SEARCH Articles Figures Tables Acid-base bifunctional heterogeneous catalysts Carboxylic acids heterogeneous catalysts Catalysts heterogeneity Catalysts heterogeneous Catalysts heterogenous Conjugated linoleic acids heterogeneous catalysts Esterification of alcohols using heterogeneous acid catalyst Heterogeneous acid catalysts Friedel-Crafts acylation Heterogeneous acid catalysts biodiesel synthesis Heterogeneous acid-base catalysts Heterogeneous catalyst Bronsted acid sites Heterogeneous catalyst acetic acid conversion Heterogeneous solid acid catalysts Heterogenized catalysts