摘要
采用傅里叶变换红外光谱仪(FT-IR)、N2吸脱附、X射线衍射(XRD)、透射电子显微镜(TEM)揭示了微波辅助-KOH处理对活性炭的物理化学性能的影响规律。结果表明,活性炭表面的含氧基团的种类增加,微孔明显减少,中大孔的比例增大。通过浸渍-原位还原方法制备了Pt、Pd、Ru、Rh负载微波辅助-KOH处理活性炭催化剂,并对其催化p-叔丁基-α-甲基肉桂醛选择性加氢性能进行了研究。发现Pt具有优异的C=O加氢选择性,而Pd具有优良的C=C加氢选择性。进一步研究了Pd-Pt双组分催化剂催化p-叔丁基-α-甲基肉桂醛加氢产物分布,随着Pt含量的增加,C=O选择性逐步提高,C=C选择性逐渐下降,且当m(Pd)∶m(Pt)=4∶1时,其催化剂的催化性能最佳。
In this paper,Fourier transform infrared spectroscopy(FT-IR),N 2 adsorption-desorption,X-ray diffraction(XRD)andtransmission electron microscopy(TEM)were used to characterize the activated carbon treated via microwave with KOH.The results show that the oxygen-containing groups on the surface of activated carbon increase greatly,and the number of micropores decrease significantly.The selective catalytic hydrogenation performances of p-tert-butyl-α-methyl cinnamaldehyde over Pt,Pd,Ru and Rh supported on activated carbon were investigated.The Pt/C catalyst shows excellent selective hydrogenation for C=O,while the Pd/C catalyst has good selectivity for hydrogenation of C=C.The product distribution of selective hydrogenation of p-tert-butyl-α-methylcinnamaldehyde catalyzed by Pd-Pt bimetallic catalyst was also studied.The results show that the selective hydrogenation of C=O is gradually increased with an increase of Pt content,while the selectivity of hydrogenation of C=C decreases gradually over the Pd-Pt bimetallic catalyst.An optimal catalytic performance is obtained over Pd-Pt bimetallic catalyst when m(Pd):m(Pt)=4:1.
作者
曾利辉
李岳锋
延浩翔
曾永康
张之翔
刘忠文
刘昭铁
ZENG Lihui;LI Yuefeng;YAN Haoxiang;ZENG Yongkang;ZHANG Zhixiang;LIU Zhongwen;LIU Zhaotie(Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education),School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi'an 710119,China;Kaili Catalyst&New Materials Co.,Ltd.Xi'an 710201,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China)
出处
《应用化学》
CAS
CSCD
北大核心
2020年第3期322-331,共10页
Chinese Journal of Applied Chemistry
基金
陕西省科技厅重点产业创新链(群)(2019ZDLGY06-04)资助。
关键词
微波辅助
活性炭
贵金属负载催化剂
选择性加氢
p-叔丁基-α-甲基肉桂醛
microwave-assisted
activated carbon
noble metal supported catalyst
selective hydrogenation
p-tert-butyl-α-methylcinnamaldehyde
