01673nas a2200169   4500008004100000022001400041245009800055210006900153260007100222300001400293490000700307520099800314100002801312700002101340700002001361856012201381       2010                        eng d  a0887-062400aInfluence of surface hydrophobicity on the esterification of fatty acids over solid catalysts0 aInfluence of surface hydrophobicity on the esterification of fat  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a2154-21610 v243 a<p>The relative roles of surface acidity and hydrophobicity in the methylation of fatty acids (C(8) - C(18)) to the corresponding methyl esters were investigated over three solid acid catalysts: Fe-Zn double-metal cyanide (DMC), sulfated zirconia (SZ), and Al-MCM-41. The esterification reaction was faster and the apparent activation energy was lower over SZ and Al-MCM-41 than on DMC because of their higher acid strength, specific surface area, and pore diameter. Over SZ and Al-MCM-41, the apparent activation energy for esterification increased with the chain length of the fatty acid. A reverse trend, however, was observed over DMC. The relative adsorption of methanol and fatty acids (compared to water) was higher on DMC than on SZ and Al-MCM-41. Hence, in addition to the acidic and textural properties, surface hydrophobicity and relative surface coverage by reactants/products also play an important role in reactions of long-chain fatty acids with alcohols on solid catalysts.</p>1 aSatyarthi, Jitendra, K.1 aSrinivas, Darbha1 aRatnasamy, Paul  uhttps://library.ncl.res.in/content/influence-surface-hydrophobicity-esterification-fatty-acids-over-solid-catalysts-0