摘要
The Ni/SBA-15 catalysts were synthesized using the in situ method and the influence of crystallization temperature on nickel utilization efficiency-a critical factor in mesoporous material design-was systematically investigated.The structural characteristics and nickel anchoring capacity were analyzed using XRD,BET,FT-IR,H2-TPR,and ICP-OES.The results demonstrated that the crystallization temperature significantly affected the framework order of SBA-15 and the surface anchoring efficiency of Ni ions.The nickel utilization efficiency increased from 8.4%at 80℃ to 60.49%at 140℃,but then decreased to 47.25%at 160℃,indicating an optimal crystallization temperature window.This provides crucial guidance for tailoring high-performance metal-doped molecular sieves.The optimal catalyst exhibited excellent performance in the hydrogenation of 1,4-butynediol(BYD):the BYD conversion reached 97.25%with 88.99%selectivity of 1,4-butenediol(BED)within 5 h,and reached 99.73%with 87.34%selectivity of 1,4-butanediol(BDO)after 20 h reaction.These results revealed the critical role of crystallization temperature in metal utilization and provided theoretical support for designing highly active molecular sieve catalysts.
本文采用原位法合成了Ni/SBA-15催化剂,并系统研究了结晶温度对镍利用效率的影响--镍利用效率是介孔材料设计的关键因素.我们利用XRD、BET、FT-IR、H2-TPR和ICP-OES分析了催化剂的结构特征和镍锚定能力.结果表明,结晶温度极大地影响了SBA-15的框架顺序和镍离子的表面锚定效率.镍的利用效率从80℃时的8.4%提高到140℃时的60.49%,但在160℃时又下降到47.25%,这表明存在一个最佳结晶窗口.这为制备高性能的金属掺杂分子筛提供了重要指导.最佳催化剂在1,4-丁炔二醇(BYD)加氢反应中表现出优异的性能:反应5 h后,BYD转化率达到97.25%,1,4-丁烯二醇(BED)选择性为88.99%;反应20 h后,转化率达到99.73%,1,4-丁二醇(BDO)选择性为87.34%.这些结果揭示了结晶温度在金属利用率中的关键作用,并为设计高活性分子筛催化剂提供了理论支持.
出处
《分子催化(中英文)》
2026年第1期10-21,I0001,共13页
Journal of Molecular Catalysis(China)
基金
Karamay Key R&D Program Grant(2024zdyf0034)。
