相变石蜡吸附精制工艺的正交试验的研究.pdfVIP

相变石蜡吸附精制工艺的正交试验研究 张会平，鄢 瑛 （华南理工大学化学化工学院,广东 广州 510640 ） 摘要：本文采用活性炭作为吸附剂进行相变石蜡吸附精制工艺正交试验研究，利用紫外分光光度计测定相 变石蜡的脱色率，研究了活性炭用量、吸附温度、吸附时间对脱色率的影响，确定了最佳的吸附精制工艺。 并采用自动吸附仪、气相色谱分析仪和差示扫描量热仪分别测定了活性炭的孔结构和比表面积、相变石蜡 2 的正构烷烃分布和热性能。实验结果表明：活性炭的BET 总比表面积为1718.49m /g ，BJH 平均孔径为 3 3.1629nm ，微孔体积为0.3198m /g。最优吸附工艺为活性炭用量8%、吸附温度120℃、吸附时间60min ，脱 色率达到86.57%，正构烷烃含量为89.89%，提高了4.38% ，相变潜热为164.9J/g，提高了12.33%。 关键词：相变石蜡; 活性炭; 脱色率; 正交试验 中图分类号：TQ050.4 文献标识码：A Orthogonal Test Analysis for Adsorption Refining of Phase Change Paraffin Zhang Huiping, Yan Ying (School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China) Abstract: Phase change paraffin was prepared by adsorption refining with activated carbon as absorbent. The effects of adsorption temperature, absorption time and amount of absorbents on decoloration rate of phase change paraffin were investigated. Orthogonal test was used to optimize the adsorption refining process of phase change paraffin. Specific surface areas and pore size distributions of activated carbon were measured by using adsorption apparatus. Latent heat storage capacity was measured by using DSC. Carbon number distribution of phase change paraffin was analyzed by using gas chromatography. The results showed that the BET specific surface area of 2 activated carbon was 1718.49 m /g, BJH average pore size was 3.1629 nm and micropore volume 3 was 0.3198 m /g. Phase change paraffin prepared by adsorption temperature of 120℃, adsorption time of