市售0号柴油对甲苯气体的吸收特性研究

以甲苯为吸收对象,市售0号柴油为吸收剂,采用静态气液平衡与动态吸收模拟相结合的方法,研究0号柴油对甲苯的吸收特性。气液平衡实验表明,在一定的浓度和温度范围内,0号柴油与甲苯的气液平衡符合亨利定律。动态吸收模拟实验表明,废气中甲苯浓度对0号柴油的吸收效果产生显著影响,随着废气中甲苯浓度的增大,0号柴油的吸收效率和吸收速率增大,吸收饱和时间减少。计算发现,当动态吸收达到饱和时,0号柴油对甲苯的吸收量远低于理论吸收量,但随着废气中甲苯浓度的增加,两者的差距在缩小,这可能与动态条件下气液相接触时间较短有关。实验发现,在吸收过程中,0号柴油中有少量的轻组分逸出,会产生二次污染的问题,可以通过与吸附等其他过程结合来消除。

STUDY ON ABSORPTION CHARACTERISTICS OF COMMERCIAL 0# DIESEL PROCESSING TOLUENE GAS

This research studied the absorption process，using a common organic absorbent 0# diesel oil to treat toluene-loaded vent gas，in terms of absorption possibility and mass transfer． A detailed comparison and evaluation of static gas liquid equilibrium and dynamic absorption simulation was undertook． The results showed in certain concentration and temperature range，gas-liquid equilibrium of 0# diesel oil and toluene was accordance with Henry' s law． In the dynamic absorption simulation experiment， treatment rate and efficiency for the toluene rose with the increase of the concentration of toluene． Calculation showed that the uptake of toluene was far lower than the theory and the gap of them became narrow． In the process of absorption，small amounts of 0# diesel oil escaped，and caused the problem of secondary pollution． This problem could be eliminated by other process such as adsorption 0# diesel oil suited the requirements as an absorbent to treat industrial polluted air loaded with toluene．