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
Amino-phosphoric acid modified iron-based hollow glass beads catalyst for wet oxidative desulfurization of natural gas
宣玉娜 1陈鸿元 2王星渝 2杨春韩 2袁波 2彭锐 2刘志豪 3邱奎2
作者信息
- 1. 中石化西北油田分公司物资供应管理中心
- 2. 重庆科技大学化学化工学院
- 3. 重庆大学环境与生态学院
- 折叠
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.
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.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.
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Key words
amino-phosphoric acid/bifunctional group/natural gas/iron-based/hollow glass beads/wet oxidation desulfurization/catalyst引用本文复制引用
基金项目
中国石化科技项目(2020)(120049-1)
出版年
2024
国家科技期刊平台
NSTL
万方数据