In order to enhance the valorization of corncob, corncob-based solid acid catalysts were prepared via the method of partial carbonization followed by sulfonation. The prepared acid catalysts were either derived from raw corncob (hemicellulose, cellulose, and lignin), or its residues after different pretreatments, i.e., furfural residue (cellulose and lignin) and hydrolysis residue (humins and lignin), to investigate the components’ effect on the performance of solid acid. These catalysts were characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), nitrogen adsorption/desorption analysis, scanning electron microscope (SEM), elemental analysis, and acid–base titration. The analysis results suggested that the solid acid (Catalyst-3) derived from the hydrolysis residue had the best performance, with a BET surface area of 338.23 m² g⁻¹ and total acid densities of 6.43 mmol g⁻¹. This results indicated –SO₃H groups were loaded onto the catalyst successfully. The catalytic activity was tested by cellulose hydrolysis in lithium bromide trihydrate solution (LBTH) system. The yield of glucose was as high as 80.1% at the temperature of 110 °C for 10 h. Moreover, the prepared solid acid had the advantages of easy separation, mild reaction, and producing less by-products compared with traditional liquid acids. This work provides a promising strategy for corncob waste utilization and cellulose efficient hydrolysis, which is of great significance for biomass valorization and conversion.

为了提高玉米芯的价值，采用部分碳化后磺化的方法制备了玉米芯基固体酸催化剂。制备的酸催化剂要么来源于生玉米芯（半纤维素、纤维素和木质素），要么来源于不同预处理后的残留物，即糠醛残留物（纤维素和木质素）和水解残留物（腐殖质和木质素），以研究组分的作用关于固体酸的性能。通过热重分析（TGA）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、氮吸附/脱附分析、扫描电子显微镜（SEM）、元素分析和酸碱滴定对这些催化剂进行了表征。²  g ^{-1和6.43 mmol g -1}的总酸密度。该结果表明–SO ₃ H 基团成功负载到催化剂上。在溴化锂三水合物溶液（LBTH）体系中通过纤维素水解来测试催化活性。在110°C 10 h的温度下，葡萄糖的产率高达80.1%。此外，所制备的固体酸与传统的液体酸相比，具有易分离、反应温和、副产物少等优点。该工作为玉米芯废料利用和纤维素高效水解提供了一种有前景的策略，对生物质的增值和转化具有重要意义。