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To control CO 2 emission from industries, membrane technology is preferred over conventional technologies due to its numerous advantages including reliability, operational simplicity, and low capital cost. Hollow-fiber mixed-matrix membranes (HFMMMs) exhibit great potential for CO 2 separation. Various inorganic fillers were incorporated into different types of polymeric materials for fabrication of HFMMMs. This review focuses on the performance and issues of HFMMMS based on various materials for CO 2 /CH 4 and CO 2 /N 2 separation. Major features are reflected in the following three aspects: comprehensive study on the performance of HFMMMs for CO 2 /N 2 and CO 2 /CH 4 separation, issues with the fabrication of HFMMMs in CO 2 /N 2 and CO 2 /CH 4 separation, and prediction of transport models for HFMMMs in gas separation.

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