CO₂ gas absorption is important in fuel purification and carbon capture. By incorporating a porous membrane with a large surface area in membrane gas absorption (MGA) system, the CO₂ transfer between feed gas and liquid absorbent can be greatly improved. However, the absorption flux usually drops in the long-term operation due to membrane wetting by the common liquid absorbent, amine. Membrane wetting can lead to membrane swelling which induce the growth of mass transfer resistance. In this work, silicoaluminophosphate-34 (SAPO-34) zeolite was incorporated into polyvinylidene fluoride (PVDF) hollow fiber membrane to reduce flux decline caused by membrane swelling. The membrane porosity and pore size increased with increasing SAPO-34 loading. Nevertheless, significant changes in water contact angle or liquid entry pressure were not shown. PVDF hollow fiber membrane incorporated with 3 wt% of SAPO-34 showed slightly higher CO₂ absorption flux to PVDF hollow fiber membrane in MGA with distilled water as the absorbent. However, the CO₂ absorption flux of this PVDF/SAPO-34 membrane was greatly improved of about 140 % higher than the CO₂ absorption flux of the neat membrane when diethanolamine was used as the absorption. The CO₂ absorption flux of PVDF hollow fiber membrane dropped about 60 % after 96 hours. Although these membranes showed a similar water contact angle after being wetted by water or amine, they swelled differently. PVDF hollow fiber membrane swelled nearly 71.0 % after being wetted by amine, but only swelled about 2 % after being wetted by water. The incorporation of SAPO-34 into PVDF hollow fiber membrane reduced swelling by amine, down to 47.7 %. The swelling reduction could be a major cause of absorption improvement shown by PVDF/SAPO-34 hollow fiber membrane in MGA using diethanolamine.

吸收CO ₂气体在燃料净化和碳捕获中很重要。通过在膜气体吸收（MGA）系统中合并具有大表面积的多孔膜，可将CO ₂原料气和液体吸收剂之间的转移可以大大改善。但是，在长期操作中，吸收通量通常会由于普通液体吸收剂胺对膜的润湿而下降。膜润湿会导致膜膨胀，从而引起传质阻力的增长。在这项工作中，将硅铝磷酸盐-34（SAPO-34）沸石掺入聚偏二氟乙烯（PVDF）中空纤维膜中，以减少因膜溶胀而导致的通量下降。膜的孔隙率和孔径随SAPO-34负载的增加而增加。然而，未显示出水接触角或液体进入压力的显着变化。掺有3 wt％的SAPO-34的PVDF中空纤维膜的CO ₂略高以蒸馏水为吸收剂的MGA中PVDF中空纤维膜的吸收通量。然而，CO ₂此PVDF / SAPO-34膜的吸收通量大大的约140％提高比CO更高₂时的二乙醇胺被用作吸收净膜的吸收通量。一氧化碳₂96小时后，PVDF中空纤维膜的吸收通量下降约60％。尽管这些膜在被水或胺润湿后显示出相似的水接触角，但它们的溶胀度却有所不同。PVDF中空纤维膜在被胺润湿后膨胀了将近71.0％，但是在被水润湿后仅膨胀了约2％。将SAPO-34掺入PVDF中空纤维膜可减少胺的溶胀，降低至47.7％。溶胀的降低可能是使用二乙醇胺的MGA中PVDF / SAPO-34中空纤维膜显示出吸收改善的主要原因。