Molecular recognition with cyclodextrin polymer: a novel method for removing sulfides efficiently

Abstract

A series of cyclodextrin polymers (CDPs) were synthesized and they were used for removing different sulfides by molecular recognition. Different CDPs showed a higher desulfurization efficiency for sulfides with an aromatic ring structure than those with an aliphatic chain structure. For different cyclodextrin polymers, b-CDP has a more suitable cavity size for removing DBT. Moreover, it has a good synergetic effect of adjacent cyclodextrin cavities and good electronic interactions with DBT.For these reasons, b-CDP showed the best desulfurization performance, in particular it has good performance for deep desulfurization by forming inclusion complexes and excellent selectivity for removing DBT. Meanwhile, the b-CDP showed good regeneration performance. Various characterization measurements were used to characterize the b-CDP before and after desulfurization of DBT, the results of which showed that it had advantages of wide application temperature range and good structure stability before and after desulfurization. Finally, a molecular recognition mechanism for removing sulfides efficiently was proposed.

High-Efficiency Separation of Aromatic Sulfide from Liquid Hydrocarbon Fuel in Conjugated Porous Organic Framework with Polycarbazole Unit

“…First, the wide extensively conjugated aromatic skeletons in POFs increase aromatic sulfide adsorption selectivity by the high-density π–π interactions. , Second, the high pore volume and inner-connected pore structure of POFs minimize the diffusion resistance of adsorbates . Third, the rigid frameworks and intrinsic persistent porosity of POFs are robust enough for use in harsh environments, which determines their sustainable reuse …”

“…40 Third, the rigid frameworks and intrinsic persistent porosity of POFs are robust enough for use in harsh environments, which determines their sustainable reuse. 41 Oxidatively coupling carbazole−POFs by FeCl 3 is a costeffective methodology for preparing conjugated POFs. The recently reported porous polycarbazole networks exhibit high CO 2 uptake and photoreduction activity owing to their conjugated skeletons and abundant heteroatoms.…”

Green Fuel Desulfurization with β-Cyclodextrin Aqueous Solution for Thiophenic Sulfides by Molecular Inclusion

“…In addition, the loss of adsorption desulfurization agent in the desulfurization process would harm the environment. Recently, the molecular inclusion desulfurization 39 based on the molecular inclusion of cyclodextrin reported by our groups was first used for the fuel desulfurization process by using a series of cyclodextrin polymers (CDP) with tetrafluoroterephthalonitrile as the cross-linking agent. CDP showed excellent removal property for the sulfides containing aromatic ring structures.…”

A New Strategy for Fuel Desulfurization by Molecular Inclusion with Copper(II)-β-cyclodextrin@SiO2@Fe3O4 for Removing Thiophenic Sulfides

“…Recently, a new desulfurization method based on the molecular inclusion of cyclodextrin (CD) has been introduced by our group. , β-CD aqueous solution and cyclodextrin polymers (CDPs) were used in the desulfurization process of fuel for the first time. However, the performance of β-CD aqueous solution was unsatisfactory with low desulfurization efficiency.…”