Article
Chemistry, Physical
Yongbo Yang, Linchao Dai, Xianfeng Liu, Zhibao Wang, Baisheng Nie
Summary: The changes in coal microstructures including functional groups, mineral compositions, and pore distribution were comprehensively investigated by using low-pressure CO2/N2 adsorption, X-ray diffraction, and Fourier transform infrared spectroscopy. The results showed that supercritical CO2 enhanced the micro and mesopores in coal while decreasing the macropores, thus enhancing the CO2 storage capacity. This study's findings are significant for assessing hydrocarbon recovery and CO2 trapping in coal reservoirs.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Mathematics, Interdisciplinary Applications
Qing Pan, Timon Rabczuk, Xiaofeng Yang
Summary: The study investigates the isogeometric analysis approach based on the extended Catmull-Clark subdivision for solving PDEs on surfaces, which combines subdivision surfaces with NURBS techniques to overcome major difficulties in isogeometric analysis. The theoretical results are confirmed through numerical experiments for solving multiple second-order PDEs, demonstrating the effectiveness and performance advantages of the proposed method when compared with the classical linear finite element method.
COMPUTATIONAL MECHANICS
(2021)
Article
Chemistry, Physical
Changyifan Ren, Zhiwei Ge, Guobiao Ou, Zhenhua Ren, Liejin Guo
Summary: The supercritical water partial oxidation (SCWPO) process for ethanol involves nine reactions to generate gas products including H-2, CO, CH4, and CO2. Dehydrogenation and pyrolysis of ethanol are the main ways to produce H-2 in the early stage, while the water-gas shift reaction has the most significant impact on hydrogen production in the later stage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Joseph R. L. Cousins, Brian R. Duffy, Stephen K. Wilson, Nigel J. Mottram
Summary: Motivated by the need for greater understanding of systems involving interfaces between different phases, this study provides a comprehensive theoretical description for a specific system involving a nematic liquid crystal, a solid substrate, and a passive gas. By considering the breaking of anchoring at regions adjacent to the contact lines, the study investigates the transitions between various equilibrium states, including complete wetting, partial wetting, and complete dewetting, and uncovers the presence of both continuous and discontinuous transitions as well as contact-angle hysteresis.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Thermodynamics
Lijing Bei, Zhiwei Ge, Changyifan Ren, Di Su, Zhenhua Ren, Liejin Guo
Summary: In this study, a numerical model was established for the supercritical water partial oxidation (SCWPO) reactor based on ethanol. The fluid flow, heat transfer, and gas products distribution in the reactor were analyzed, and the influence of different operating parameters was discussed. The results showed that the carbon gasification efficiency and gas yield increased with the wall temperature, ethanol concentration, and oxidant equivalent ratio. Lower feed inlet height and flow rate could extend residence time and improve reactor performance.
Article
Chemistry, Physical
Sang-Rak Sim, Dong-Woo Ryu
Summary: To prevent drastic climate change, it is necessary to reduce greenhouse gas emissions in all industrial sectors. This study focuses on measures to reduce greenhouse gas emissions in the cement industry, using a carbon utilization fixation technology that utilizes concrete slurry water. The results showed promising carbonation reactions, but further research is needed to identify reaction products in the supernatant water.
Article
Energy & Fuels
Xianfeng Liu, Chaolin Zhang, Baisheng Nie, Chengpeng Zhang, Dazhao Song, Tao Yang, Zhengtao Ma
Summary: Injection of CO2 into coal seams is a critical method for enhanced coalbed methane recovery and carbon sequestration. This study investigates the influence of supercritical CO2 saturation time on the mechanical properties and structural changes of coal. The results show that after interaction with supercritical CO2, the mechanical properties of coal are significantly altered, with reductions in compressive strength, elasticity modulus, and tensile strength. These changes are time-dependent and primarily occur within 9 days of saturation. Additionally, the porosity and pore specific surface area of coal increase with interaction time.
Article
Mathematics, Applied
Dharmendra Kumar, Jagmohan Tyagi
Summary: Lyapunov-type inequalities were established for a class of singular elliptic partial differential equations in this study, which were then used to derive lower bounds for the first eigenvalue of the associated equations. An attempt was also made to address a question posed by de Napoli and Pinasco in J. Funct. Anal. 270 (2016), no. 6, 1995-2018.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Thabet Abdeljawad, Awais Younus, Manar A. Alqudah, Usama Atta
Summary: The Laplace transformation is an important integral transform widely used in solving various types of differential equations. This study introduces the concept of fuzzy double Laplace transform and fuzzy conformable double Laplace transform (FCDLT). Basic properties of FCDLT are discussed and the solutions of fuzzy partial differential equations are obtained using the double Laplace approach. Numerical examples demonstrate the effectiveness and convenience of the proposed method for solving partial differential equations.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Thermodynamics
Lijing Bei, Zhiwei Ge, Changyifan Ren, Di Su, Fei Shang, Yu Wang, Liejin Guo
Summary: Supercritical water partial oxidation (SCWPO) is a promising technology for converting ethanol into hydrogen and energy efficiently. However, traditional SCWPO reactors have limitations in terms of wall material requirements and system efficiency. This numerical study explores the SCWPO of ethanol with auto-thermal operation, analyzing the effects of different parameters. The results show that increasing ethanol concentration, preheated water temperature, and reactor length can enhance the SCWPO efficiency. This study provides valuable insights for reactor scale-up and system optimization.
