SEARCH Articles Figures Tables Acid catalysts clays Acid clay Acid-activated clay Acid/clay treatment Acidic clay catalyst Acidity of pillared clay Clay active sites Acid-activated Clay minerals Bronsted acidity Clay minerals Lewis acidity Clay minerals acidity, reaction promotion Clay properties Bronsted acid sites Clay properties Lewis acid sites Clay properties surface acidity Clays acid activation Clays acid-treated Clays, acid strength Humic acids, interaction with clays Metal-acidic clays PILC and Acid-Treated Clay as Supports Pillared clays Bronsted acid sites Silicate clays surface acidity Smectite, acid-activated clay Solid acids clays