3D Printed Zeolite Monoliths

About

Structured adsorbents, especially in the form of monolithic contactors, offer an excellent gas−solid contacting strategy for the development of practical and scalable CO2 capture technologies. This technology allows the fabrication of three-dimensional (3D)-printed 13X and 5A zeolite monoliths with novel structures and their use in CO2 removal from air. The physical and structural properties of these printed monoliths compare with their powder counterparts. Results indicate that 3D-printed monoliths with zeolite loadings as high as 90wt % exhibit adsorption uptake that is comparable to that of powder sorbents. The adsorption capacities of 5A and 13X monoliths were found to be 1.59 and 1.60 mmol/g, respectively, using 5000 ppm (0.5%) CO2 in nitrogen at room temperature. The dynamic CO2/N2 breakthrough experiments show relatively fast dynamics for monolithic structures. In addition, the printed zeolite monoliths show reasonably good mechanical stability that can eventually prevent attrition and dusting issues commonly encountered in traditional pellets and beads packing systems. The 3D printing technique offers an alternative, cost-effective, and facile approach to fabricate structured adsorbents with tunable structural, chemical, and mechanical properties for use in gas separation processes.