An iron/copper bimetallic catalytic oxidation desulfurization system was constituted by adding N-methyl pyrrolidone (NMP) and CuCl₂ aqueous solution to an iron-based ionic liquid (Fe-IL) for the removal of hydrogen sulfide from industrial gas streams. The desulfurizer and its sulfur products were characterized using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and X-ray diffraction (XRD). Static desulfurization experiments were conducted to investigate the absorption pattern of the system for H₂S. The addition of NMP and water effectively reduced the acidity and viscosity of the system and improved the gas-liquid mass transfer efficiency. The introduction of CuCl₂ increased the oxidation potential of the solution and enabled Fe³⁺ to efficiently catalyze the oxidation of H₂S to produce monomeric S. The synergistic catalytic oxidation between Fe³⁺/Cu²⁺ is the main reason why the system can maintain a high degree of purification over a long period.

中文翻译：

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[Bmim]Cu2+协同增强FeCl4高效催化氧化去除H2S

在铁基离子液体（Fe-IL）中加入N-甲基吡咯烷酮（NMP）和CuCl ₂水溶液构成铁/铜双金属催化氧化脱硫系统，用于去除工业气流中的硫化氢。采用傅里叶变换红外光谱 (FT-IR)、热重分析 (TGA) 和 X 射线衍射 (XRD) 对脱硫剂及其硫产物进行了表征。通过静态脱硫实验研究了体系对H ₂ S的吸收规律。NMP和水的加入有效地降低了体系的酸度和粘度，提高了气液传质效率。CuCl _2的介绍提高了溶液的氧化电位，使Fe ³⁺能够有效地催化H ₂ S的氧化生成单体S。Fe ³⁺ /Cu ²⁺之间的协同催化氧化是体系能够保持较高程度的主要原因长期净化。