一种具有丰富活性Ti-VI物种的化-1 (TS-1) 催化剂,用于有效地将乙烯转化为糖醇
Huali Tan1, Yi Zuo1, Gudan Li1
1State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian, 116024, China.
Angewandte Chemie (International ed. in English)
|March 16, 2025
概括
一种新的双化学后处理增强了二氧化-1 (TS-1) 催化剂,以从乙烯和过氧化中有效地生产单甘醇. 这种方法提高了催化活性和选择性,为工业应用提供了更绿色的替代方案.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 从乙烯和过氧化 (H2O2) 中直接合成乙烯糖醇 (EG),为糖醇生产提供了一种环保的途径.
- 双功能催化剂是必不可少的,需要乙烯环氧化和乙烯氧化物水化活动.
- 常规的用三价金属修改的氧化-1 (TS-1) 催化剂通常显示氧化活性降低.
研究的目的:
- 为TS-1催化剂开发一种后处理方法,在增强氧化活性的同时引入酸位.
- 为了提高从乙烯和H2O2.2.中合成乙烯糖醇的一合成的催化性能.
主要方法:
- 使用四烯氨酸氧化物 (TPAOH) 和 (NH4) 2CO3 的双化学后处理对TS-1进行了应用.
- 修改TS-1的表征,以识别活跃物种和结构变化.
- 评估催化剂在从乙烯和H2O2.2中合成EG的一合成中的性能.
主要成果:
- 后处理成功地产生了丰富的Ti (OSi) 2 (OH) 4 (Ti-VI) 物种,并在TS-1框架内创建了内部空洞.
- Ti-VI物种具有高氧化活性和酸性质,这对双功能催化非常重要.
- 修改后的TS-1催化剂实现了98.6%的H2O2转化和99.8%的EG选择性,显著优于传统的TS-1.
结论:
- 双化学后处理是一种有效的策略,可以创建具有增强EG合成性能的双功能TS-1催化剂.
- Ti-VI物种和内部腔的形成是改善催化活性和选择性的关键.
- 这种方法为可持续的糖醇生产带来了有前途的进展.
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