Synthesis, characterization and reactivity of high hydrothermally stable Cu-SAPO-34 materials prepared by “one-pot” processes

A Cu-SAPO-34 material with very high activity for selective catalytic reduction (SCR) of NOx and hydrothermal stability has been synthesized following a sequential rationalized design. By using specific combinations of organic structure directing agents (OSDAs) and gel compositions in a “one-pot” method, it was possible to control Cu occupancy, framework Si distribution, and to maximize the yield of solids. The amount of Cu2+ is maximized and remains stable even after steaming at 750°C for 13h.