Abstract
Internal hydrogen bonding, especially in the bedding planes, plays an important role in determining the swelling characteristics in variously ranked coal. To further examine the swelling behavior using the EPR spin probe technique developed in this lab, known O-alkylation procedures have been used to derivatize the hydroxyl groups in APCS coal samples. Reduction of the extent of hydrogen bonding altered the amount of polar spin probe retention. Furthermore, an increase in coal swelling by nonpolar solvents such as toluene has been observed. By swelling O-alkylated APCS coals with nonplanar as well as polar solvents, using spin probes VII and VIII has yielded the spin probe retention as a function of rank when internal hydrogen bonding due to hydroxyl groups is removed in the APCS coals Beulah-Zap, Illinois No. 6, Upper Freeport and Pittsburgh No. 8.
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.
