Improving Stability of Zeolites in Aqueous Phase via Selective Removal of Structural Defects

• Published in: Journal of the American Chemical Society Vol. 138; no. 13; pp. 4408 - 4415
• Main Authors: Prodinger, Sebastian, Derewinski, Miroslaw A, Vjunov, Aleksei, Burton, Sarah D, Arslan, Ilke, Lercher, Johannes A
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 06.04.2016; American Chemical Society (ACS)
• Subjects: Environmental Molecular Sciences Laboratory; hydrothermal zeolite stability; nuclear magnetic resonance spectroscopy; sieves; silanol defects; silylation; sorption; sorption isotherms; X-ray diffraction; zeolites

Missing silicon–oxygen bonds in zeolites are shown to be the cause for structural instability of zeolites in hot liquid water. Their selective removal drastically improved their structural stability as demonstrated using zeolite beta as example. The defects in the siloxy bonds were capped by reactio...