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A method for preparing bio-asphalt from lignocellulosic biomass hydrothermal charcoal

A technology of lignocellulose and bio-asphalt, which is applied in the field of environmental protection and comprehensive utilization of resources, can solve the problems of increasing dependence on petroleum resources, pollution and emissions, high prices of asphalt modifiers, and obstacles to resource conservation, achieving combination stability and improving high temperature The effect of high performance and great economic benefits

Active Publication Date: 2021-09-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing asphalt modifiers are expensive
Asphalt comes from petroleum, and a large amount of asphalt will also increase dependence on petroleum resources, generate more pollution and emissions, and hinder the process of building a resource-saving and environment-friendly society

Method used

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  • A method for preparing bio-asphalt from lignocellulosic biomass hydrothermal charcoal

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Effect test

Embodiment 1

[0025] After the corn stalks were dried and crushed into powder, 150 g and 2250 g of water were placed in a 3 L Hastelloy hydrothermal reaction kettle, and heated to 300° C., stirring continuously during the heating process. When the temperature of the mixture reaches the preset value of 300° C., keep the reaction for 1 hour and keep stirring. After the reaction was completed, the temperature was cooled down to room temperature, and the obtained product was separated by filtration. The obtained solid was filtered, dried at 80° C. for 12 hours to remove moisture, and hydrothermal charcoal was obtained. Combine the hydrothermal charcoal obtained above with Shell 70#PEN60 / 70 asphalt to prepare bio-asphalt. The specific steps are as follows: heat the base asphalt to 135°C and slowly pour in hydrothermal charcoal with a mass of 2% and 6% base asphalt respectively , and stirred rapidly for 15 minutes; continue to heat the mixture to 165 ° C, and under the action of a high-speed she...

Embodiment 2

[0030] After the wheat straw was dried and crushed into powder, 100g and 2000g of water were placed in a 3L Hastelloy hydrothermal reaction kettle, and heated to 330°C, stirring continuously during the heating process. When the temperature of the mixture reached the preset value of 330° C., the reaction was kept for 1 hour with constant stirring. After the reaction was completed, the temperature was cooled down to room temperature, and the obtained product was separated by filtration. The obtained solid was filtered, dried at 120° C. for 2 hours to remove moisture, and hydrothermal charcoal was obtained. Combine the hydrothermal charcoal obtained above with Shell 70#PEN60 / 70 asphalt to prepare bio-asphalt. The specific steps are as follows: heat the base asphalt to 130°C, slowly pour in hydrothermal charcoal with a mass of 10% base asphalt, and quickly Stir for 20 minutes; continue to heat the mixture to 170° C., and shear for 40 minutes under the action of a high-speed shear...

Embodiment 3

[0032] After drying Salix twigs, pulverize them into powder, take 200g and 2000g of water and place them in a 3L Hastelloy hydrothermal reaction kettle, and heat them to 250°C, stirring continuously during the heating process. When the temperature of the mixture reached the preset value of 250° C., the reaction was kept for 5 hours with constant stirring. After the reaction was completed, the temperature was cooled down to room temperature, and the obtained product was separated by filtration. The obtained solid was filtered, dried at 105° C. for 5 hours to remove moisture, and hydrothermal charcoal was obtained. Combine the hydrothermal charcoal obtained above with Shell 70#PEN60 / 70 asphalt to prepare bio-asphalt. The specific steps are as follows: heat the base asphalt to 140°C, slowly pour in hydrothermal charcoal with a mass of 4% base asphalt, and quickly Stir for 10 minutes; continue to heat the mixture to 160°C, and shear for 90 minutes under the action of a high-speed...

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Abstract

The invention provides a method for preparing bio-asphalt from lignocellulosic biomass hydrothermal charcoal. The invention uses lignocellulosic biomass as raw material, utilizes hydrothermal carbonization technology to prepare hydrothermal charcoal, and then combines it with matrix asphalt to prepare bio-asphalt. Asphalt technology. Biomass includes corn stover, rice straw or wheat straw etc. During the reaction process, the mixture of biomass and water is hydrothermally carbonized at a certain temperature and pressure to form hydrothermal charcoal, which is then combined with asphalt through high-speed shearing to prepare bio-asphalt. The process of the invention is simple, the hydrothermal carbon modifier is well combined with the asphalt, the high temperature performance of the asphalt is improved, and a novel and sustainable method is provided for the improvement of asphalt materials and the utilization of biomass resources.

Description

technical field [0001] The invention belongs to the fields of environmental protection and resource comprehensive utilization, and in particular relates to a method for preparing a bio-asphalt by hydrothermal carbonization of biomass to prepare an asphalt modifier. The present invention uses lignocellulosic biomass as a raw material to prepare an asphalt modifier process, specifically relates to hydrothermal carbonization of biomass at a certain temperature and pressure, and the formed hydrothermal charcoal is used as an asphalt modifier, and the hydrothermal charcoal is used as an asphalt modifier. Modifier mixed with asphalt method. The preparation process of this process is simple, the hydrothermal carbon modifier is well combined with the asphalt, and the high temperature performance of the asphalt is improved, which provides a new and sustainable method for the improvement of asphalt materials and the utilization of biomass resources. Background technique [0002] Asph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K3/04C01B32/05
CPCC08K3/04C08L2201/08C01B32/05C08L95/00
Inventor 张士成胡迟春冯坚强周楠
Owner FUDAN UNIV
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