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- W4306408084 abstract "One of the most potential byproducts of transesterification that has been produced in a large amount is glycerol. Converting glycerol into Solketal via catalytic acetalization using natural zeolites is an interesting route to improve its economic value. Natural zeolites are abundant and inexpensive catalysts with low crystallinity and surface area. Thus, modification of its properties is required to improve material characteristics and alter the transesterification reaction. Investigation of the effect of NaOH concentration treatment on the Bayah natural zeolite was performed from 0.1 to 0.4 M NaOH at 65°C and 30 minutes of mixing. Physical characteristic analysis, such as X-ray diffraction, proves that natural zeolite from Bayah was identified predominantly as clinoptilolite. The crystallinity significantly improved after NaOH treatment and could reach a high crystallinity material at 0.4 M NaOH. The textural properties using nitrogen physisorption are also shown by a high surface area of 164 m2/g (from parent Z-0.4; 19 m2/g). In addition, the mesopore volume also improved after alkali treatment, increasing the mass transfer of molecules. The application of modified natural zeolite for glycerol acetalization was tested in a glass tube reactor at a temperature of 50°C for 90 minutes showing a significant alteration in conversion from 3.5% (parent zeolite) to 90.4% (modified zeolite)." @default.
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- W4306408084 date "2022-01-01" @default.
- W4306408084 modified "2023-10-18" @default.
- W4306408084 title "Catalytic acetalization of glycerol waste over alkali-treated natural clinoptilolite" @default.
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- W4306408084 doi "https://doi.org/10.1016/j.rechem.2022.100584" @default.
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