Probing the Catalytic Efficiency of Supported Heteropoly Acids for Esterification: Effect of Weak Catalyst Support Interactions

Table 4

Surface area and elemental analysis of tungsten (W) in the catalyst for esterification of acetic acid with heptanol.

Catalyst	Surface area (m^2/g)	W % before reaction	W % after reaction
HPW-K	9	2.4	0.5
HPW-B	8	0.8	0.6
HPW-M	169	1.6	0.7