SSZ-33: A promising material for use as a hydrocarbon trap

\SSZ-33 is tested for possible application as a hydrocarbon trap by investigating the temperature-programmed desorption behavior of toluene (used as a probe molecule) and the results are compared to those obtained with zeolites beta, Y, mordenite, and ZSM-5. SSZ-33 shows higher adsorption capacity than the other zeolites at the conditions used here, and as well as better hydrothermal stability than zeolite beta and is therefore identified as a promising candidate for use as a hydrocarbon trap in cold-start emission control.