II- تطوير حفاز يحتوي على الكروم والموليبدينيوم من الفئة VIB على قاعدة مزيج من الزيوليت السوري من «موقع ام اذن» و البنتونيت السوري والالومينا لازالة الفحوم الهيدروجينية (CH) غير المحترقة المنبعثة من عوادم السيارات ودراسة خواصهالسطحية و فعاليته الحفزية

A new (ZB-Cr2O3, Al2O3-Cr2O3-MoO3) catalyst for de-CH has been prepared from Cr2O3-MoO3 and carried on a matrix of mixture from Syrian natural zeolite, Syrian bentonite and Al2O3. Mineralogical studies were made to identify the components of the catalyst, montmorillonite and the two zeolites: phylippsite, margerete, and others that were observed. The FTIR diagrams indicated the characteristics patterns at the wave numbers: 3448 cm-1 , 1045.23 cm-1 , for some samples before or after the catalytic experiments. The DTA diagrams indicated characteristic indothermal and exothermal effects. The adsorption-desorption of N2 measurements were carried out at -196°C. A slight decrease of surface area after the catalyst being covered with Cr2O3- MoO3. Catalytic experiments were conducted by means of a flow reactor using the gas emitted from car exhaust. A maximal de-CH rate on the (ZB-Cr2O3, Al2O3-Cr2O3-MoO3) catalyst was observed in the range of 355° -400°C.