Absorption of carbon dioxide into aqueous sodium hydroxide and sodium carbonate-bicarbonate solutions

Hikita, Haruo; Asai, Satoru; Takatsuka, Takeshi

doi:10.1016/s0300-9467(76)80035-4

Cited by 167 publications

(119 citation statements)

References 13 publications

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“…The limitation is likely kinetic as the solution still contains an abundance of hydroxide ions. Hikita et al (14) demonstrated that, under these conditions, absorption functions as a first-order reaction, i.e., the flux into solution is proportional to concentration of CO2 in the gas phase. According to Astarita (15), the first-order absorption of CO2 into strong hydroxide solutions can be described by eq 5.…”

Section: Capturing Co 2 From Ambient Airmentioning

confidence: 99%

Energy and Material Balance of CO₂ Capture from Ambient Air

Zeman

2007

Environ. Sci. Technol.

333

235

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Current Carbon Capture and Storage (CCS) technologies focus on large, stationary sources that produce approximately 50% of global CO 2 emissions. We propose an industrial technology that captures CO 2 directly from ambient air to target the remaining emissions. First, a wet scrubbing technique absorbs CO 2 into a sodium hydroxide solution. The resultant carbonate is transferred from sodium ions to calcium ions via causticization. The captured CO 2 is released from the calcium carbonate through thermal calcination in a modified kiln. The energy consumption is calculated as 350 kJ/mol of CO 2 captured. It is dominated by the thermal energy demand of the kiln and the mechanical power required for air movement. The low concentration of CO 2 in air requires a throughput of 3 million cubic meters of air per ton of CO 2 removed, which could result in significant water losses. Electricity consumption in the process results in CO 2 emissions and the use of coal power would significantly reduce to net amount captured. The thermodynamic efficiency of this process is low but comparable to other "end of pipe" capture technologies. As another carbon mitigation technology, air capture could allow for the continued use of liquid hydrocarbon fuels in the transportation sector.

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Section: Capturing Co 2 From Ambient Airmentioning

confidence: 99%

Energy and Material Balance of CO₂ Capture from Ambient Air

Zeman

2007

Environ. Sci. Technol.

333

235

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“…For the CO 2 -NaOH system, Hikita et al [11], assumed that the ratio (C 0 /B 0 ) = 0, which is observed when pH > 13. In addition, the value of (C 0 /E 0 ) in (16b) was taken equal to (K 2 B 0 ) −1 .…”

Section: Approximate Solution For Enhancement Factormentioning

confidence: 99%

“…Numerical description for unsteady state absorption Hikita et al [11] Absorption in laminar jet and wetted wall column (NaOH and alkaline buffers)…”

Section: Approximate Solution For Enhancement Factormentioning

confidence: 99%

“…Diffusion coefficient of CO 2 in electrolytes, D CO 2 , has been obtained from [11]: Ionic diffusion coefficients at infinite dilution have been estimated using the Nernst equation [15].…”

Section: A12 Diffusivitymentioning

confidence: 99%

“…Equilibrium constant for reaction (12b), K 2 (m 3 mol −1 ), has been reported in [11] as a function of ionic strength. Table 10.…”

Section: B11 Equilibrium Constantsmentioning

confidence: 99%

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High-throughput microporous tube-in-tube microchannel reactor (MTMCR) was first designed and developed as a novel gas-liquid contactor. Experimentally measured k L a in MTMCR is at least one or two orders of magnitude higher than those in the conventional gas-liquid contactors. A high throughput of 500 L/h for gas and 43.31 L/h for liquid is over 60 times higher than that of T-type microchannel. An increase of the gas or liquid flow rate, as well as a reduction of the micropore size and annular channel width of MTMCR, could greatly intensify the gas-liquid mass transfer. The interfacial area, a, in MTMCR was measured to be as high as 2. 3 ). The artificial neural network model was proposed for predicting a, revealing only an average absolute relative error of \5%.

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Absorption of carbon dioxide into aqueous sodium hydroxide and sodium carbonate-bicarbonate solutions

Cited by 167 publications

References 13 publications

Energy and Material Balance of CO₂ Capture from Ambient Air

Energy and Material Balance of CO₂ Capture from Ambient Air

Mass transfer with complex chemical reactions in gas–liquid systems: two-step reversible reactions with unit stoichiometric and kinetic orders

High‐throughput microporous tube‐in‐tube microreactor as novel gas–liquid contactor: Mass transfer study

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Absorption of carbon dioxide into aqueous sodium hydroxide and sodium carbonate-bicarbonate solutions

Cited by 167 publications

References 13 publications

Energy and Material Balance of CO2 Capture from Ambient Air

Energy and Material Balance of CO2 Capture from Ambient Air

Mass transfer with complex chemical reactions in gas–liquid systems: two-step reversible reactions with unit stoichiometric and kinetic orders

High‐throughput microporous tube‐in‐tube microreactor as novel gas–liquid contactor: Mass transfer study

Contact Info

Product

Resources

About

Energy and Material Balance of CO₂ Capture from Ambient Air

Energy and Material Balance of CO₂ Capture from Ambient Air