Ultra‐deep desulfurization of mercaptan by cyclic selective adsorption‐reactive regeneration at room temperature

Abstract

A cyclic process of selective adsorption-reactive regeneration over bifunctional Z-sorb was proposed for desulfurization of heavy mercaptan from gasoline under ambient conditions. A pronounced adsorption capacity (25.7 mg-S/g-adsorbent) and selectivity (206.1, ~10 times over 1-hexene) of heptanethiol over bifunctional Z-sorb were achieved, which can be attributed to the strong adsorbate-adsorbent interaction calculated as high as À44.6 kJ/mol. Catalytic reactive regeneration was proposed to remove stubbornly adsorbed heptanethiol, which achieved complete recovery of Z-sorb in multiple cycles under room temperature. With the aid of minor H 2 O 2 , the strongly adsorbed heptanethiol in the form of metal-thiolate (Zn-SR) transformed to readily desorbed disulfide, which was elucidated via the combined experiment and density functional theory calculations. The developed process provides insights to resolve the trade-off between adsorption selectivity and regenerability, paving the way for energy-efficient industrial adsorptive de-mercaptan of gasoline.

Group IIIA Single-Metal Atoms Anchored on Hexagonal Boron Nitride for Selective Adsorption Desulfurization via S–M Bonds

“…Adsorption desulfurization (ADS) − is a cost-effective, mild reaction condition and green technique that has become one of the highly promising alternative methods for HDS. Studies have shown that some special nanomaterials can be utilized as excellent performance adsorbents due to their high specific surface area. , As an emerging class of two-dimensional materials with high specific surface area, high adsorption capacity, and excellent thermal stability, hexagonal boron nitride nanosheets (BNNSs) − have potential applications in the field of the adsorption process. − BNNSs are a class of two-dimensional materials with graphene-like structures that can form π complexation interactions with dibenzothiophene in the ADS process. , To improve the adsorption performance, doping atoms onto BNNSs is one of the effective strategies, which can change the electronic structure of BNNSs.…”

Amino Acid Ionic Liquids Supported on Nano‐Sized MnO2 for Deep Desulfurization of Model Fuels

“…These sulfur oxides can permanently corrode the metal parts inside the cylinder and increase carbon deposits in the combustion chamber. In addition, the high content of sulfur oxides in the exhaust gas will also affect the activity of the catalyst in the exhaust gas purification treatment system, which will lead to excessive emissions of harmful gases and cause air pollution [1].…”