海绵钯表面CO、O2、CH4的吸附特性

在300K和0～13.3 kPa压力范围内,测量了海绵钯表面对CO、o2、CH4的吸附等温线.结果表明:钯表面对CO的吸附量先随压力的升高而增加,之后呈现饱和吸附状态;对O2的吸附至少可以分3个区间,在0～100 Pa压力区间,吸附量随压力升高快速增加,此后直至4kPa的区间内,吸附量随压力升高较缓慢增加,但当压力高于4kPa时,吸附量随压力的升高而增加又变得较为显著:CH4的吸附量相对较小,并持续随压力升高而缓慢增加.在整个压力测量区间,CO、CH4的吸附等温线符合兰缪尔模型,而O2的吸附等温线只在压力小于1.33 kPa的区间才符合.

Adsorption Isotherms for CO 2, O, and CH4 on Porous Palladium

At 300 K and between 0~13.3 kPa, adsorption isotherms for O2, CO, CH4 on porous palladium were measured by using PVT method in low-vacuum system. The results indicate that Adsorption isotherms for CO on Pd is identical with the type adsorption isotherms that the amount adsorbed of CO increases with increasing pressure(<2.6 kPa), but little additional CO adsorbs with pressure increasing(<13.3 kPa). Isotherm for adsorption of O2 or CH4 has a different effect in contrast to CO, i.e. significant adsorption of O...