Pressure drop and axial dispersion in industrial millistructured heat exchange reactors

Moreau, Maxime; Raimondi, Nathalie Di Miceli; Sauze, Nathalie Le; Cabassud, Michel; Gourdon, Christophe

doi:10.1016/j.cep.2015.05.009

Cited by 25 publications

(11 citation statements)

References 16 publications

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“…There are several types of HEs, designed for specific applications: concentric tube HE, shell-and-tube HE, plate HE, shell-and-plate HE, among others. Recently, HE reactors have been considered as promising technologies for thermal control of exothermic reactions [56]. These allow fast mixing of reagents and temperature control, preventing undesirable generation of by-products [57].…”

Section: Heat Exchangersmentioning

confidence: 99%

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Fernandes

Gomes

Simões

et al. 2021

Chemical Engineering Journal

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Biofouling is the unwanted accumulation of deposits on surfaces, composed by organic and inorganic particles and (micro)organisms. Its occurrence in industrial equipment is responsible for several drawbacks related to operation and maintenance costs, reduction of process safety and product quality, and putative outbreaks of pathogens. The understanding on the role of operating conditions in biofouling development highlights the hydrodynamic conditions as key parameter. In general, (bio)fouling occurs in a higher extension when laminar flow conditions are used. However, the characteristics and resilience of biofouling are highly dependent on the hydrodynamic conditions under which it is developed, with turbulent conditions being associated to recalcitrant biodeposits. In industrial settings like heat exchangers, fluid distribution networks and stirred tanks, hydrodynamics plays a dual function, affecting the process effectiveness while favouring biofouling formation. This review summarizes the hydrodynamics played in conventional industrial settings and provides an overview on the relevance of hydrodynamic conditions in biofouling development as well as in the effectiveness of industrial processes.

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Section: Heat Exchangersmentioning

confidence: 99%

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Fernandes

Gomes

Simões

et al. 2021

Chemical Engineering Journal

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“…It is well known that for a cylindrical channel, its value is 16/Re in laminar flow. Moreau et al [51] have reported some values of the Fanning factor for different milli-structured reactors.…”

Section: Pressure Dropmentioning

confidence: 99%

Continuous flow-microwave reactor: Where are we?

Estel

Poux

Benamara

et al. 2017

Chemical Engineering and Processing: Process Intensification

105

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This article presents the different microwave continuous reactors existing, which are reported in literature to carry out chemical synthesis with a more efficient way. It shows how the methods and tools of chemical engineering can be useful and necessary to define, characterize and optimize the microwave reactors. This review scans continuous microwave reactors, by describing the different types of microwave technologies used (multimode, single-mode, coaxial or guided transmission. . .). It then focuses on the various existing reactor geometries and on the control of the electromagnetic field homogeneity. The problem of temperature measurement and overall instrumentation is also addressed (input power, reflected power, continuous adaptation. . .). This review scans the most efficient microwave continuous flow reactors existing in the literature and highlights how the microwave technology is used as well as chemical engineering tools. It points out the reactors geometries, the control of the electromagnetic field and the measurement of the physical parameters (Temperature, microwave power, etc.). Finally, the scale-up of continuous-flow microwave reactors is examined through the existing lab-scale and semi industrial pilot plants described in literature.

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“…Moreau et al confirmed this assumption by performing residence time distribution (RTD) experiments in single-phase flow at liquid flow rates ranging between 50 and 183 mL min À 1 . [10] They correlated the plug flow behavior to the reactor geometry, designed to generate mixing structures that allow homogenization of the tracer over the cross-section. However, no RTD study about the influence of gas on the axial dispersion and liquid residence time in gasliquid flows is currently available.…”

Section: Introductionmentioning

confidence: 99%

Photon Transport and Hydrodynamics in Gas‐Liquid Flow Part 2: Characterization of Bubbly Flow in an Advanced‐Flow Reactor

et al. 2020

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The Corning® G1 Advanced-Flow™ Reactor (G1 AFR) is a commercially available meso-scale reactor which promotes a bubbly flow regime and was previously used to scale-up gasliquid photoreactions. In this paper, we study how the photon transport and hydrodynamics affects the performance of G1 AFR in gas-liquid flow. This was realized by analyzing the flow pattern, liquid residence time, photon flux per liquid volume and optical pathlength using image analysis, residence time distribution (RTD) experiments and chemical actinometry. While the gas content did not significantly influence the RTD responses and photon flux per liquid volume, it affected the liquid residence time and optical pathlength. An empirical correlation was proposed to predict the optical pathlength in gas-liquid flow. The constant photon flux per liquid volume and hydrodynamics found for bubbly flow in G1 AFR translate into high flexibility to choose the flow conditions without affecting the performance of this photoreactor.

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Pressure drop and axial dispersion in industrial millistructured heat exchange reactors

Cited by 25 publications

References 16 publications

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Continuous flow-microwave reactor: Where are we?

Photon Transport and Hydrodynamics in Gas‐Liquid Flow Part 2: Characterization of Bubbly Flow in an Advanced‐Flow Reactor

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