Article
Energy & Fuels
Wen-Ling Li, Hong-Wei Liang, Jian-Hong Wang, Lei Shao, Guang-Wen Chu, Yang Xiang
Summary: This paper numerically simulated the chemical absorption process of CO2 by MEA solution in a microporous tube-in-tube microchannel reactor (MTMCR) using a mesoscale mass transfer model and reaction kinetics. The study found that MEA concentration had a significant influence on CO2 absorption, and the mass transfer coefficient in MTMCR was significantly higher than in a randomly packed bed. Overall, this research lays a theoretical foundation for simulating complex gas-liquid systems using the CFD method.
Article
Energy & Fuels
Wen-Ling Li, Hong-Wei Liang, Jian-Hong Wang, Lei Shao, Guang-Wen Chu, Yang Xiang
Summary: This study combines mesoscale mass transfer model with reaction kinetics to numerically simulate the chemical absorption process of CO2 by MEA solution in a microporous tube-in-tube microchannel reactor. The research found that MEA concentration has the most significant impact on CO2 chemical absorption, with K(G)a in the MTMCR being over 200 times higher than in a randomly packed bed, and the local mass transfer rate being one order of magnitude higher.
Article
Thermodynamics
Son Ich Ngo, Young-Il Lim, Doyeon Lee, Myung Won Seo, Sungwon Kim
Summary: This study investigated the hydrodynamics, reaction kinetics, and heat transfer of a bench-scale bubbling fluidized bed reactor for CO2 methanation. The study successfully identified the effects of hydrodynamics and reaction kinetics on heat transfer coefficient in the reactor.
ENERGY CONVERSION AND MANAGEMENT
(2021)
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)
Article
Thermodynamics
Hyungseok Nam, Jung Hwan Kim, Hana Kim, Min Jae Kim, Sang-Goo Jeon, Gyoung-Tae Jin, Yooseob Won, Byung Wook Hwang, Seung-Yong Lee, Jeom-In Baek, Doyeon Lee, Myung Won Seo, Ho-Jung Ryu
Summary: In this study, CO2 methanation was conducted using a 0.2 kW CH4 bench-scale fluidized bed reactor with approximately 13 kg nickel-based catalyst to investigate the impact of temperature, gas velocity, and H-2/CO2 ratio on CO2 conversion, CH4 purity, and CH4 selectivity. Response surface methodology was employed to design experimental conditions to evaluate the effect of operating variables, and optimal conditions were determined for maximum CO2 conversion and CH4 purity.
Article
Engineering, Environmental
Hailun Ren, Haidong Zhang, Wenbin Li, Zhongli Tang, Donghui Zhang
Summary: This paper adopts a recently developed two-equation turbulent model based on computational mass transfer (CMT) to simulate the capture process of carbon dioxide by potassium carbonate particles in a gas-solid bubbling fluidized bed. The model uses auxiliary equations to determine the turbulent mass diffusion of species, providing a more rigorous simulation compared to empirical turbulent Schmidt number models. The simulated results show satisfactory agreement with experimental data, confirming the validity of the model. Additionally, the paper characterizes and discusses the turbulent mass diffusion in the bubbling fluidized bed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Dongdong Feng, Yunzhi Li, Peicheng Yan, Yu Zhang, Chunfei Wu, Yalong Zhang, Jianmin Gao, Shaozeng Sun
Summary: The use of functionalized biochar as an absorbent can enhance the mass transfer process of new ammonia-based CO2 capture, significantly improving the absorption capacity and capture efficiency of CO2. This study provides an innovative approach to improve ammonia-based CO2 capture method and reduce harmful carbon emissions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Zhengliang Huang, Yun Shuai, Congjing Ren, Yao Yang, Jingyuan Sun, Jingdai Wang, Yongrong Yang
Summary: The effects of liquid and gas parameters on the liquid volumetric mass transfer coefficient in a cold-mold device were investigated. The results showed that increasing the liquid nozzle outlet diameter, shortening the distance between the liquid nozzle outlet and gas distributor, or decreasing the diameter of the gas distributor can enhance the mass transfer performance of the liquid.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Engineering, Environmental
Byungchan Jung, Seongho Park, Chulwan Lim, Woong Hee Lee, Youngsub Lim, Jonggeol Na, Chul-Jin Lee, Hyung-Suk Oh, Ung Lee
Summary: The electrochemical conversion of CO2 using a continuous flow membrane reactor is a promising technology that can achieve high productivity by optimizing the flow pattern, resulting in a significant increase in CO production rate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Jose Manuel Vadillo, Lucia Gomez-Coma, Aurora Garea, Angel Irabien
Summary: The review focuses on the research development of postcombustion carbon capture using membrane technology, with emphasis on the performance of the CO2 desorption process. It presents the main impact factors in membrane contactor technology and discusses the current status and future challenges to improve the technology for industrial implementation.
Article
Engineering, Environmental
Kwanghwi Kim, Hyunji Lim, Hyun Sic Park, Jo Hong Kang, Jinwon Park, Hojun Song
Summary: Controlling SO2 emissions is crucial for environmental and human health. Various techniques, including limestone and ammonia solutions, have been proposed. However, ammonia solutions have the problem of volatility. This study investigated the use of amino acid additives to improve SO2 absorption in aqueous ammonia solution and found that histidine showed the best performance. The study also analyzed the SO2 absorption mechanism using nuclear magnetic resonance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Chemical
Maedeh Pahlevaninezhad, Nasrin Etesami, Mohsen Nasr Esfahany
Summary: This study experimentally evaluated the effect of Fe3O4 nanoparticles on the CO2-water mass transfer coefficient during absorption, showing that adding Fe3O4 nanoparticles to water increases the mass transfer coefficient and it increases with an increase in nanofluid concentration. The presence of a magnetic field further enhanced the mass transfer efficiency.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Guohua Yang, Di Wu, Yuanbo Gou, Yiyuan Dong, Jin Jiang, Yafen Chen, Ming Zhang, Ci Song, Jiankang Jiang, Yong Jia
Summary: This study investigates the mass transfer process of SO2 absorption through experiments and proposes a mass transfer coefficient containing parameters such as pH, gas flue rate, and liquid to gas ratio. The results show that the calculated SO2 mass transfer rate agrees well with the measured data, with a relative error of less than +/- 20%.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Environmental
Valery A. Danilov, Martin Wichert, Gunther Kolb
Summary: A dynamic two-dimensional model has been developed to describe the transfer processes in a microchannel reactor for CO2 methanation. The model incorporates deactivation and sulfidation submodels, taking into account the chemisorption of impurity. The results show that the developed model adequately describes the reaction behavior of the microchannel reactor.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Fouad Azizi, Lynn Kaady, Mahmoud Al-Hindi
Summary: This study presents a novel reactor that can achieve high absorption rates of CO2 at very low power consumption. The results show that more than 96.5% of CO2 can be removed using different combinations of operating conditions and reactor design configurations.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)