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The authors report a plethora of techniques applied to characterize CuZnO / Al2O3 type catalysts (although it is impossible to ascertain the exact nature / content of the catalysts). The key claimed innovation is the use of triethanolamine in place of other inorganic bases as a catalytic promoter for CO hydrogenation to higher alcohols, although the motivation for this is unclear. The production of fuels and chemical intermediates from syngas is a field of tremendous importance and I anticipated the reported reaction is of wide interest to readers of this journal. However, the work is presented in both poor English and with catalyst nomenclature that even after working through several times does not permit clarity as to the content of the catalysts.Two further key important issues are not dealt with£º
1. Triethanolamine is likely soluble under reaction condition, so presumably catalyst deactivates faster than alkali counterparts and is not really any more a heterogeneous catalyst in the true sense ¨C therefore the motivation for using TEA is rather lost on me?
2. All the reported catalysis data appears to say it is % of given alcohol AS A FRACTION OF TOTAL ALCOHOL ¨C but in this case many FT catalysts would also do this as it could be achieved by reducing the alcohol yield dramatically and producing other less desirable products. It is presented as though only alcohols are produced but the total alcohol yield or a carbon fraction converted to alcohol is not given.
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