Continuous
Production of Hydrogen from Formic Acid Decomposition Over Heterogeneous
Nanoparticle Catalysts: From Batch to Continuous Flow
Posted on 2019-09-11 - 21:43
We investigate the
continuous generation of hydrogen via the low temperature (<110
°C), additive-free dehydrogenation of formic acid over heterogeneous
Pd/C. Through a combination of kinetic (batch and continuous), spectroscopic,
and mechanistic studies, we develop structure–activity–lifetime
relationships for this process and in doing so reveal that a combination
of pore fouling and poisoning by formate ions results in deactivation
of the catalyst during continuous operation. Although these factors
result in extensive deactivation in Plug Flow mode, promising results
can be obtained by minimizing the steady state concentration of formic
acid by operating in a continuous stirred tank reactor. In doing so,
continuous operation of the system without a loss of activity for
over 2500 turnovers is achieved, under mild conditions and in the
absence of stoichiometric additives.
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Caiti, Massimiliano; Padovan, Daniele; Hammond, Ceri (2019). Continuous
Production of Hydrogen from Formic Acid Decomposition Over Heterogeneous
Nanoparticle Catalysts: From Batch to Continuous Flow. ACS Publications. Collection. https://doi.org/10.1021/acscatal.9b01977