化学吸附仪温度滞后分析及检测条件优化  

Temperature hysteresis analysis and detection conditions optimization of chemisorption analyzer

作　　者：彭胜 丁肖肖 贾伟艺 Peng Sheng;Ding Xiaoxiao;Jia Weiyi(Coal Chemical R&D Center of Kailuan Group,Tangshan 063611,China)

机构地区：[1]开滦煤化工研发中心,唐山063611

出　　处：《分析仪器》2020年第2期82-85,共4页Analytical Instrumentation

摘　　要：在使用化学吸附仪进行催化剂表征时,由于管路死体积的存在,导致图谱出现温度滞后和轴向扩散现象。本实验以氨气程序升温脱附实验(即NH3-TPD)为例,采用折半查找法和流量控制,从技术角度提高温度准确性,使温度绝对误差减小到±10℃以内,并优化图谱结果。When using a chemisorption analyzer for catalyst characterization,the existence of dead volume of the pipeline will lead to temperature hysteresis and axial diffusion in the atlas.Taking the temperature programmed desorption of ammonia(NH3-TPD)as an example,the half-interval search method and flow control are adopted to improve the temperature accuracy,which can reduce the absolute error of temperature to ±10℃,and optimize the results of the atlas.

关 键 词：化学吸附 NH3-TPD 温度滞后 折半查找法 

分 类 号：O657[理学—分析化学] O647.3[理学—化学]