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首页> 外文期刊>Iranian journal of chemistry & chemical engineering >Synthesis of Zeolite Y from Kaolin and Its Model Fuel Desulfurization Performance: Optimized by Box-Behnken Method
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Synthesis of Zeolite Y from Kaolin and Its Model Fuel Desulfurization Performance: Optimized by Box-Behnken Method

机译：从高岭土合成沸石Y及其模型燃料脱硫性能：由Box-Behnken方法进行优化

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摘要

In this research, zeolite Na-Y was synthesized from Kaolin without an organic template under the non-hydrothermal condition to adsorb sulfur compound. Model fuel desulfurization was optimized by employing the Box-Behnken experimental design with 2 center points, the three parameters, and one response value. The objective was to find how sorption capacity is related to alkali fusion temperature, crystallization time, and aging time. Optimal DBT adsorbent was synthesized at 550 degrees C, minimum crystallization time, and maximum aging time. The zeolite samples were characterized by FT-IR and XRD. The crystallinity of the samples was lower than the crystallinity of commercial zeolite Y. During zeolite preparation, there was a competition between zeolite Na-Y, Na-P, Na-X and Na A. The equilibrium results were well fitted by the Langmuir and Freundlich isotherms for the best adsorbent. The largest DBT adsorption capacity, 32.67 mg DBT/g, was calculated for the optimal adsorbent. Pseudo-first order and pseudo-second-order models were evaluated to understand the kinetics of the adsorption process. The reduction of DBT obeyed the second-order model of kinetic. Ni-Y and La-Y zeolites were prepared by the liquid-phase ion-exchange method. The maximum DBT adsorption capacity has been observed for Ni-Y (similar to 72.25 mg DBT/g) and La-Y (similar to 66.59 mg DBT/g).
机译：在该研究中，沸石Na-y由高岭土合成而没有有机模板的非水热条件，以吸附硫化合物。通过使用2个中心点，三个参数和一个响应值，通过使用Box-Behnken实验设计来优化模型燃料脱硫。目的是发现吸附能力如何与碱融合温度，结晶时间和老化时间有关。最佳DBT吸附剂在550℃，最小结晶时间和最大老化时间中合成。沸石样品的特征在于FT-IR和XRD。样品的结晶度低于商业沸石Y的结晶度。在沸石制剂期间，沸石Na-y，Na-P，Na-X和Na A之间存在竞争。平衡结果由Langmuir良好装配， Freundlich等温机构最好的吸附剂。计算最大的DBT吸附容量，32.67mg DBT / g，用于最佳吸附剂。评估伪第一顺序和伪二阶模型以了解吸附过程的动力学。 DBT的减少遵循了动力学的二阶模型。通过液相离子交换方法制备Ni-Y和La-Y沸石。已经观察到最大DBT吸附容量（类似于72.25mg DBT / G）和La-Y（类似于66.59mg DBT / G）。

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