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Recovery of vinyl chloride from by‐streams of polyvinyl chloride production by TPSA in a multitubular adsorber
AIChE Journal ( IF 3.5 ) Pub Date : 2020-01-05 , DOI: 10.1002/aic.16899
Paulo Carmo 1 , Ana M. Ribeiro 1 , Alírio E. Rodrigues 1 , Alexandre Ferreira 1
Affiliation  

This work aims at developing an efficient and feasible adsorption‐based separation process for the separation of vinyl chloride and nitrogen, on activated carbon, by employing a multitubular packed bed geometry, with adsorbent material inside the tubes. Using this geometry, a 2‐dimensional mathematical model of a temperature pressure swing adsorption process was used to developed a 6‐step three multitubular adsorbers system capable of separating and purifying an industrial scale gas stream of a 40:60% (v/v) vinyl chloride/nitrogen mixture into a 95% (v/v) vinyl chloride stream and a nitrogen stream with a vinyl chloride limit concentration of 8 ppm (w/w). The process reported energy consumption of 4.88 × 106 J/kgVCM and recovery capacity of 24.35 kgVCM/(m3unit h). The multitubular geometry enabled the use of lower adsorbent loads, shorter cycle times, and lower regeneration temperatures. An equivalent 1‐dimensional model has also shown to satisfactorily estimate the performance of the current equipment.

中文翻译:

在多管吸附器中通过TPSA从聚氯乙烯生产的副产物中回收氯乙烯

这项工作旨在开发一种有效且可行的基于吸附的分离方法,通过采用多管填充床几何结构并在管内吸附材料,在活性炭上分离氯乙烯和氮。使用这种几何形状,使用温度变压吸附过程的二维数学模型来开发六步三管多管吸附器系统,该系统能够分离和纯化40:60%(v / v)的工业规模气流氯乙烯/氮气混合物分成95%(v / v)的氯乙烯物流和氮氯乙烯极限浓度为8 ppm(w / w)的氮气物流。该工艺报告的能耗为4.88×10 6  J / kg VCM,回收能力为24.35 kg VCM /(m3个单位小时)。多管几何结构可以使用较低的吸附剂负荷,较短的循环时间和较低的再生温度。等效的一维模型还可以令人满意地估算当前设备的性能。
更新日期:2020-04-21
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