响应面法制备枇杷核微孔炭及其选择性吸附研究

以新鲜枇杷核为原料制备了枇杷核微孔炭（LMC），以 LMC 对盐酸四环素的吸附率为指标，通过响应面法优化制备工艺，进一步研究了 LMC 的孔结构和选择性吸附性能。结果表明：最优制备工艺为活化时间 192 min、活化温度 565 ℃、活化升温速率 21.5 ℃/min、炭化温度 632 ℃；该工艺所得枇杷核微孔炭对盐酸四环素的吸附率高达 95.25%，其 BET 比表面积为 1 275 m2/g，微孔表面积为 1 219 m2/g，总孔容为 0.535 4 cm3/g，微孔孔容为0.473 cm3/g；较高的比表面积和高比例的微孔含量赋予其优异的分子尺寸选择性吸附性能。

Preparation and Optimization of Loquat Seeds Based on Microporous Carbon via Response Surface Method and Study on Its Selective

Loquat seeds based microporous carbon (LMC) was prepared using fresh loquat seeds as the raw material.  Employing the adsorption rate of tetracycline hydrochloride on LMC as the investigation index, the preparation technology of LMC was optimized via a response surface method. The pore structure and selective adsorption were further investigated. The results showed that, the optimal preparation parameter was obtained as the following, the activation time 191.56 min, activation temperature 565 ℃, activation heating rate 21.5 ℃/min, and the carbonization temperature 632 ℃. The adsorption rate of tetracycline hydrochloride on the as-obtained LMC was up to 95.25%. The BET specific surface area, micropore’s surface area, total pore volume, and micropore’s pore volume of the as-obtained LMC was 1 275 m2/g, 1 219 m2/g, 0.535 4 cm3/g, and 0.473 cm3/g, respectively. Benefiting from the high specific surface area and high proportions of microporous structure, it exhibited good molecular size selective adsorption properties.