Cu modified Y zeolite adsorbents have performed excellent adsorption desulfurization performance. Adsorption selectivity of thiophenic sulfur compounds, however, still remained a lower level in the presence of aromatics and olefins. In this work, we aim to address the above challenge, using Cu(I)-NH₄Y zeolites obtained by liquid phase ion-exchanged method. Based on the coordination chemistry theory, the new adsorption active sites ([Cu⁺···NH₃···H⁺] species) can be facilely fabricated at lower temperature (ca. 150 ℃) and under H₂ atmosphere. The desulfurization experimental results indicate that the outstanding breakthrough sulfur capacity (ca. 31.0 mg (S) · g^-1) can be achieved by the Cu(I)_0.10-NH₄Y adsorbent, which is about 2.3 folds as high as the best one reported. After regeneration with three cycles, the adsorbent still remains a high sulfur capacity. Importantly, the thiophene adsorption selectivities of adsorbent have been improved in the presence of aromatics or olefins, which are about 44.5 % and 6.3 %, respectively. Meanwhile, the direct “S-M” bonding mechanism between thiophene and [Cu⁺···NH₃···H⁺] species can be really proposed. Besides, the alkylation reaction between thiophene and olefins is significantly attenuated, mainly ascribed to the majority of strong Brønsted acid sites being masked. The new design idea of effective active sites in the zeolite adsorbents breaks out the traditional high-temperature preparation concept of excellent desulfurization adsorbents and can provide a new direction in the future.

Cu改性Y沸石吸附剂具有优异的吸附脱硫性能。然而，在芳族化合物和烯烃的存在下，噻吩硫化合物的吸附选择性仍保持较低水平。在这项工作中，我们旨在解决上述挑战，使用通过液相离子交换法获得的Cu（I）-NH ₄ Y沸石。根据配位化学理论，可以在较低温度（约150℃）和H ₂气氛下容易地制备新的吸附活性位（[Cu ⁺ ···NH ₃ ··H ⁺ ]种类）。脱硫实验结果表明，优异的突破硫能力（约。Cu（I）_0.10 -NH ₄ Y吸附剂可达到31.0 mg（S）·g ^-1，约为报道的最佳吸附剂的2.3倍。在三个循环的再生之后，吸附剂仍保持高硫容量。重要的是，在芳族化合物或烯烃的存在下，吸附剂的噻吩吸附选择性已经得到改善，芳族化合物或烯烃分别为约44.5％和6.3％。同时，噻吩与[Cu ⁺ ···NH ₃ ···H ⁺]种可以被真正提出。此外，噻吩和烯烃之间的烷基化反应显着减弱，这主要归因于大部分强布朗斯台德酸位点被掩盖了。沸石吸附剂中有效活性位的新设计思想打破了传统的高温制备方法，即优良的脱硫吸附剂，可为今后的发展提供新的方向。