Article
Polymer Science
Ikuo Taniguchi, Kae Kinugasa, Mariko Toyoda, Koki Minezaki, Haruno Tanaka, Kanato Mitsuhara
Summary: The use of amines in membranes enhances CO2 separation performance, especially under humidity conditions. Polymeric membranes containing piperazine compounds demonstrate high efficiency in CO2 separation, with the performance depending on the chemical structure of the amines.
Article
Chemistry, Physical
Rouzbeh Ramezani, Ida M. Bernhardsen, Renzo Di Felice, Hanna K. Knuutila
Summary: This study investigates the CO2 absorption kinetics in viscous monoethanolamine (MEA) solution using a string of discs contactor, measuring density, viscosity, and mass transfer coefficients over a wide temperature range. The research discusses the effects of temperature, CO2 loading, and viscosity on reaction kinetics and mass transfer coefficients.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Atsushi Matsuoka, Shu Taniguchi, Eiji Kamio, Hideto Matsuyama
Summary: The study investigated the controlling factor of CO2 permeance in an ion gel membrane containing a task-specific ionic liquid. The results showed that the CO2 permeance was not inversely proportional to the membrane thickness, indicating that the rate of CO2 stripping on the permeate side plays a critical role in determining the CO2 permeance. Increasing the decomposition reaction rate of the CO2-carrier complex is essential for achieving high CO2 permeance in ion gel membranes containing a task-specific ionic liquid.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Prakash D. Vaidya, Shaurya Mohan, Namrata Upreti
Summary: The kinetics of CO2 absorption in AHPD/PZ mixtures were investigated in this study, revealing a second-order rate constant of 28,685 m3(kmol s)-1 for the reaction between CO2 and PZ. Various properties of the blend were measured, including density, viscosity, and CO2 diffusivity and solubility. The efficiency of CO2 separation in a continuous, closed-loop system using the AHPD/PZ blend was found to be 62%.
Article
Engineering, Chemical
Di Ao, Guiyang Ma, Chunyang Zang, Yue Qin, Yu Qi, Wenfei Wan
Summary: Using 2-(tert-butylamino) ethanol as a new absorbent in hollow fiber membrane contactors, this study investigated the separation of CO2 from CO2/CH4 gas mixtures. The research results showed that MEA had the best decarbonization performance, and factors such as absorbent flow rate, concentration, and membrane specifications influenced the decarbonization effect.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Longyun Zheng, Bo Zhang, Yi Luo, Kai Guo, Zhengchao Wang, Kun Liu, Xutao Mei, Chunjiang Liu
Summary: In this study, the absorption process of CO2 bubbles in MEA solutions was investigated. It was found that the diameter of the CO2 bubble rapidly decreases and becomes stable in MEA solutions, and the terminal bubble diameter increases with the concentration of MEA. Based on this phenomenon, the absorption process was divided into two stages, mass transfer enhancement and mass transfer deterioration. A mass transfer dynamics model considering the effect of chemical reaction kinetics and reaction-induced bubble surface contamination was proposed and validated by experiment. The findings of this study are important for the design of gas-liquid reactive flow and multiphase reactors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Rattanaporn Apaiyakul, Pipat Na Ranong, Thanthip Kiattinirachara, Pattaraporn Posoknistakul, Pet Pakchotanon, Ratana Jiraratananon, Paitoon Tontiwachwuthikul, Teerawat Sema
Summary: The study found that the density and viscosity of the novel blended PZ-MPDL solvent increased with higher PZ concentration ratio, and decreased with temperature. On the other hand, the physical diffusivity of CO2 decreased with higher PZ concentration ratio, and increased with temperature. Increasing the PZ concentration ratio was shown to improve the CO2 absorption capacity of PZ-MPDL.
Article
Energy & Fuels
Tohid N.Borhani, Shervan Babamohammadi, Navid Khallaghi, Zhein Zhang
Summary: A rate-based non-equilibrium model was developed for CO2 absorption using a mixture of piperazine and potassium carbonate solution, incorporating mass and heat transfer processes between liquid and gas phases. The model considers physical equilibrium at the gas-liquid interface and chemical equilibrium in the liquid phase, with the mass transfer coefficient corrected by an enhancement factor to reflect chemical reactions. The model showed good agreement with experimental data and similar studies in the literature.
Article
Engineering, Chemical
Wenbo Qi, Kaiyun Fu, Xianfu Chen, Minghui Qiu, Yiqun Fan
Summary: This paper proposes a falling liquid-film absorption process using hydrophilic porous ceramic membrane for CO2 capture, which not only retains the advantage of high contact area, but also avoids the issue of membrane wetting. Experimental results show that the falling liquid-film membrane contactor can be a competitive alternative for CO2 absorption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Green & Sustainable Science & Technology
Jae Won Lee, Seonggon Kim, Israel Torres Pineda, Yong Tae Kang
Summary: Nanoabsorbents with excellent heat- and mass-transfer characteristics have attracted research attention for various promising applications. Experimental and theoretical studies have investigated the mass-transfer enhancement of nanoabsorbents for CO2 capture, showing that nanomaterials with high surface area, thermal conductivity, small cluster size, and magnetic properties exhibit optimized CO2 absorption performance. Further research directions include scale-up methods, numerical approaches, and life cycle analysis for industrial applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Engineering, Chemical
Cheng-Hsiu Yu, Yu-Jeng Lin, David Shan-Hill Wong, Chau-Chyun Chen
Summary: This study presents a first-principle process simulation model for the chemical absorption of CO2 with MEA aqueous solutions using RPB. The model accurately simulates the phase and chemical equilibria, the heat and mass transfer, the reactions between MEA and CO2, and the RPB hydraulics. The reaction rate constant is found to be the controlling step with the greatest potential to enhance CO2 absorption performance in RPB.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Mahdi Abbasian, Hesam Najibi
Summary: This study investigates the use of aqueous solutions of amino acids for CO2 absorption. The kinetics of CO2 absorption in sodium serinate solutions and their blend with piperazine were studied. The results show that sodium serinate solution can be used as a CO2 absorbent, and adding piperazine to the solution can improve the CO2 absorption efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Tao Wang, Xinru Wang, Hao Dong, Kun Ge, Klaus Lackner
Summary: Moisture Swing Adsorption enhances the kinetics of CO2 adsorption, making direct air capture of CO2 for emissions reduction possible.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Environmental
Federico Atzori, Francesco Barzagli, Alberto Varone, Giacomo Cao, Alessandro Concas
Summary: It is well known that CO2 capture and re-use is one of the main challenges to tackle global warming. Aqueous ammonia solutions have shown promising potential as sorbents for CO2 capture, offering higher absorption capacity, lower energy requirements, and greater resistance to degradation compared to conventional alkanolamines. This study investigates the chemical absorption of CO2 in aqueous NH3 solutions and proposes a mathematical model to quantify the capture efficiency dynamics and sorbent composition. The results validate the model's effectiveness in designing and optimizing the capture process, considering the effects of temperature and sorbent concentration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Aniqa Imtiaz, Mohd Hafiz Dzarfan Othman, Asim Jilani, Imran Ullah Khan, Roziana Kamaludin, Muhammad Ayub, Ojo Samuel, Tonni Agustiono Kurniawan, NurAwanis Hashim, Mohd Hafiz Puteh
Summary: Membrane contactors are gaining attention in both pilot and industrial scales as a comparatively modern membrane-based mechanism. Carbon capture is one of the most researched applications of membrane contactors. They have the potential to minimize energy consumption and capital costs, but also face challenges such as membrane pore wetting and selection of suitable solvent and membrane pair.
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)