I love food with healthy and simple ingredients. I am a recipe developer and food blogger who is inspired by many cultures around the world. Today, I could be in Thailand having a Tom Yum Soup, and tomorrow I will be in France eating bouillabaisse!
Rogue Foodies is for everyone who loves to travel through the food they eat without borders, labels, or travel restrictions!
Become a member to get new recipes in your email every week
The objective of this study was to evaluate the use of various silica-alumina ratios as a means of modifying the activity and selectivity of a series of different silica-alumina molecular sieves. Replacement of silica with alumina decreased the water adsorption capacity of the alumina-modified zeolites. However, because of the use of a ternary silica-alumina-zeolite mixture (65: 35: 5), the hydrophobicity was retained and the product remained very active with respect to its adsorption behavior. As shown in figure 17, a comparison of silica-alumina zeolite 40 (SA40) with SAGU (SA50) and SAGU50-50 indicated that 60% alumina substitution resulted in a reduction of about 50% in the water adsorption capacity. The activity of the SAGU30-60 formulation was 1.3 times that of SAGU40 in terms of the amount of n-hexane adsorbed at 1 Torr at 50 C. The catalyst was very active, with about 50% of the n-hexane adsorbed at 100 C, or about three times the desirable equilibrium pressure for a water-desalination reactor. The material also was able to desorb n-hexane very efficiently and therefore should usefully be applied to low-temperature water demulsification processes.
Later, the synthesis of zeolite Y was undertaken using a typical zeolite-synthesis procedure. With a silica: alumina ratio of 5:5, the product was strongly basic and had a typical open-framework structure. Further increase in alumina content up to 60% did not lead to further increases in the product. Addition of zeolitic acids to synthetic zeolite Y samples produced a more hydrophobic zeolite Y material that still retained its high activity, with over 70% removal of n-hexane at 50 C and 1 Torr. d2c66b5586