrocarbons. The disclosed method provides a new way for resource utilization of the wood-plastic composite materialwaste, and meanwhile, the cheap and readily available biomass activated carbon is used as the catalyst, so that good environmental benefits and economic benefits can be generated.

Description

technical field [0001] The invention belongs to the field of biomass energy and solid waste resource utilization, and in particular relates to a method for preparing aromatic hydrocarbons by catalyzing and pyrolyzing wood-plastic composite material waste with activated carbon. Background technique [0002] Wood-plastic composite materials are environmentally friendly materials made of wood fiber materials in the form of fibers / powders as reinforcements or fillers, thermoplastic polymers (such as polyethylene, polypropylene, etc.) With the dual characteristics of wood and plastic, it has the characteristics of excellent mechanical properties, acid and alkali resistance, corrosion resistance, and easy processing. It has been widely used in construction materials, auto parts, industry and interior decoration and other fields. One of the characteristics and advantages of wood-plastic composites as materials is that they can be recycled and reproduced. However, after repeated rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/20C07C4/04C07C15/02
CPCB01J27/20C07C4/04C07C15/02
Inventor 林晓娜蔡红珍易维明李志合付鹏张东红任夏瑾张庆发
Owner SHANDONG UNIV OF TECH
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