The impact of preparation route on the performance of silver dodecatungstophosphate/? zeolite catalysts in the ethylene production

Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one most important constituents in chemical industry. The paper emphasizes different synthesis routes hybrid materials consisting dodecatungstophosphoric acid silver salt (AgPW) ? zeolite—stepwise wet impregnation, silver-exchange zeolite, dry mixing precursors. Composite preparation procedures induced minor effects on weak sites, while strong sites were increased significantly. ?/AgPW composites prepared by two-steps impregnation ion-exchange have content total acidity higher comparison to pure AgPW zeolite. This is a result precursors synergetic effect—cumulative acidic are generated presence well-dispersed Keggin ions zeolite network. samples with exhibit conversion ethanol dehydration reaction, i.e., ion-exchanged ?AgPW sample has attained over 81%, wet-impregnated significant 86%. distribution active phase found be crucial both stable high selectivity results ethylene from ethanol, which regarded as processes environmental sustainable industrial chemistry.