A Radial Flow Contactor for Ambient Air CO2 Capture

Direct air capture (DAC) of CO2 can address CO2 emissions from distributed sources and produce CO2 from air virtually anywhere that it is needed. In this paper, the performance of a new radial flow reactor (RFR) for CO2 adsorption from ambient air is reported. The reactor uses a supported amine sorbent and is operated in a batch mode of operation or semi-continuously, respectively without or with sorbent circulation. The radial flow reactor, containing 2 kg of the adsorbent, is successfully scaled up from the experimental results obtained with a fixed bed reactor using only 1 g of the adsorbent. In the batch operation mode, the sorbent in the annular space of the RFR is regenerated in situ. With sorbent circulation, the RFR is loaded and unloaded batchwise and only used as an adsorber. A sorbent batch loaded with CO2 is transported to and regenerated in an external (fluid bed) regenerator. The RFR unit is characterized by a low contacting energy (0.7–1.5 GJ/ton-CO2) and a relatively short adsorption time (24–43 min) compared to other DAC processes using the same types of sorbents. The contactor concept is ready for further scale-up and continuous application.

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Evaluation of Fixed-Bed Cultures with Immobilized Lactococcus Lactis ssp. Lactis on Different Scales

The Open Biotechnology Journal ◽

10.2174/1874070701711010016 ◽

2017 ◽

Vol 11 (1) ◽

pp. 16-25 ◽

Cited By ~ 1

Author(s):

Rebecca Faschian ◽

Ilyas Eren ◽

Steven Minden ◽

Ralf Pörtner

Keyword(s):

Dilution Rate ◽

Lactococcus Lactis ◽

Scale Up ◽

Fixed Bed ◽

Pilot Scale ◽

Fixed Bed Reactor ◽

Batch Mode ◽

Promising Alternative ◽

Fixed Beds ◽

Pilot Scale Reactor

Fixed-bed processes, where cells are immobilized within macroporous carriers, are a promising alternative to processes with suspended cells. A scale-up concept is presented in order to evaluate the performance as part of process design of fixed-bed processes. Therefore,Lactococcus lactiscultivation in chemostat and batch mode was compared to fixed bed cultures on three different scales, the smallest being the downscaledMultifermwith 10 mL fixed bed units, the second a 100 mL fixed-bed reactor and the third a pilot scale reactor with 1 L fixed bed volume. As expected, the volume specific lactate productivity of all cultivations was dependent on dilution rate. In suspension chemostat culture a maximum of 2.3 g·L-1·h-1was reached. Due to cell retention in the fixed-beds, productivity increased up to 8.29 g·L-1·h-1at a dilution rate of D = 1.16 h-1(corresponding to 2.4·µmax) on pilot scale. For all fixed bed cultures a common spline was obtained indicating a good scale-up performance.

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Scale-up of interleukin-6 production by BHK cells using a radial-flow reactor packed with porous glass beads

Journal of Fermentation and Bioengineering ◽

10.1016/s0922-338x(97)82071-5 ◽

1997 ◽

Vol 84 (3) ◽

pp. 279-281 ◽

Cited By ~ 3

Author(s):

Hitoshi Yoshida ◽

Satoru Mizutani ◽

Hiroshi Ikenaga

Keyword(s):

Porous Glass ◽

Interleukin 6 ◽

Radial Flow ◽

Flow Reactor ◽

Scale Up ◽

Glass Beads ◽

Bhk Cells ◽

Radial Flow Reactor

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Fixed bed radial flow reactor for light paraffin conversion

Focus on Catalysts ◽

10.1016/j.focat.2021.03.044 ◽

2021 ◽

Vol 2021 (4) ◽

pp. 7

Keyword(s):

Radial Flow ◽

Flow Reactor ◽

Fixed Bed ◽

Radial Flow Reactor

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Design of a continuous flow immobilized-cell reactor for biosynthetical production of L-aspartic acid

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19852122 ◽

1985 ◽

Vol 50 (10) ◽

pp. 2122-2133 ◽

Cited By ~ 2

Author(s):

Jindřich Zahradník ◽

Marie Fialová ◽

Jan Škoda ◽

Helena Škodová

Keyword(s):

Aspartic Acid ◽

Continuous Flow ◽

Immobilized Cells ◽

Scale Up ◽

Fixed Bed ◽

Packed Bed ◽

Fixed Bed Reactor ◽

Experimental Program ◽

Design Parameters ◽

Immobilized Cell

An experimental study was carried out aimed at establishing a data base for an optimum design of a continuous flow fixed-bed reactor for biotransformation of ammonium fumarate to L-aspartic acid catalyzed by immobilized cells of the strain Escherichia alcalescens dispar group. The experimental program included studies of the effect of reactor geometry, catalytic particle size, and packed bed arrangement on reactor hydrodynamics and on the rate of substrate conversion. An expression for the effective reaction rate was derived including the effect of mass transfer and conditions of the safe conversion-data scale-up were defined. Suggestions for the design of a pilot plant reactor (100 t/year) were formulated and decisive design parameters of such reactor were estimated for several variants of problem formulation.

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Heat and Hydrogen Management Strategies in an Integrated Autothermal Radial Flow Reactor for Enhancement of Olefin Production

Theoretical Foundations of Chemical Engineering ◽

10.1134/s0040579521020019 ◽

2021 ◽

Vol 55 (2) ◽

pp. 328-340

Author(s):

M. Bayat

Keyword(s):

Radial Flow ◽

Flow Reactor ◽

Management Strategies ◽

Radial Flow Reactor ◽

Olefin Production

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A mathematical model for decoking process of the catalyst in catalytic naphtha reforming radial flow reactor

Fuel Processing Technology ◽

10.1016/j.fuproc.2019.01.016 ◽

2019 ◽

Vol 188 ◽

pp. 172-178 ◽

Cited By ~ 4

Author(s):

Majid Mehraban ◽

Bahram Hashemi Shahraki

Keyword(s):

Mathematical Model ◽

Radial Flow ◽

Flow Reactor ◽

Naphtha Reforming ◽

Radial Flow Reactor

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Modeling NOx Adsorption onto Fe/ZSM-5 Catalysts in a Fixed Bed Reactor

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2012-0015 ◽

2013 ◽

Vol 11 (1) ◽

pp. 19-30 ◽

Cited By ~ 10

Author(s):

Xingxing Cheng ◽

Xiaotao T. Bi

Keyword(s):

Circulating Fluidized Bed ◽

Scale Up ◽

Fixed Bed ◽

Breakthrough Curves ◽

Axial Dispersion ◽

No Oxidation ◽

Fixed Bed Reactor ◽

Model Parameters ◽

Adsorption Model ◽

Nox Adsorption

Abstract A NOx adsorption kinetic model including NO oxidation and adsorption was developed. The NOx and O2 adsorption experimental data from a fixed bed were found to be fitted well to the Freundlich type isotherm. An axial dispersion adsorption model was then developed to simulate the breakthrough curve for NOx adsorption in the fixed bed. The model parameters including mass transfer coefficient and axial dispersion coefficient were fitted from the NOx breakthrough curves measured in a fixed bed. This model can be used for design and scale-up of fixed bed NOx adsorption columns. It can also be extended for the modeling of NOx adsorption in the annulus region of the circulating fluidized bed reactor for catalytic reduction of NOx.

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