| 摘要: |
| 目的 为了避免常规天然气湿法氧化脱硫工艺中硫磺沉积引发的设备堵塞问题,开发了一种氨基-磷酸双官能团改性的铁基空心玻璃微珠(HGB)催化剂,用于脱硫-再生分步进行方案中脱硫富液的非均相催化氧化再生。方法 采用红外光谱表征催化剂的结构。通过静态脱硫实验研究了硅烷偶联剂 KH-550的配比、焙烧温度、FeCl3投加量等因素对脱硫剂再生及脱硫效果的影响,并考查了催化剂的重复使用性能。结果 氨基-磷酸改性铁基HGB催化剂可实现脱硫富液的有效再生,且能在酸性的脱硫液中保持稳定,在温度为300 ℃下焙烧6 h、HGB与KH-550质量比为1∶8、HGB与FeCl3·6H2O质量比为1∶5的条件下制备的铁基HGB催化剂具有最佳催化性能,对脱硫液重复再生3次后,脱硫液性能基本保持稳定。红外光谱分析结果表明催化剂结构保持完好。结论 氨基-磷酸改性铁基HGB催化剂在天然气湿法氧化脱硫领域中对脱硫富液的再生具有较好的效果,可为目前脱硫富液的再生提供新的选择。 |
| 关键词: 氨基-磷酸 双官能团 天然气 铁基 空心玻璃微珠 湿法氧化脱硫 催化剂 |
| DOI：10.3969/j.issn.1007-3426.2024.02.003 |
| 分类号: |
| 基金项目:中石化集团公司2020年科技项目“有机硫催化水解技术提升元坝气田商品气质量研究”(120049-1) |
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| Amino-phosphoric acid modified iron-based hollow glass beads catalyst for wet oxidative desulfurization of natural gas |
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XUAN Yuna1, CHEN Hongyuan2, WANG Xingyu2, YANG Chunhan2, YUAN Bo2, PENG Rui2, LIU Zhihao3, QIU Kui2
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1. Material Supply Management Center of Sinopec Northwest Oilfield Company, Luntai, Xinjiang, China;2. College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, China;3. College of Environment and Ecology, Chongqing University, Chongqing, China
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| Abstract: |
| 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. Conclusion sThe 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. |
| Key words: amino-phosphoric acid bifunctional group natural gas iron-based hollow glass beads wet oxidation desulfurization catalyst |
