Article
Engineering, Chemical
Umesh Pandey, Anders Runningen, Ljubisa Gavrilovic, Erik A. Jorgensen, Koteswara R. Putta, Kumar R. Rout, Erling Rytter, Edd A. Blekkan, Magne Hillestad
Summary: The detailed kinetic model developed in this study accurately describes the consumption of key components and product distribution in the Fischer-Tropsch synthesis over a commercial catalyst, incorporating a water-assisted CO dissociation mechanism and a novel approach to product distribution modeling. The model parameters are optimized against experimental data under various process conditions, showing a good fit with literature reported values. The model can accurately capture the effects of water and other process variables on the kinetics and product distribution, crucial for the design and optimization of Fischer-Tropsch reactors.
Article
Engineering, Multidisciplinary
Hany S. EL-Mesery, Nermeen M. Tolba, Reham M. Kamel
Summary: This study investigated the application of different airflow distribution systems in convection hot-air dryers for grape drying. The results showed that horizontal dryers had shorter drying times and higher thermal efficiency compared to vertical dryers. Additionally, the logarithmic model was found to accurately evaluate the drying curve for grapes in different convection dryers.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
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
Zijian Li, Jie Chen, Yiming Cheng, Jingyu Ran, Changlei Qin
Summary: CO2 mineralization combined with goaf backfilling is an effective method for alkaline solid waste recycling and CO2 emission reduction. This study focuses on the kinetics of direct aqueous carbonation of carbide slag and its mixtures with iron tailing. A kinetic model based on the two-film theory is used to examine the carbonation behavior, and the impact of operation parameters is assessed. The results provide valuable insights into the microscale carbonation mechanism of mixed solid waste and offer theoretical support for industrial applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Construction & Building Technology
Songhui Liu, Peiliang Shen, Dongxing Xuan, Long Li, Adebayo Sojobi, Baojian Zhan, Chi Sun Poon
Summary: The liquid-solid carbonation process proved to be more efficient than the 24-hour gas-solid pressurized carbonation method in enhancing the properties of recycled concrete aggregates (RCA) and the resulting recycled aggregate concrete (RAC). The improved performance of RAC was attributed to the formation of additional mono-carbonate (Mc) and C?S?H gel at the interface between the liquid-solid carbonated RCA and the new cement pastes.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Ecology
Lukas Gabor, Walter Jetz, Muyang Lu, Duccio Rocchini, Anna Cord, Marco Malavasi, Alejandra Zarzo-Arias, Vojtech Bartak, Vitezslav Moudry
Summary: The performance of species distribution models (SDMs) is affected by analysis grain and positional error of species occurrences. Coarsening the analysis grain to compensate for positional error does not improve model performance.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Green & Sustainable Science & Technology
Giovanna Lovato, Adam Kovalovszki, Merlin Alvarado-Morales, Arnaud Tristan Arjuna Jeglot, Jose Alberto Domingues Rodrigues, Irini Angelidaki
Summary: Bioaugmentation is a promising method to improve the performance of sub-optimal anaerobic digestion processes and recover methane production. This study implemented a model with bioaugmentation functionalities for the dynamic microbiological study of augmented anaerobic systems. Simulation results showed that bioaugmentation will result in process improvement when specialized hydrogenotrophs are used.
Review
Construction & Building Technology
Tong Zhang, Meng Chen, Yuting Wang, Mingzhong Zhang
Summary: CO2 mineralisation by recycled concrete is an innovative method to improve the sustainability of concrete products. This review provides a comprehensive overview of the carbonation mechanisms, microstructure, and mechanical properties of concrete containing carbonated recycled concrete fines and aggregates. It highlights the chemistry-microstructure-property relationships and emphasizes the benefits of using carbonated recycled aggregates in enhancing the mechanical properties of concrete. Future research opportunities for developing low-carbon concrete with recycled concrete as a carbon sink are also discussed.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Physical
P. Kazempoor, J. Asadi, R. J. Braun
Summary: This study addresses the challenges in modeling solid oxide electrolysis cells (SOECs) with feed gases containing low steam-to-CO2 concentration ratios. The common approach of neglecting the CO2 electrochemical reduction reaction in SOEC modeling is validated against experimental results. The validation results show that the model deviation with experimental data increases at certain current densities. It is also shown that when the steam flow supplied to the cell is high enough to support the water-gas shift reaction, the electrochemical reaction involving CO2 can be neglected.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Qidong Xu, Meng Ni
Summary: A 2D numerical model was developed to study a tubular direct methanol SOFC, with parameters such as temperature, thickness, and length having significant effects on performance. Increasing temperature enhances cell performance, while other parameters also play important roles in optimizing SOFC performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Jianan Tang, Xiao Geng, Dongsheng Li, Yunfeng Shi, Jianhua Tong, Hai Xiao, Fei Peng
Summary: Developing a machine learning algorithm RCWGAN-GP that predicts the microstructure of materials under new processing conditions, improving prediction accuracy significantly and demonstrating great potential.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Artur Bieniek, Markus Reinmoeller, Felix Kuester, Martin Graebner, Wojciech Jerzak, Aneta Magdziarz
Summary: Pyrolysis of waste organic fraction is crucial for meeting future energy demand and reducing waste. This study investigates the kinetic properties of pyrolysis reactions of brewery spent grain and medium-density fiberboard. The results provide a global equation for the one-step pyrolysis reaction and estimate the activation energy and reaction order for both materials.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Thermodynamics
Ming Liu, Zhongjie Shen, Jianliang Xu, Qinfeng Liang, Haifeng Liu
Summary: The study investigated the effect of molten slag covered on particle surface on mass transfer at high temperatures, analyzed the in-situ gasification process of different char particles, and proposed a reaction model for predicting carbon conversion of high ash content coal chars. The predicted carbon conversion of the proposed new model showed ideal agreement with the experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Environmental Sciences
A. Taghavi Golsefidi, H. Ale Ebrahim, S. M. M. Nouri
Summary: In this study, the changes in pore size distribution during lime carbonation reaction were modeled using a random pore model based on a population balance for the first time. The predicted lime pore size distribution changes during carbonation reaction showed good agreement with experimental data, and the conversion-time profile for calcium oxide carbonation reaction was accurately predicted. This study is important for examining the behavior of calcium oxide as an important engineering material for environmental pollution control systems.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Andreas M. Bremen, Tobias Ploch, Adel Mhamdi, Alexander Mitsos
Summary: Mineral carbonation is a promising method for sequestering large amounts of carbon dioxide and producing value-added substitutes, with dynamic models playing a crucial role in understanding carbonation reaction mechanisms. Through simulations, the study was able to quantify the influences of key process conditions on the reaction kinetics.
CHEMICAL ENGINEERING JOURNAL
(2021)
