Process intensification characteristics of a microreactor absorber for enhanced CO2 capture

Ganapathy, Harish; Steinmayer, Sascha; Shooshtari, Amir; Dessiatoun, Serguei; Ohadi, Michael M.; Alshehhi, Mohamed

doi:10.1016/j.apenergy.2015.10.010

Cited by 48 publications

(21 citation statements)

References 64 publications

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“…The volumetric liquid-side mass transfer coefficient k L a e is the product of k L and a e , which can be used to benchmark the reactor's performance. [12][13][14][15][16]39 3 | EXPERIMENTAL PROCEDURES…”

Section: Only If Kmentioning

confidence: 99%

“…8 However, there is another path to tackle the above challenges in the CO 2 capture industry, namely by developing process intensification equipment/methods to increase the energy efficiency and decrease the capital cost. 2,9 Examples include the application of rotating packed bed, [10][11][12] microreactor, [13][14][15][16] and other intensified equipment. 17,18 Absorption of CO 2 in solvents is mostly based on the physical transfer of CO 2 between a gas and liquid phase, combined with a reversible, liquid side neutralization reaction of CO 2 with the sorbent.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is another path to tackle the above challenges in the CO 2 capture industry, namely by developing process intensification equipment/methods to increase the energy efficiency and decrease the capital cost 2,9 . Examples include the application of rotating packed bed, 10–12 microreactor, 13–16 and other intensified equipment 17,18 …”

Section: Introductionmentioning

confidence: 99%

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Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

et al. 2022

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To develop cost-effective CO 2 capture technology process intensification will play a vital role. In this work, the capabilities of a gas-liquid vortex reactor (GLVR) as novel process intensification equipment are evaluated by studying its interphase mass transfer parameters to build up the fundamentals for its future application to for example, CO 2 capture. The NaOH-CO 2 chemisorption system and Danckwerts' model are applied to obtain the effective interfacial area and liquid-side mass transfer coefficient. Results show that the gas-liquid contact in the GLVR is capable of both generating a large interfacial area in a small reactor volume and creating a region with high-energy dissipation to improve mass transfer. A comparison of the volumetric mass transfer coefficients with data reported in literature for conventional and intensified reactor types confirms a superior mass transfer efficiency and, most importantly, a favorable energetic efficiency of the GLVR.

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Section: Only If Kmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

et al. 2022

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“…Enhancing mass transfer between liquid absorbent and CO 2 is essential in intensifying CC using chemical adsorption. Different strategies have been reported to enhance gasliquid mass transfer, including the use of rotating spiral contactors [30], spinning disc reactors (SDRs) [31], microreactors [32] and rotating packed beds (RPB). In rotating spiral contacting, as the name suggests, the rotation of a spiral channel causes a centrifugal acceleration, forcing the gas and liquid to flow in parallel layers of uniform thickness.…”

Section: Chemical Absorptionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

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“…Main challenges for industrial implementation of post-combustion CO2 capture are high energy requirement for regeneration, aerosol formation and degradation of the amine. Due to the high-energy penalty and aerosols emissions challenge for successful implementation of CO2 capture technologies, a great number of researchers are working in developing the new low-energy penalty solvents, aerosols emissions control, optimization and integration and scale-up of the process [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Rate-based models have been used for the simulation of CO2 absorption process.…”

Section: Introductionmentioning

confidence: 99%

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

et al. 2017

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In many chemical industrial processes, mass transfer across gas-liquid interfaces accompanied by chemical reaction is the governing phenomena. In case of mass transfer accompanied by a chemical reaction in the liquid phase, the reaction will enhance mass transfer and generally the mass transfer enhancement is quantified in terms of an enhancement factor. Large number of enhancement factor models have been developed in literature and used without critical analysis for analyzing pilot data for CO2 absorption into aqueous amines. In order to perform such a critical analysis, 24 models are tested using lab-scale experimental data from four independent apparatuses for CO2 absorption into MEA solutions covering a range of different conditions such as short and long contact times, with and without gas phase resistance, high and low CO2 loadings and temperatures. Of the 24 enhancement factor models tested only six models were found to satisfactorily predict the experimental CO2 fluxes. These were the models based on the simple pseudo-first order reaction assumption, Emodels 1, 2 and 3 by Hatta [2] and Dankwerts [4] respectively, Emodel 20, the deCoursey and Thring [44] model based on Danckwert's surface renewal theory with unequal diffusivities, Emodel 24, the recently published generalized model by Gaspar and Fosbøl [51] and Emodel 21, the Tufano et al. [67] model based surface renewal theory. All these models were found to work equally well to the discretized penetration model. No significant difference was found between Emodels 1, 2 and 3, indicating that whether one uses as basis a film, penetration or surface renewal model, is of insignificant importance. The success of the simple models is attributed to the short contact times in the experiments used as basis and the accuracy of the kinetic model. Contact times of the same magnitude between mixing points is also encountered in industrial packings and it is believed that the simple enhancement factor models may work well also in these cases if an accurate kinetic model is used.

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Process intensification characteristics of a microreactor absorber for enhanced CO2 capture

Cited by 48 publications

References 64 publications

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Process intensification technologies for CO2 capture and conversion – a review

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

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Process intensification characteristics of a microreactor absorber for enhanced CO2 capture

Cited by 48 publications

References 64 publications

Chemisorption of CO2 in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO2 in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Process intensification technologies for CO2 capture and conversion – a review

Applicability of enhancement factor models for CO2 absorption into aqueous MEA solutions

Contact Info

Product

Resources

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Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

Chemisorption of CO₂ in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment