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Abstract
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Utilizing industrial wastes as ingredients for zeolite syntheses reduces preparation costs and mitigates the environmental and economic impacts associated with waste processing and disposal. This study demonstrates the successful preparation of various pure zeolites: MFI, faujasite, chabazite, and zeolite beta by substituting 4.5–56% of deionized water (dH2O) in the synthesis gel with water-soluble oxidized disulfide oil (ODSO), a waste byproduct derivative from the E-Merox process. At lowmedium ODSO substitution, intergrown crystals with larger mesopore volume and surface area, in the case of MFI and zeolite beta, compared with those prepared in the absence of ODSO are obtained. At maximum ODSO content, crystals with similar morphology to those prepared from ODSO-free synthesis, but with significantly larger size are formed. In line with the larger crystal size, results show that incorporating ODSO results in a higher crystallization rate, even when compared with samples prepared from ODSO-free gels with similar gel alkalinity. ODSO gave catalysts with higher performance in n-hexane cracking compared with the commercial samples studied across the 500–537 °C temperature range. Finally, the catalyst 25MFI-26%- 36h, prepared with 26% ODSO substitution, was tested as a catalyst additive in fluid catalytic cracking and exhibited enhanced light olefin yields compared with the commercial CBV2314 at various catalyst-to-oil ratios. These findings emphasize the successful valorization of ODSO in the zeolite synthesis, reducing water consumption during zeolite preparation and giving materials with improved textural properties and enhanced catalytic performance.
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