Mass Transfer Performance for Low SO2 Absorption into Aqueous N,N′-Bis(2-hydroxypropyl)piperazine Solution in a θ-Ring Packed Column

Wei, Fengyu; He, Yuan; Xue, Peng; Yao, Yunjin; Shi, Chengwu; Cui, Peng

doi:10.1021/ie404000w

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…Higher amine concentrations lead to more free active amine molecules per unit volume of solutions to react with CO 2 . The enhancement factor ( E ) is raised which results in a lower mass transfer resistance in the liquid phase and causes a higher K G a v 31, 36, 37.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

et al. 2015

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The mass transfer performance of CO 2 absorption into an innovative tertiary amine solvent, 1-dimethylamino-2-propanol (1DMA2P), was investigated and compared with that of methyldiethanolamine (MDEA) in a packed column with random Dixon-ring packing. All experiments were conducted under atmospheric pressure. The effects of inert gas flow rate, amine concentration, liquid flow rate, CO 2 loading, and liquid temperature on mass transfer performance were analyzed and the results presented in terms of the volumetric overall mass transfer coefficient (K G a v ). The experimental findings clearly indicate that 1DMA2P provided better mass transfer performance than MDEA. For both 1DMA2P and MDEA solutions, the K G a v increased with rising amine concentration and liquid flow rate, but decreased with higher CO 2 loading. The inert gas flow rate only slightly affected the K G a v . A satisfactory correlation of K G a v was developed for the 1DMA2P-CO 2 system.

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Section: Resultsmentioning

confidence: 99%

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

et al. 2015

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“…The range of K y a is within 0.65−1.2 kmol/m 3 •s and the deviation between the calculated and the experimental data are within ±8%. Values of K y a are 2−3 orders of magnitude higher than those in a conventional packed bed, 41,42 showing the advantages of process intensification.…”

Section: Effect Of Alkalinity On So 2 Removal Efficiencymentioning

confidence: 92%

Absorption of SO₂ with Ammonia-Based Solution in a Cocurrent Rotating Packed Bed

Chu

Luo

Shan

et al. 2014

Ind. Eng. Chem. Res.

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The emission of SO 2 leads to serious environmental problems, which has attracted increasing attention. In this work, a cocurrent rotating packed bed (CO-RPB) with a novel SiC structured packing was employed as a process intensification candidate to upgrade existing desulfurization systems. The effects of rotating speed, gas flow rate, liquid flow rate, SO 2 inlet concentration, total salt concentration, and alkalinity on the SO 2 removal efficiency were investigated by adopting the ammoniabased solution as the absorbent. The experimental results showed that the SO 2 concentration at the RPB outlet can meet the new Chinese emission standard very well. In addition, the gas-side volumetric overall mass transfer coefficient (K y a) was deduced based on the mass balance equation, and its correlation was also proposed. The predicted K y a calculated by the correlation was in good agreement with the experimental data, and the deviation was within the range of ±8%.

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“…In our previous work, 1,4-bis(2-hydroxypropyl)-piperazine (HPP), a kind of organic amine with two nitrogen atoms in molecules, as shown in Figure , has been developed as the main component of sustainable flue gas desulfurization agent. Because it has the advantages of high desulfurization efficiency and SO 2 desorbed by thermal desorption method for recycling, the production has been scaled to industrial application through years of work by our group. − …”

Section: Introductionmentioning

confidence: 99%

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties

et al. 2017

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In this work, we have developed a novel aqueous twophase system (ATPS) composed of 1,4-bis(2-hydroxypropyl)piperazine (HPP), Na 2 SO 4 , and H 2 O, which can determine the liquid−liquid equilibrium and phase diagrams at the temperatures of 303.15−323.15 K. Simultaneously, the physical properties such as density, viscosity, refractive index, and surface tension have been determined for the top phases and bottom ones of the ATPS. The results indicate that temperature has no significant effect upon the biphasic region, implying a small enthalpy contribution during phase separation. However, the changes in temperature result in a decrease of tie line slope, because H 2 O molecules are transferred from the bottom phase to the top phase. In determining the physical properties of the system, viscosity and refraction index increase with the system components increasing, during the phase of both HPP and Na 2 SO 4 , while density and surface tension fall with the increase of system components in the top phase and decrease in the bottom one. ATPS would be a new method for removing the heat-stable salts (HSS) containing sulfuric acid root of absorbent for flue gas desulfurization, which is as HPP.

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Mass Transfer Performance for Low SO₂ Absorption into Aqueous N,N′-Bis(2-hydroxypropyl)piperazine Solution in a θ-Ring Packed Column

Cited by 13 publications

References 26 publications

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

Absorption of SO₂ with Ammonia-Based Solution in a Cocurrent Rotating Packed Bed

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties

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Mass Transfer Performance for Low SO2 Absorption into Aqueous N,N′-Bis(2-hydroxypropyl)piperazine Solution in a θ-Ring Packed Column

Cited by 13 publications

References 26 publications

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO2 Absorption between Tertiary Amines in a Randomly Packed Column

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO2 Absorption between Tertiary Amines in a Randomly Packed Column

Absorption of SO2 with Ammonia-Based Solution in a Cocurrent Rotating Packed Bed

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na2SO4, and H2O: Temperature-Dependent Equilibrium Data and Physical Properties

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Mass Transfer Performance for Low SO₂ Absorption into Aqueous N,N′-Bis(2-hydroxypropyl)piperazine Solution in a θ-Ring Packed Column

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

Comparison of Overall Gas‐Phase Mass Transfer Coefficient for CO₂ Absorption between Tertiary Amines in a Randomly Packed Column

Absorption of SO₂ with Ammonia-Based Solution in a Cocurrent Rotating Packed Bed

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties