Abstract
Mo/HMCM-22 is one of the candidate catalysts for methane dehydroaromatization (MDA) reaction. However, serious coke deposition would deactivate the catalyst, resulting in a rapid decrease of aromatics yield. Here, we adjusted the acidity of MCM-22 zeolite by doping boron into the framework. Boron species replace some of framework aluminum and prompt aluminum to locate in sinusoidal channel. It optimizes the ratio of strong/weak Brønsted acid, as well as enhances the interaction between molybdenum and HMCM-22 to facilitate the dispersion of molybdenum species. After 10 h of MDA reaction, the yield of aromatics over Mo/H[B]MCM-22 (SBR 30) is 3.5 times higher than that of Mo/H[B]MCM-22 (SBR 5). It decreases by only 4.8 % in comparison to the initial yield. Meanwhile, Mo/H[B]MCM-22 (SBR 30) shows significantly better resistance to coke deposition. Therefore, the established structure–activity relationships provide valuable insights for future research on the modification of zeolite acidity in methane dehydroaromatization reaction.
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.
