اصطناع حفازات بتحميل أكاسيد معدنية على مواد أولية محلية لإزالة NOx من غازات احتراق الوقود المنبعثة من عوادم السيارات و دراسة خواصها الحفزية و السطحية : I-اصطناع حفاز على قاعدة مزيج من الزيوليت السوري من موقع السيس و البنتونيت السوري المحملين بأكسيد الفضة و ألومينا-أكسيد الفضة و دراسة خواصها الحفزية و السطحية في تفاعل إزالة أكاسيد الآزوت من الغازات المنبعثة من عوادم السيارات

الملخص EN

A new (BZ Ag2O-Al2O3-Ag2O) catalyst for dNOx has been prepared from silver oxide carried on a matrix of mixture from Syrian natural zeolite, Syrian bentonite and Al2O3.

Mineralogical studies were made to identical the components of the catalyst, montmorillonite and phylippsite and others were observed.

The FTIR diagrams indicated the characteristics patterns of the wave numbers: 3446 cm-1 , 1045.23 cm-1 , 1443 cm-1 and 467.33 cm-1 for all samples before or after the catalytic experiments.

The DTA diagrams indicated characteristic indothermal and exothermal reaction.

The adsorption- desorption of N2 measurements were carried out at -196°C.

A slight decrease of surface area after having the catalyst being covered with Ag2O.

Catalytic experiments were conducted by means of a flow reactor using the gas emitted from car exhaust.

A maximal dNOx rate on the (BZ Ag2O-Al2O3-Ag2O) catalyst was observed at the range of 150°-200°C.

The catalytic data makes it possible to suggest a mechanism for the current reaction.