Abstract
Different enthalpic, entropic and packing effects occurring in zeolites are reviewed which can be used to control elution order in the gas and liquid phase separation of linear and branched alkanes. Ordering effects in ZSM-5 can be used to separate long linear alkanes, even when only different by one carbon. Inverse selectivity occurs with stronger adsorption of the shorter chain, and azeotropes can be formed. Preferential adsorption of branched over linear alkanes (inverse selectivity) was for the first time experimentally determined for some mono- and multi-branched isomers in MCM-22 (rotational entropy effect) and at low coverage in SAPO-5 (enthalpy effect). These selectivity reversals identified both in gas and liquid phase can potentially be useful in more efficient hydrocarbon processes such as the production of clean gasoline with high octane number.
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.
