Comprehensive utilization method of lignocellulose biomass

Abstract

The invention discloses a comprehensive utilization method of lignocellulose biomass. According to the method, a lignocellulose raw material is pretreated by p-toluenesulfonic acid to realize efficient conversion and utilization of each component after component separation; a lignin-containing biomass-based hydrogel is prepared from a fiber material containing residual lignin by virtue of a dissolution-regeneration method; the hemicellulose and the cellulose degradation product can be converted into furfural through a hydrolysis method; and lignin is prepared into a lignin depolymerization product which can be used as an aviation fuel precursor through hydrogenization depolymerization. According to the comprehensive utilization method of the lignocellulose biomass, all components of lignocellulose can be utilized in a high-valued mode, the loss is small in the high-valued utilization process, the yield is high, the preparation process is simple, and harmful pollutants cannot be discharged into air.

Description

technical field [0001] The invention relates to the technical field of reuse of agricultural and forestry biomass, in particular to a method for comprehensive utilization of lignocellulosic biomass. Background technique [0002] Biomass resources are the most abundant natural renewable resources on earth, including trees, straw and wood waste. The effective use of biomass resources can not only reduce human dependence on petroleum, but also reduce the emission of greenhouse gases such as carbon dioxide. Therefore, biomass resources have broad application prospects in replacing petrochemical energy. However, due to the complex structure of lignocellulose, biotransformation requires multiple pretreatments and catalytic synergies of various enzymes, resulting in high cost of bioconversion of lignocellulosic materials. If the three major components in lignocellulosic materials are graded and refined, and converted into high value-added products such as fuels and chemical materi...

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Problems solved by technology

For example, CN104774876A discloses a method for comprehensive utilization of lignocellulosic biomass. In this method, the lignocellulosic material is first cooked by the sulfite method. After solid-liquid separation, the liquid is saccharified and fermented to produce ethanol, propanol and butanol, etc. , the solid is obtained through sulfonation of sulfonated lignin, but this method needs to adjust the pH twice, the operation is complicated, and the pretreatment consumes high energy and time; CN110093172A discloses a comprehensive utilization method of biomass materials, the method Disclosed in the following content: Under supercritical conditions, use composite metal catalysts and microwave assistance to convert biomass materials into activated carbon, hydrogen-rich gas and liquid fuels, but this process needs to be carried out under high temperature and pressure, high energy consumption, and The use of organic solvents in the treatment process will have adverse effects on the environment; CN108315354A discloses a method for preparing biochar from straw saccharification residues and the application of the prepared biochar. In the method, straw particles are treated by cellulase saccharification and then passed The saccharification residue is collected by centrifugation and sieving, and lignin is obtained after drying, and then the obtained lignin is used to prepare biochar, but the utilization rate of lignocellulosic components is low in this method, and cellulose and hemicellulose are not fully utilized

It can be seen from the above that the current utilization of biomass resources only focuses on the conversion and utilization of one or two components or consumes a lot of energy and time. The use of energy-intensive biomass resources is very important

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