Solid acid pretreatment method for biomass material

Abstract

The invention relates to a solid acid pretreatment method for a biomass material, and belongs to the field of biological energy. The solid acid pretreatment method comprises the following steps: collecting corn stalks, straw, corncobs or straw cores, drying at the temperature of 105 DEG C, and smashing into 40 to 80 meshes; and adding 10 to 25 voluminal times of solid acid, wherein the concentration of solid acid is 0.5% to 3%, the time lasts for 20 to 120 min, and the temperature is 90 to 140 DEG C. The method has the beneficial effects that, when sulfamic acid and sodium chloride are dissolved into water, a part of the solution is formed into hydrochloric acid, and the remaining part of sulfamic acid is maintained. The pretreatment effect of solid acid is similar to that of a conventional acidic reagent, but hemicellulose can be removed under a relatively mild condition through solid acid pretreatment, and fewer toxic substances such as furfural are generated than normal acid pretreatment. The obtained biomass material has smaller inhibiting effect for cellulose, and the pretreated residue is washed without the need of much water, so that the waste of water resource and the pollution to the environment are avoided; and the condition in the invention is milder than a conventional pretreatment process, the cost is lower, and the requirement for equipment and persons is also relatively low.

Description

technical field [0001] The invention belongs to the field of biological energy, in particular to a method for pretreating biomass raw materials with solid acid. Background technique [0002] Biomass materials are the most abundant, green, renewable lignocellulosic raw materials in the world. Jilin Province is a large grain-growing province in my country, with a corn planting area of ​​40 million mu, a corn output of more than 250 million tons, a rice planting area of ​​over 12 million mu, and an annual output of more than 60 million tons of usable agricultural waste. Agricultural waste is a green and cheap lignocellulosic material that can be developed and comprehensively utilized. At present, a large amount of agricultural waste has nowhere to be used, and more than 50% of it is burned or piled up and left to rot, which wastes precious Lignocellulosic resources, and pollute the environment. The comprehensive utilization of agricultural waste has attracted great attention ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for solid acid pretreatment of biomass raw materials to solve the problem that the current acid and alkali pretreatment process requires high temperature and high pressure conditions, which have strong damage to people and equipment, and cause great pollution to the environment. In addition, The biomass residue after pretreatment contains furfural and other substances harmful to cellulase and microorganisms; although the conditions of microbial pretreatment are mild, the treatment time is long and the effect is not obvious

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