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Adsorption Process Intensification through Structured Packing: A Modeling Study Using Zeolite 13X and a Mixture of Propylene and Propane in Hollow-Fiber and Packed Beds
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02189 Trisha Sen 1 , Yoshiaki Kawajiri 1 , Matthew J. Realff 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-21 , DOI: 10.1021/acs.iecr.8b02189 Trisha Sen 1 , Yoshiaki Kawajiri 1 , Matthew J. Realff 1
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There is scope to intensify the traditional adsorptive separation process which relies on packing a bed with adsorbent pellets. The hollow-fiber bed is one of the several structured configurations that have been proposed to overcome the high pressure drop and inefficient heat transfer of this random packing arrangement. While heat and mass transfer and pressure drop losses are improved in the hollow-fiber bed, the adsorbent packing density is reduced leading to a potential loss of capacity. In this computational study, we performed preliminary parametric comparisons of these bed properties, for equivalent cases in the packed bed and the hollow-fiber bed. Optimized five step single bed cycles for the separation of propylene and propane on zeolite 13X were also studied. For the same recovery and purity, the hollow-fiber bed was found to have a productivity that was five times higher than the packed bed. The hollow-fiber bed also showed higher productivity, when parameters such as the desorption pressure and the ratio of the purge to feed velocity were varied in both beds.
中文翻译：
通过结构填充增强吸附过程：在中空纤维床和填充床中使用沸石13X和丙烯与丙烷的混合物进行建模研究
有必要加强传统的吸附分离工艺，该工艺依赖于用吸附剂颗粒填充床。中空纤维床是已经提出来克服这种无规填料装置的高压降和传热效率低的几种结构形式之一。尽管中空纤维床中的传热和传质以及压降损失得到改善，但吸附剂的堆积密度却降低了，从而导致了潜在的容量损失。在此计算研究中，我们对填充床和中空纤维床的等效情况进行了这些床特性的初步参数比较。还研究了用于在13X沸石上分离丙烯和丙烷的优化五步单床循环。为了获得相同的回收率和纯度，发现中空纤维床的生产率是填充床的五倍。当在两个床中改变诸如解吸压力和吹扫与进料速度的比率之类的参数时，中空纤维床也显示出更高的生产率。
更新日期：2019-02-07
中文翻译：
通过结构填充增强吸附过程：在中空纤维床和填充床中使用沸石13X和丙烯与丙烷的混合物进行建模研究
有必要加强传统的吸附分离工艺，该工艺依赖于用吸附剂颗粒填充床。中空纤维床是已经提出来克服这种无规填料装置的高压降和传热效率低的几种结构形式之一。尽管中空纤维床中的传热和传质以及压降损失得到改善，但吸附剂的堆积密度却降低了，从而导致了潜在的容量损失。在此计算研究中，我们对填充床和中空纤维床的等效情况进行了这些床特性的初步参数比较。还研究了用于在13X沸石上分离丙烯和丙烷的优化五步单床循环。为了获得相同的回收率和纯度，发现中空纤维床的生产率是填充床的五倍。当在两个床中改变诸如解吸压力和吹扫与进料速度的比率之类的参数时，中空纤维床也显示出更高的生产率。
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