基于Ni-Al催化系统的高度选择性和稳定的Cu催化剂,用于将生物乙醇升级为n-butanol
Yan Xiao1, Nannan Zhan1, Jie Li1
1Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou 311231, China.
具有-支的铜催化剂通过Guerbet合反应有效地将乙醇转化为butanol. 尼-系统表现出协同效应,增强乙醇转化,丁醇选择性和催化剂稳定性.
科学领域:
- 不同质的催化剂.
- 绿色化学是一种绿色化学.
- 生物可再生资源是生物可再生资源.
背景情况:
- 乙醇升级为butanol正在获得引力,这是由于生物乙醇的可用性和butanol的多样化应用.
- 格尔贝合反应是这种转换的关键途径.
研究的目的:
- 研究各种支持的铜 (Cu) 催化剂的催化性能,用于将乙醇转化为butanol.
- 探索- (Ni-Al) 催化系统对反应性,选择性和稳定性的协同效应.
主要方法:
- 四个支持的Cu催化剂的合成和表征:Cu/Al2O3,Cu/NiO,Cu/Ni3AlOx,以及Cu/Ni1AlOx.
- 使用格尔贝特合反应对乙醇转换的催化性能评估.
- 先进的表征技术包括XRD,TEM,XPS,H2-TPR,以及CO2/NH3-TPD.
主要成果:
- 含Ni的催化剂表现出更高的反应性,而含Al的催化剂表现出更好的稳定性.
- 观察到Ni-Al系统之间的显著合作效应,增强了乙醇转化,丁醇选择性和催化剂稳定性.
- Cu 种作为乙醇脱/化的活性场所,Ni-Al-LDH 衍生支持为 aldol 凝聚提供了必要的酸基场所.
结论:
- 尼-催化系统表现出协同效应,通过Guerbet合导致高效和稳定的乙醇升级为butanol.
- 催化剂失活与强大的可还原性有关,如Cu/NiO中所见,可在反应过程中发生结构变化.
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