The
bioaqueous phase generated during biomass conversion to biofuel
and biochemicals, e.g., fast pyrolysis and ex situ catalytic pyrolysis,
contains a large number of organics, leading to a high chemical oxygen
demand (COD) for its treatment. In this study, we demonstrate its
catalytic conversion to bioacetic acid solution and propose a recycling
strategy thereof. We found that the diluted bioaqueous phase (e.g.,
C content <0.5 wt %) can be selectively (>90%) converted to
acetic
acid with nondetectable impurities in solution. The solution contains
1.3–1.5 wt % acetic acid and can be directly used for demineralization
of biomass in the biorefineries. This recycling strategy enhances
the sustainability of the biobased economy and sheds light on production
of biobased acetic acid, which has been recognized as a smart drop-in
chemical.
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