ADSORPTION AND SURFACE-CHEMISTRY OF LIGHT THIOLS ON NA-ZSM5 AND H-ZSM5

被引:38
作者
GARCIA, CL
LERCHER, JA
机构
[1] INST PHYS CHEM,GETREIDEMARKT 9,A-1060 VIENNA,AUSTRIA
[2] CHRISTIAN DOPPLER LAB HETEROGENE KATALYSE,A-1060 VIENNA,AUSTRIA
关键词
D O I
10.1021/j100179a040
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
The adsorption of ethanethiol and n-butanethiol on H-ZSM5, Na-ZSM5, and SiO2 was investigated by means of IR spectroscopy and thermogravimetry. The stoichiometry at the adsorption sites and the surface chemistry for equilibrium pressures from 10(-5) to 1 mbar was determined. At equilibrium pressures below 10(-2) mbar, ethane- and butanethiol were found to adsorb on H-ZSM5 in three forms. Two of the structures are due to hydrogen-bonded thiol molecules and one due to protonated. On the alkali-metal-exchanged forms of ZSM5 the thiols adsorbed coordinatively via the sulfur atom. For butanethiol on Na-ZSM5, partial dissociation and the formation of new OH groups was observed.
引用
收藏
页码:10729 / 10736
页数:8
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