气候变化领域集成服务门户(CCPortal): Ultrafast flow chemistry for the acid-catalyzed conversion of fructose

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DOI	10.1039/c9ee01189g
	Ultrafast flow chemistry for the acid-catalyzed conversion of fructose
	Desir P.; Saha B.; Vlachos D.G.
发表日期	2019
ISSN	1754-5692
起始页码	2463
结束页码	2475
卷号	12 期号:8
英文摘要	Biomass conversion to chemicals and fuels has been epitomized by batch processing and long reaction times that limit the economic viability of future biorefineries and prevent modular manufacturing near the source-production site that is necessary due to the biomass' large water content. We introduce a continuous flow microreactor to enable process intensification and one thousand-fold device miniaturization for remote chemical processing. We demonstrate the approach in HCl-catalyzed fructose dehydration in water. We characterize and quantify the mixing using laser induced fluorescence (LIF) of fluorescent dyes and particle image velocimetry (PIV) of fluorescent microspheres. The estimated mixing times ranged from 0.03 to 4.8 s for residence times from 1 to 120 s, respectively. Moreover, a curved channel geometry induces secondary (Dean) vortices that produce a three-fold increase in mixing by diffusion through advection along the cross-sectional direction of the channel, creating dissipative chaotic mixing under laminar flow. We then obtain for the first time isothermal kinetics of fructose dehydration at short contact times and high temperatures and compare to a previously published, hybrid ab initio and data-driven kinetic model. Rigorous model optimization is carried out and an optimal HMF yield of 54% is attained in a single aqueous phase. High temperatures and low pH improve the reactor throughput by increasing the HMF space-time yield. We demonstrate the highest ever productivity (HMF yield per unit time). Importantly, this can be achieved at ∼100% fructose conversion, eliminating the need for recycling to improve economics. Furthermore, optimization of the reactor dimensions and the specific energy dissipation rate results in ∼60% pressure-drop related energy savings. We describe a methodology to scale-up microreactors to millimeter size and increase productivity 16-fold under optimal conditions. The energy efficiency and cost analysis for HMF production from corn stover of a typical corn farm indicate an optimal strategy for numbering-up millimeter size reactors and, importantly, they underscore the potential feasibility of producing bioproducts in a distributed manner. © The Royal Society of Chemistry 2019.
语种	英语
scopus关键词	Batch data processing; Bioconversion; Catalysis; Chemical industry; Chemical reactors; Dehydration; Energy dissipation; Energy efficiency; Fluorescence; Laminar flow; Manufacture; Mixing; Particle size analysis; Productivity; Velocity measurement; Acid-catalyzed conversions; Continuous flow microreactors; Cross-sectional directions; Fluorescent micro spheres; Laser induced fluorescence; Particle image velocimetries; Process intensification; Specific energy dissipations; Fructose; catalysis; chemistry; energy efficiency; optimization; processing; reaction kinetics; sugar; Zea mays
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162434
作者单位	Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, United States; Catalysis Center for Energy Innovation, 221 Academy Street, Newark, DE 19716, United States
推荐引用方式 GB/T 7714	Desir P.,Saha B.,Vlachos D.G.. Ultrafast flow chemistry for the acid-catalyzed conversion of fructose[J],2019,12(8).
APA	Desir P.,Saha B.,&Vlachos D.G..(2019).Ultrafast flow chemistry for the acid-catalyzed conversion of fructose.Energy and Environmental Science,12(8).
MLA	Desir P.,et al."Ultrafast flow chemistry for the acid-catalyzed conversion of fructose".Energy and Environmental Science 12.8(2019).