Specialty chemicals from sugars are destined to displace fermentation to alcohols due to their superior economic value and atom efficiency. Compared to bioethanol, retention of oxygen functional groups increases by 2-5 times the market value of specialty chemicals like furfural, 2,5-furan dicarboxylic acid, 2,5-dimethyl furan, and gamma-valerolactone. For the first time, we report a gas-phase process that converts C-6 monosaccharides to furfural in a microfluidized bed reactor. A spray nozzle inserted directly into the catalytic bed atomizes a fructose water solution to micron-sized droplets; water evaporates, and WO3/TiO2 converts fructose to furfural. Furfural yield reached 22% after 3 h time-on-stream with 15% diformyl furan as coproduct. Acetic acid yield was mostly below 10% but was as high as 27%. During the initial tests, coke and catalyst agglomerates blocked the sparger tip, and run time varied between 1 and 3 h. Insulating the nozzle leading into the bed reduced the injector wall temperature and improved reactor operability; the 15 mm i.d. reactor ran continuously for 19 h after this modification.
Gas-Phase Fructose Conversion to Furfural in a Microfluidized Bed Reactor / D. Carnevali, O. Guévremont, M.G. Rigamonti, M. Stucchi, F. Cavani, G.S. Patience. - In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING. - ISSN 2168-0485. - 6:4(2018), pp. 5580-5587.
|Titolo:||Gas-Phase Fructose Conversion to Furfural in a Microfluidized Bed Reactor|
|Parole Chiave:||Sugar; Microreactor; Fluidized bed; Furfural; Gas-phase; Tungsten; Atomization; Diformyl furan|
|Settore Scientifico Disciplinare:||Settore ING-IND/27 - Chimica Industriale e Tecnologica|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1021/acssuschemeng.8b00510|
|Appare nelle tipologie:||01 - Articolo su periodico|