Physical properties of aqueous solutions of potassium carbonate + glycine as a solvent for carbon dioxide removal

Shaikh, Muhammad Shuaib; Shariff, Azmi Mohd; Bustam, Mohammad Azmi; Murshid, Ghulam

doi:10.2298/jsc130818133s

Cited by 16 publications

(6 citation statements)

References 26 publications

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“…µ water = 1.86 × 10 −6 exp 16400 RT (21) The liquid viscosity of 15wt.% PC + 3 wt.% GLY can be approximated using the correlation provided by Shuaib et al [15], as shown in Equation 22:…”

Section: Reaction Modelmentioning

confidence: 99%

“…The potential of PCGLY is supported by its environmental friendly properties and has less toxicity than MDEA [24,27]. PCGLY also requires lower regeneration energy as compared to MDEA [15,27,32,52]. Due to the high solvent temperature in the absorber, the required energy for stripping process is lower.…”

Section: Pcgly As Potential Green Solventmentioning

confidence: 99%

“…Today, alkanolamines solvent used in the packed absorption column causes several effects to the environment, such as corrosion, high toxicity, and degradation of products that need to be handled thus far [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

et al. 2020

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The removal of carbon dioxide (CO2) at offshore operation requires an absorption system with an environmentally friendly solvent that can operate at elevated pressure. Potassium carbonate promoted with glycine, PCGLY, is a green solvent that has potential for offshore applications. For high solvent concentrations at elevated pressure, the by-product of CO2 absorption consists of precipitates that increase operational difficulty. Therefore, this study was done to assess the CO2 absorption performance of non-precipitated PCGLY with concentration 15wt%PC+3wt%GLY, which is known to have comparable solubility performance with MDEA. A packed absorption column was used to identify the CO2 removal efficiency, mass transfer coefficient in liquid film, k l a e , and overall volumetric mass transfer coefficient, K G a v . A simplified rate-based model was used to determine k l a e and K G a v based on the experimental data with a maximum MAE value, 0.057. The results showed that liquid flow rates and liquid temperature gives significant effects on the k l a e and K G a v profile, whereas gas flow rate and operating pressure had little effect. The CO2 removal efficiency of PCGLY was found to be 77%, which was only 2% lower than 1.2 kmol/m3 MDEA. K G a v of PCGLY is comparable with MDEA. The absorption process using PCGLY shows potential in the CO2 sweetening process at offshore.

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Section: Reaction Modelmentioning

confidence: 99%

Section: Pcgly As Potential Green Solventmentioning

confidence: 99%

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Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

et al. 2020

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“… 20 Another reported solubility data 21 has shown that 15 wt % PC + 3 wt % glycine is sufficient for the removal of CO 2 at high pressure, thus encouraging the experimental work to be conducted at a bench scale mini pilot plant. 6 Then, regression of physical properties, particularly the density and viscosity that were obtained from the literature, 22 are carried out in Aspen Plus.…”

Section: Research Methodologymentioning

confidence: 99%

CO₂ Removal via an Environmental Green Solvent, K₂CO₃–Glycine (PCGLY): Investigative Analysis of a Dynamic and Control Study

et al. 2022

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Promoted potassium carbonate with glycine has been actively investigated as a chemical solvent for the removal of CO 2 . Though a vast number of studies have been reported for potassium carbonate, dynamic studies regarding this promoted solvent are not yet extensively reported in the literature. In this work, a steady-state simulation has been performed via an equilibrium stage model in Aspen Plus V10 using the experimental data of an absorber from the bench scale pilot plant (MINI CHAS) located in Universiti Teknologi PETRONAS. In this study, 15 wt % K 2 CO 3 + 3 wt % glycine is utilized as the medium for absorption, and the operating pressure is set at 40 bar to imitate the natural gas treatment process. The removal observed from the pilot plant is about 75% and the steady-state simulation with a tuned vaporization efficiency managed to replicate a similar result. The transient analysis is performed via activating a flow-driven method, and the simulation is transferred into Aspen Dynamic. A simple control strategy using a proportional–integral (PI) controller is installed at the gas outlet to monitor the CO 2 composition, and further disturbances are introduced at the inlet gas flow rate using a step test and ramp test. The controller is tuned using a trial-and-error method and a satisfactory response is achieved under varying changes in the inlet gas flow rate. Further investigation is carried out using the model predictive controller (MPC), in which 5000 data points are generated through pseudorandom binary sequence (PRBS) analysis for state-space model system identification. The state-space model identified as the best is then used to design the MPC controller. A disturbance rejection test on the MPC controller is conducted via changing the gas flow rate at 5% and a quick response is observed. In conclusion, both MPC and PI controllers managed to produce a good response once the disturbance was introduced within the CO 2 –potassium carbonate–glycine (PCGLY) system.

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“…CO 2 capture process [12][13][14][15]. Among the studied amino acid salts, L-prolinate is the most promising to be used for CO 2 capture [15,16].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental studies and artificial neural network modeling of surface tension of aqueous sodium l-prolinate solutions and piperazine blends

Shaikh

Shariff²,

Bustam³

et al. 2019

Chinese Journal of Chemical Engineering

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Physical properties of aqueous solutions of potassium carbonate + glycine as a solvent for carbon dioxide removal

Cited by 16 publications

References 26 publications

Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

CO₂ Removal via an Environmental Green Solvent, K₂CO₃–Glycine (PCGLY): Investigative Analysis of a Dynamic and Control Study

Experimental studies and artificial neural network modeling of surface tension of aqueous sodium l-prolinate solutions and piperazine blends

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Physical properties of aqueous solutions of potassium carbonate + glycine as a solvent for carbon dioxide removal

Cited by 16 publications

References 26 publications

Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

Mass Transfer Performance Study for CO2 Absorption into Non-Precipitated Potassium Carbonate Promoted with Glycine Using Packed Absorption Column

CO2 Removal via an Environmental Green Solvent, K2CO3–Glycine (PCGLY): Investigative Analysis of a Dynamic and Control Study

Experimental studies and artificial neural network modeling of surface tension of aqueous sodium l-prolinate solutions and piperazine blends

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Product

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CO₂ Removal via an Environmental Green Solvent, K₂CO₃–Glycine (PCGLY): Investigative Analysis of a Dynamic and Control Study