Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia; CO(2) Research Centre (CO(2)RES), Institute Contaminant Management for Oil and Gas, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia.
Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia; CO(2) Research Centre (CO(2)RES), Institute Contaminant Management for Oil and Gas, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia.
Chemosphere. 2022 Nov;306:135529. doi: 10.1016/j.chemosphere.2022.135529. Epub 2022 Jun 30.
Presently, composite membranes emerged as a promising approach to overcome the limitations of polymeric and inorganic membranes particularly in acid gas separation. In the present work, composites membranes were fabricated by combining hierarchical T-Type (h-zeolite T) zeolite and PEBA-1657 at different filler composition that ranging from 5 wt% - 30 wt% for the CO/CH separation. The physicochemical properties of the resultant inorganic filler and membranes were investigated by using Brunauer-Emmett- Teller (BET), field emission scanning electron microscopy (FESEM), Fourier Transform infra-red (FTIR), x-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). FESEM and EDX analysis revealed that the formation of voids and agglomeration of particles is pronounced as the fillers loading was increased up to 30 wt%. The single gas permeation test demonstrated that amalgamation of h-zeolite T particles into PEBA-1657 has resulted in the improvement of CO permeability up to 122% and CO/CH selectivity up to 31%. Hybrid membrane encapsulated with 25 wt% of h-zeolite T displayed a maximum separation efficiency with the highest CO permeability of 164.83 Barrer and CO/CH selectivity of 19.37. However, further increment of fillers composition up to 30 wt% resulted in a sharp reduction of COCH selectivity to 15.80 due to the particles sedimentation and agglomeration. Overall, the favorable gas transport behavior of PEBA-1657/h-zeolite T composite membrane indicates its promising prospect for CO/CH separation especially in biogas and natural gas purification application. Future research efforts are directed on the optimization of the fabrication parameters and performance investigation at different operating condition to further enhance the CO separation and extend its operability under various environment.
目前，复合膜作为一种很有前途的方法出现，特别是在酸气分离方面，它克服了聚合物和无机膜的局限性。在本工作中，通过将分级 T 型（h-zeolite T）沸石和 PEBA-1657 以不同的填充成分（5wt%-30wt%）组合，制备了用于 CO/CH 分离的复合膜。通过使用 Brunauer-Emmett-Teller（BET）、场发射扫描电子显微镜（FESEM）、傅里叶变换红外（FTIR）、X 射线衍射（XRD）、热重分析（TGA）和差示扫描量热法（DSC）研究了所得无机填料和膜的物理化学性质。FESEM 和 EDX 分析表明，随着填充量的增加，空隙的形成和颗粒的团聚变得明显，达到 30wt%。单气体渗透测试表明，h-zeolite T 颗粒与 PEBA-1657 的结合导致 CO 渗透率提高了 122%，CO/CH 选择性提高了 31%。封装有 25wt%h-zeolite T 的混合膜显示出最高的分离效率，CO 渗透率最高为 164.83 Barrer，CO/CH 选择性为 19.37。然而，填充成分进一步增加到 30wt%，导致 CO/CH 选择性急剧下降到 15.80，这是由于颗粒沉降和团聚所致。总体而言，PEBA-1657/h-zeolite T 复合膜的有利气体传输行为表明其在 CO/CH 分离方面具有广阔的前景，特别是在沼气和天然气净化应用中。未来的研究工作将集中在优化制备参数和不同操作条件下的性能研究，以进一步提高 CO 分离效率，并在各种环境下扩展其可操作性。
