Ting Shi’s scientific contributions

In this research, an in-situ microwave hydrothermal synthesis strategy for chromium-substituted aluminophosphate (CrAlPO-5) zeolite coating on aluminum foil was introduced. The influences of seed coating, molar ratio of Cr2O3/P2O5, crystallization temperature and time on the performance of adsorbent coating were investigated systematically. The crystal phase, composition and the morphology of the as-synthesized CrAlPO-5 adsorbents were characterized by X-ray diffractometer, Fourier infrared spectrometer and Scanning electron microscopy, and its adsorption and desorption performances were evaluated by water vapor adsorption and temperature programmed desorption. Results showed that CrAlPO-5 zeolite coating could be conveniently synthesized on aluminum foil by in-situ microwave hydrothermal method with the molar ratio of Cr2O3/P2O5 of 0.01–0.06, the temperature of 180–210 °C and within 15–40min. Compared with the CrAlPO-5 adsorbent prepared without seed coating, the one synthesized by seed-inducing method had a more complete crystal phase, higher relative crystallinity and larger specific surface area, and displayed a smaller and more perfect hexagonal prism crystal morphology as well as a thicker coating (100 μm). Moreover, it exhibited slightly higher saturation adsorption capacity. All results indicate that the novel synthesis technique of CrAlPO-5 zeolite coating on aluminum foil provides a guidance for the fabrication of desiccant coating on heat exchanger in ACH system.