Abstract
Abstract The formation of carbonaceous compounds «coke from propene and isobutene on 5A zeolites with different degrees of calcium exchange (55, 75 and 85%) and their effects on the capacity for nitrogen adsorption were investigated in a microbalance system. The operating conditions of coking were as follows: 150 and 350°C, pressure of alkene of 97kPa, 0.085g of zeolite and operating time from 2 min to 24h. The higher the temperature and the degree of exchange, the faster the coke formation. Coke constituted mainly by oligomers at 150°C and of aromatics (alkylbenzenes and alkylnaphthalenes) at 350°C are trapped in the α cages. The significant decrease in the pore volume accessible to nitrogen due to coke showed that whatever their origin, coke molecules are preferentially located in the outer part of the crystallites.
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.
