Abstract
Bilayered HZSM-5 zeolite coatings with additional nonzeolite pores were synthesized on the inner surface of stainless steel tubes by a secondary growth method with the addition of ethanol into the synthesis batch. The as-synthesized coatings were characterized by scanning electron microscopy and gas permeation, indicating that additional nonzeolitic pores were formed in the presence of ethanol. A remarkable greater than 1000-fold improvement in N2 permeation was observed. Catalytic cracking of supercritical n-dodecane (500 °C, 4 MPa) over a series of bilayered HZSM-5 coatings showed that the HZSM-5 coatings with additional nonzeolite pores also exhibit a remarkable catalytic activity improvement by ca. 150% and that the amount of nonzeolite porosity may play a determining role in the enhancement of the catalytic performance. According to cracking products and the permeation test, the performance enhancement may be attributed to the effective access of reactant to the acid sites in the zeolite pores due to...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
