“…In line of the above studies, Sawa et al also reported significant improvement in catalyst life after dealumination of and upon exchanging zeolites mordenite with Ba [12]. In relevance to migration of Ca while regenerating the catalyst, Larin et al mention that carbonates can form without much energetic barrier and oxides of Mg, Ca, Sr, and Ba will convert to corresponding carbonates [13]. Summarily, one concludes that upon exchanging the zeolites with alkaline earth metals, acid sites (number, strength, and type) get altered, mostly to the benefit of the reaction at hand.…”