Dual-bed configuration with eco-friendly NaY synthesis promotes isoparaffin formation from syngas

Simplicity and environmental friendliness are essential for zeolite synthesis. Here, we report that NaY (NaY-R) zeolite is accomplished over an ambient pressure environment and adopt rice hush ash as silicon source. A floated sealant on zeolite gel may cleverly creates a quasi-sealed environment for reducing water evaporation. Importantly, the catalytic performances of Co loading NaY-R (Co/NaY-R) on a dual-bed catalytic system with ZSM-5 or Beta zeolite are comparable to those of the corresponding catalytic system formed by commercial NaY zeolite (NaY-C). Meanwhile, dual-bed catalytic systems show significantly enhanced selectivity for gasoline ranged hydrocarbons (C_5-11) and isoparaffins compared to the pristine Co/NaY. These results indicate the proposed synthetic protocol can achieve green, safe, and energy-saving synthesis of NaY zeolite, which enriches the insight into designing novel zeolite synthetic route.