Incorporation of zeolite to catalyst base-supports generally endows them with improved catalytic properties, especially those related to selectivity and activity. These effects are due to the stronger than normal acidity of zeolites and their molecular sieve effect. Such properties alter notoriously the way in which metals incorporate into a crystalline sol-gel catalytic matrix. Most noticeable effects on the surface as per EPR analysis occur upon incorporation of copper as metal catalyst when ZSM-5 zeolite is added, then when adding beta-zeolite and finally when using Y-zeolite.