Abstract
The influence of the pelletizing pressure on the frequency of the O-H stretching vibration at 3640 cm −1 has been studied up to 7000 kp/cm 2 for CaY and NH 4-Y zeolites by means of internal reflection and transmission techniques. No influence of the pressure was observed concerning the frequency of the O-H stretching vibration. The comparison of internal reflection with transmission spectra of X and Y zeolite powders containing Na +, NH 4 4 or Ca 2+ cations revealed no difference in the frequency of the O-H stretching vibrations. The different intensities of the normalized band at 3740 cm −1 in internal reflection and transmission spectra of a NH 4-X zeolite with 0.4 and 1.9 μm particle size, respectively, support the assignment of this band to terminal OH groups.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.