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.