JOURNAL OF MOLECULAR CATALYSIS
|
1987年
/
43卷
/
02期
关键词:
ALUMINA - Applications - NUCLEAR MAGNETIC RESONANCE - Spectrum Analysis;
D O I:
10.1016/0304-5102(87)87008-6
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Two alumina-supported platinum catalysts were prepared to give a high and a low dispersion. They were characterized by four different techniques: hydrogen adsorption, hydrogen-oxygen titration, electron microscopy and **1**9**5Pt nuclear magnetic resonance. Agreement between the two latter methods was quantitative, but only satisfactory with the titration technique. NMR line shapes clearly showed the 'surface' and 'bulk' peaks. The structure-sensitive methylcyclopentane hydrogenolysis reaction was used to confirm, in a micropulse reactor, the respective catalyst dispersions. The utility of the high-dispersion catalyst was demonstrated in a microcontinuous reactor with a severe dehydrogenation stability test.