Understanding the Role of Rare Earths in Zeolite Y on the Removal of Sulfur from Hydrocarbon Fuels
Understanding the Role of Rare Earths in Zeolite Y on the Removal of Sulfur from Hydrocarbon Fuels
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DOI：
10.1021/acs.jpcc.1c01103
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发表时间：
2021-04-22
影响因子：
3.7
通讯作者：
Valla, Julia A.
中科院分区：
文献类型：
--
作者：
Lee, Kevin X.;Crowl, Tyler B.;Valla, Julia A.
吸附脱硫是一种很有前途的替代加氢脱硫，以减少有害硫排放的烃类燃料。Y型沸石中的Cu（CuY）表现出有效的硫吸附，特别是当与Ce（CuCeY）配对时。本研究探讨了其他稀土（RE），包括La，Sm和Nd，在RE和CuRE Y和介孔Y（SAY）沸石吸附苯并噻吩（BT）和二苯并噻吩（DBT）。通过电感耦合等离子体发射光谱（ICP-EOS）和X射线荧光（XRF）对沸石上的金属负载进行定量。傅里叶变换红外光谱（FTIR）分析表明，吸附剂在水溶液中存在σ-键合和π-络合等特征吸附模式。X射线衍射（XRD）Rietveld精修确定RE离子优先占据Y沸石的方钠石笼位，而Cu离子占据超笼位。Ce与Cu的协同作用最强，吸附容量最大。本研究的结果提供了深入了解的作用，稀土交换Y对硫吸附。
Adsorptive desulfurization is a promising alternative to hydrodesulfurization for minimizing harmful sulfur emissions from hydrocarbon fuels. Cu in Y zeolite (CuY) has shown effective sulfur adsorption, especially when paired with Ce (CuCeY). This study explores other rare earths (REs), including La, Sm, and Nd, in RE and CuRE Y and mesoporous Y (SAY) zeolites for the adsorption of benzothiophene (BT) and dibenzothiophene (DBT). Metal loadings on the zeolites were quantified by using inductively coupled plasma optic emission spectroscopy (ICP-EOS) and X-ray fluorescence (XRF). Characteristic adsorption modes, such as sigma-bonding and pi-complexation, were observed by using Fourier-transform infrared spectroscopy (FTIR). X-ray diffraction (XRD) Rietveld refinement determined that RE ions prefer the sodalite cages of Y zeolite, while Cu occupies supercage sites. Ce showed the strongest synergy with Cu compared to the other REs and the highest adsorption capacity. The results of this study provide insight into the role of RE exchanged Y on sulfur adsorption.