糖糖被动化对硫化NiMo/Al2O3催化剂的氧化抵抗和水解硫活性的影响
Bangqi Zhao1, Minghao Wen1, Yang Li2
1School of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu Avenue 8#, Xindu District, Chengdu, Sichuan 610500, China.
Langmuir : the ACS journal of surfaces and colloids
|February 3, 2026
概括
糖糖被动化保护水处理催化剂免受氧化. 这种方法通过形成保护性碳状沉积物来保持催化剂活性,这对于工业应用至关重要.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 水处理催化剂,如NiMo/Al2O3,在硫化后容易氧化,导致活动丧失.
- 环境氧化降解了活性金属硫化物,损害了水解硫化 (HDS) 过程中的催化剂性能.
- 需要有效的被动化策略,在储存和处理期间保持催化剂的稳定性和活性.
研究的目的:
- 为了研究糖糖 (SA) 作为氧化NiMo/Al2O3水处理催化剂的被动化剂.
- 评估SA使用和被动化温度对抗氧化和HDS活性的影响.
- 了解糖糖被动化保护硫化催化剂的机制.
主要方法:
- 在不同度和温度下用糖糖 (SA) 对NiMo/Al2O3催化剂进行后处理.
- 被动化和非被动化催化剂长时间 (7天) 暴露在环境空气中.
- 热重力测量分析 (TG) 用于量化Mo和Ni硫化物的氧化度.
- 测试二西奥芬 (DBT) 水解硫化 (HDS) 活性,以评估催化剂性能.
主要成果:
- 糖糖被动显著提高了硫化NiMo/Al2O3催化剂的氧化阻力.
- 在450°C以SA/Ni摩尔比为1.5 (LHT-1.5-450) 的最佳被动化将Mo和Ni硫化物氧化率降低了50%以上.
- 形成多孔的碳酸盐沉积物,防止氧化,同时允许反应物进入并保持HDS活动.
- 在暴露于空气后,被动化催化剂的活性损失明显较低 (2.7%的减少),而非被动化催化剂的活性损失则较低 (12.9%的减少).
结论:
- 糖糖被动化是一种有效的方法,可以抑制硫化NiMo/Al2O3水处理催化剂的环境氧化.
- 形成的碳化沉积物提供氧化保护,并通过防止金属聚合来保持催化活性.
- 这种被动化策略确保了催化剂的稳定性并保持了活性,这对于工业化脱硫应用至关重要.
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