氨基-磷酸改性铁基空心玻璃微珠催化剂用于天然气湿法氧化脱硫OA北大核心

Objective In order to avoid the problem of equipment blockage caused by sulfur deposition in the conventional natural gas wet oxidation desulfurization process,an iron-based hollow glass beads(HGB)catalyst modified by amino-phosphate difunctional group was developed for the heterogeneous catalytic oxidation regeneration of desulfurization rich liquid in the desulfurization-regeneration step-by-step scheme.Methods Infrared spectroscopy was used to characterize the structure of the catalyst.The effects of the ratio of silane coupling agent(KH-550),roasting temperature and FeCl3·6H2O dosage on the regeneration of desulfurization agent and desulfurization effect were investigated by static desulfurization experiments,and the reusability performance of the catalyst was explored.Results The amino-phosphoric acid modified iron-based HGB catalyst could make the desulfurization rich liquid to be effectively regenerated and remain stable in the acidic desulfurization liquid.Under the conditions of roasting temperature of 300 ℃ for 6 h,mass ratio of HGB to KH-550 of 1∶8 and mass ratio of HGB to FeCl3·6H2O of 1∶5,the iron-based HGB catalyst prepared had the best catalytic performance,and the desulfurization performance kept basically stable after 3 times of repeated regeneration of desulfurization solution.Infrared spectroscopy analysis showed that the catalyst structure remained intact.Conclusions The amino-phosphoric acid modified iron-based HGB catalyst has a good effect on desulfurization rich liquid regeneration in the field of natural gas wet oxidation desulfurization,which provides a new choice for desulfurization rich liquid regeneration at present.