Sentence examples for modifying zeolites are from inspiring English sources
The procedures for modifying zeolites are usually done by impregnation [18] and ion-exchange [17].
The nanopores and acid sites of modified zeolites were extensively investigated by N2 adsorption, XRD and in situ IR methods.
Changes in the properties of modified zeolites were investigated by several methods (29Si and 27Al MAS NMR, FTIR, SEM, XRD, and sorption techniques).
The XRD patterns of the modified zeolites were found to have changed and did not match with any of the patterns given in the JCPDS files.
The metal oxide content of the modified zeolites was determined by atomic adsorption spectroscopy (AAS) on a Perkin-Elmer AA 800 instrument.
The relative crystallinity of the modified zeolites was calculated by comparing the average intensities of the most intense peaks with that of the parent zeolite, HZSM-5, assuming 100%% of crystallinity for the starting material.
As the conversion profiles showed in Fig. 2, high conversion of methanol over modified zeolites was detected at the beginning of reaction, which was due to perfect crystal structure.
The SEM images of natural zeolite and acid modified zeolite are shown in Fig. 2.
X-ray diffraction patterns of the parent and modified zeolite are compared in Fig. 2.
Since the channel dimensions of modified zeolite are comparable to those of reactant ethylbenzene and product di-ethylbenzenes and benzene, micro-pore diffusion resistance cannot be avoided.
The adsorbed and released extents of the drug onto/from the modified zeolite were determined by UV Vis spectroscopy.
