Heterogeneous catalyst of cobalt phthalocyanine tetrasulfonamide loaded on Ca–Al hydrotalcites for oxidative desulfurization of spent sulfidic caustic

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-02-26 DOI:10.1002/jctb.7840

Ruiqi Huang, Zhaoyang Lu, Can Xu, Shuaiting Liang, Honglei Yuan, Geshan Zhang, Lihui Jia, Jun Yuan

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引用次数: 0

Abstract

Background

Spent sulfidic caustic (SSC) from petrochemical and other chemical industries usually contains high concentrations of sulfur ion (S²⁻) and caustic soda (NaOH), which requires effective treatment. Here a CoPcSA/CaAl-LDHs catalyst was successfully synthesized by using a facile one-pot approach for loading cobalt phthalocyanine tetrasulfonamide (CoPcSA) on Ca–Al hydrotalcites (CaAl-LDHs). The material characterization included powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy.

Results

The effect of various parameters such as reaction temperature, catalyst dosage and aeration rate on the catalytic activity was investigated and optimized to be 75 °C, 1.5 mmol L⁻¹ and 2.5 L min⁻¹, respectively. CoPcSA/CaAl-LDHs shows very high catalytic efficiency for S²⁻ removal: a 95.0% S²⁻ removal can be achieved at extremely high concentration of S²⁻ (24 000 mg L⁻¹). In addition, the catalyst exhibits high stability and reusability even after 8 cycles of reuse.

Conclusion

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钙铝水滑石负载酞菁四磺酰胺钴非均相催化剂氧化脱硫废硫酸烧碱

背景石油化工和其他化工行业的废硫酸烧碱（SSC）通常含有高浓度的硫离子（S2−）和烧碱（NaOH），需要进行有效的处理。本文采用一锅法将酞菁四磺酰胺钴（CoPcSA）负载于钙铝水滑石（cal - ldhs）上，成功合成了CoPcSA/CaAl-LDHs催化剂。材料的表征包括粉末x射线衍射、傅里叶变换红外光谱、扫描电镜和x射线光电子能谱。结果考察了反应温度、催化剂用量、曝气率等参数对催化活性的影响，优化后的反应温度分别为75℃、1.5 mmol L−1和2.5 L min−1。CoPcSA/CaAl-LDHs对S2−的去除率非常高：在极高的S2−浓度（24000 mg L−1）下，可达到95.0%的S2−去除率。此外，该催化剂在重复使用8次后仍具有较高的稳定性和可重复使用性。结论CoPcSA/CaAl-LDHs具有良好的催化活性和稳定性，具有良好的应用潜力。©2025化学工业学会（SCI）。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.