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真空 ›› 2020, Vol. 57 ›› Issue (6): 69-74.doi: 10.13385/j.cnki.vacuum.2020.06.15

• 真空获得与设备 • 上一篇    下一篇

活性炭低温低压吸附等温线试验研究

孙鲁尧1, 陈光奇2   

  1. 1.沈阳恒进真空科技有限公司,辽宁 沈阳 110168;
    2.张家港富瑞特种装备股份有限公司,江苏 张家港 215637
  • 收稿日期:2020-06-29 出版日期:2020-11-25 发布日期:2020-11-30
  • 通讯作者: 陈光奇,高级工程师。
  • 作者简介:孙鲁尧（1989-）,男,山东省烟台市人,硕士,工程师。

Experimental Study on Adsorption Isotherms of Activated Carbon at Low Temperature and Pressure

SUN Lu-yao1, CHEN Guang-qi2   

  1. 1.Shenyang Hengjin Vacuum Technology Co., Ltd., Shenyang 110168, China;
    2.Zhangjiagang Furui Special Equipment Co., Ltd., Zhangjiagang 215637, China
  • Received:2020-06-29 Online:2020-11-25 Published:2020-11-30

摘要： 介绍了低温低压下活性炭吸附等温线的试验原理、装置、样品制备、试验步骤及数据处理。对DX-30煤质颗粒状、ZX-15无烟煤粉圆柱状及CH-1椰子壳粒状活性炭做了液氮温区低压下CO2、空气、N2、Ar、H2、He的吸附等温线试验。试验表明：活性炭对CO2、空气、N2、Ar的吸附等温线表现为朗缪尔（Langmuir）I型等温线;H2表现为弗伦德利希（Freundlich）线性等温线;He表现为下凹的Ⅲ型等温线。吸附能力比较：吸附平衡压力10-2Pa时,活性炭对CO2的吸附量最大为10cm3/g~120cm3/g;对N2、空气、Ar次之为0.2cm3/g~1.5cm3/g;对H2较弱,为1.5×10-3cm3/g~2.3×10-3cm3/g;对He极弱,吸附平衡压力10-1Pa时小于3×10-5cm3/g。液氮温度下三种活性炭的综合吸附能力：DX-30型稍强、ZX-15型其次、CH-1型稍弱。文中的吸附等温线可供低温吸附泵及低温容器设计参考。

关键词: 低温容器, 低温吸附泵, 低温吸附剂, 活性炭, 吸附等温线。

Abstract: The test principle,equipment,sample preparation, test method and data processing of activated carbon adsorption isotherm at low temperature and low pressure were introduced. The adsorption isotherms of CO2, air, N2, Ar, H2 and He by DX-30 briquette, ZX-15 columnar anthracite and CH-1 coconut shell particles were tested at low pressure of liquid nitrogen temperature.The results show that the adsorption isotherms of activated carbon for CO2, air, N2 and Ar are Langmuir I isotherms, Freundlich isotherms for H2 and concave type Ⅲ isotherms for He. Comparison of adsorption capacity：when the adsorption equilibrium pressure is 10-2Pa, the maximum adsorption capacity of activated carbon for CO2 is (10~120)cm3/g;for N2, air and Ar, the next is (0.2~1.5)cm3/g;for H2, it is only (1.5×10-3~2.3×10-3)cm3/g;for He, it is very weak, and the adsorption equilibrium pressure is less than 3×10-5cm3/g at 10-1Pa.The comprehensive adsorption capacity of the three activated carbons at liquid nitrogen temperature is：DX-30 type is slightly stronger, ZX-15 type is next, CH-1 type is slightly weaker. The adsorption isotherm in this paper can be used as a reference for the design of low temperature adsorption pump and cryogenic vessel.

Key words: cryogenic vessels, cryogenic adsorption pumps, cryogenic adsorbent, activated carbon, adsorption isotherms

中图分类号: 

  • O658.6+2
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