【摘要】 以桉木为原料，采用磷化-碳化两步法制备了碳基固体酸催化剂，通过扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、N₂物理吸附-脱附仪（BET）、傅立叶变换红外光谱（FT-IR）和程序升温脱附（NH₃-TPD）等仪器分析方法，对桉木碳基固体酸的结构特征及物化性质进行了表征。结果表明，随着浸渍磷酸溶液的浓度及碳化温度的增加，S_BET和V_total增大；当磷酸溶液浓度为3%、碳化温度为600℃时，S_BET为386.9 m²·g^-1,V_total为4.164cm³·g^-1,D_pore为4.30nm，总酸度达到0.51mmol·g^-1，强酸位点酸量占比为45.2%，中强酸和弱酸酸量的占比分别为33.7%和21.1%。将EC3-600用于催化无水乙醇制乙烯，当反应温度为400℃、重时空速为3.5h^-1时，乙醇的转化率及乙烯的选择性分别为71.59%和99.53%，具有良好的催化性能。更多还原

【Abstract】 The carbon-based solid acid catalysts were prepared with eucalyptus by a two-step phosphorylation-carbonization method.The structural characteristics and physicochemical properties of carbon based solid acids from eucalyptus were characterized by SEM, XPS, BET, FT-IR and NH₃-TPD. As a result, at 3% of phosphoric acid concentration, 600℃ of carbonization, the S_BET,V_Total and D_pore of catalyst were 386.9m²/g, 4.164cm³/g, 4.30nm, respectively, and the total acidity was 0.51mmol/g. The percentage of the strong, medium, weak acid within total acid were 45.2%, 33.7%, 21.1 %, respectively. The conversion of ethanol and the selectivity of ethylene reached 71.59% and 99.53% at 400℃ , WHSV of 3.5/h and atmospheric pressure with EC3-600, respectively.更多还原