负载型NiB非晶态合金上α-蒎烯加氢催化性能研究

Study on catalytical performance of supported NiB amorphous alloy on hydrogenation of α-pinene

摘要:

采用化学还原法制备了负载型NiB非晶态合金催化剂，并运用XRD,DSC、原位红外、BET和TPD对催化剂的晶相结构，热稳定性、吸附α-蒎烯情况、表面积及表面酸特性等进行了表征，同时以α-蒎烯加氢为探针反应考察了催化剂的活性和选择性。结果表明，α-蒎烯在NiB非晶态合金和载体的表面酸中心协同作用下形成化学吸附态，催化剂表面的酸中心强度影响催化剂的选择性，NiB/ZrO2-Al2O3催化剂使α-蒎烯的转化率达到89.6%，选择性达到91.2%。在反应70h后，α-蒎烯的转化率下降了近10%，而选择性几乎保持不变。

Abstract:

The supported NiB amorphous alloy catalysts were prepared by the chemical reduction method. Crystalline structures, thermal stability、adsorption property of α-pinene、surface area and acid properties of the catalysts were characterized by XRD,DSC, in-suit FTIR, BET and TPD. The α-pinene hydrogenation reaction was chosen to investigate the catalytic properties and selectivity of the catalysts.The results indicated that α-pinene formed chemical adsorption under synergistic action of NiB amorphous alloy catalysts and supports acid site, acid strength affected catalyst’s selectivity,the percent conversion of pinene is 89.6% by using the supported NiB/ZrO2-Al2O3 amorphous alloy catalysts,the catalyst’s selectivity is 91.2%.After 70h reaction, the percent conversion of pinene reduced by 10% while the catalyst’s selectivity remain virtually unchanged.