采用浓硫酸磺化法制备磺化活性炭固体酸(AC-SO_3H),考察了反应温度和活性炭粒度对固体酸总酸量的影响.结果表明,反应温度越高、活性炭粒度越小,AC-SO_3H总酸量越大,最大酸量为0.878 mmol g~(-1).将该催化剂分别应用到小球藻和浒苔的乙醇热液化过程,对其催化性能进行考察.结果表明:AC-SO_3H的催化活性随其总酸量的增加而提高,最佳用量均为5%.在最优催化条件下,小球藻和浒苔液化的生物油产率分别提高了12.32%和10.33%;残渣收率分别降低了4.11%和4.49%;生物油热值分别提高了1.18和2.38 MJ kg~(-1).AC-SO_3H催化剂的加入促进了液化过程中的酯化和脱羧反应,并且可能改变了蛋白质的降解路径,抑制了美拉德反应,对生物油品质起到了改善作用. Sulfonated activated carbon solid acid (AC-SO_3H) was prepared by concentrated sulfuric acid sulfonation method. The effects of reaction temperature and activated carbon particle size on total acidity of solid acid were investigated. The results showed that the higher the reaction temperature, The maximum amount of total acid was 0.878 mmol g ~ (-1) .The catalyst was applied to the process of ethanol liquefaction of Chlorella and Enteromorpha, and the catalytic performance of the catalyst was investigated.The results showed that AC-SO_3H With the increase of total acidity, the best dosage was 5% .The yield of bio-oil liquefied by Chlorella and Enteromorpha increased by 12.32% and 10.33% respectively under the optimal catalytic conditions; the residue The yield of bio-oil increased by 1.18 and 2.38 MJ kg -1, respectively.The addition of AC-SO 3 H catalyst promoted the esterification and decarboxylation during liquefaction and may change The protein degradation pathway, inhibition of Maillard reaction, the quality of bio-oil has played an improving role.