Article
Mechanics
Enbo Zhang, Toshinori Watanabe, Takehiro Himeno, Bofeng Bai
Summary: This paper investigates the sealing performance and leakage characteristics of the Scallop Damper Seal (SDS) in supercritical CO2 (S-CO2) turbomachinery. By comparing the flow fields of a labyrinth seal (LABY) and a full-partition pocket damper seal (FPDS), it is demonstrated that SDS has better leakage reduction performance for S-CO2. The results show that S-CO2 fluid expands and dissipates more energy in the SDS cavity, leading to a significant decrease in leakage flow rate (LFR). At a differential pressure of 5 MPa, SDS has a 36.6% and 54.4% lower LFR than LABY and FPDS, respectively.
Article
Chemistry, Applied
Ning Wei, Botian Hao, Donghai Xu, Xu Liu, Mingyan Ma, Yang Guo
Summary: This study investigated the pathways and kinetics of hydrogen production from indole gasification in supercritical water. The addition of an oxidant was found to enhance gasification efficiency and increase the yields of H2 and CO2.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chong Sun, Jianxin Liu, Jianbo Sun, Xueqiang Lin, Yong Wang
Summary: The initial corrosion behavior of X65 steel was studied in CO2-rich and H2O-rich environments with various impurities. It was found that X65 steel experiences more serious corrosion in the CO2-rich phase, with impurities playing a significant role in film evolution. Despite identical film compositions, the evolution and sedimentary state of corrosion products differ in the two environments.
Article
Engineering, Environmental
Shiyu Zhao, Cui Wang, Bin Bai, Hui Jin, Wenwen Wei
Summary: The study found that gasification of PS in supercritical water with CO2 can achieve a high carbon conversion efficiency. PS was hardly gasified at 400 degrees C, with the liquid composition changing as the temperature rose. In addition, it was observed that PS can react with CO2 to generate CO in CO2 atmosphere.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. A. Oyekanmi, H. P. S. Abdul Khalil, A. A. Rahman, E. M. Mistar, N. G. Olaiya, Tata Alfatah, Esam Bashir Yahya, Mariana Mariana, C. M. Hazwan, C. K. Abdullah
Summary: The study enhanced the properties of Euchema cottoni biopolymer films by incorporating cinnamon oil extract, resulting in improved morphology, mechanical, thermal, wetting, and antimicrobial properties. The hydrophobicity of the films increased as the concentration of cinnamon oil increased, leading to enhanced tensile strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Chemical
A. Douba, M. Genedy, E. N. Matteo, U. F. Kandil, J. Stormont, M. M. Reda Taha
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2017)
Article
Green & Sustainable Science & Technology
Moneeb Genedy, Usama F. Kandil, Edward N. Matteo, John Stormont, Mahmoud M. Reda Taha
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2017)
Article
Energy & Fuels
Craig M. Tenney, Thomas Dewers, Kuldeep Chaudhary, Edward N. Matteo, M. Bayani Cardenas, Randall T. Cygan
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2017)
Article
Multidisciplinary Sciences
Philippe F. Weck, Eunja Kim, Yifeng Wang, Jessica N. Kruichak, Melissa M. Mills, Edward N. Matteo, Roland J. -M. Pellenq
SCIENTIFIC REPORTS
(2017)
Article
Construction & Building Technology
Edward N. Matteo, Bruno Huet, Carlos F. Jove-Colon, George W. Scherer
CEMENT AND CONCRETE RESEARCH
(2018)
Article
Green & Sustainable Science & Technology
Thomas Dewers, Peter Eichhubl, Ben Ganis, Steven Gomez, Jason Heath, Mohamad Jammoul, Peter Kobos, Ruijie Liu, Jonathan Major, Ed Matteo, Pania Newell, Alex Rinehart, Steven Sobolik, John Stormont, Mahmoud Reda Taha, Mary Wheeler, Deandra White
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2018)
Article
Green & Sustainable Science & Technology
Edward N. Matteo, George W. Scherer
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2012)
Article
Chemistry, Physical
Susan J. Altman, Behdad Aminzadeh, Matthew T. Balhoff, Philip C. Bennett, Steven L. Bryant, M. Bayani Cardenas, Kuldeep Chaudhary, Randall T. Cygan, Wen Deng, Thomas Dewers, David A. DiCarlo, Peter Eichhubl, Marc A. Hesse, Chun Huh, Edward N. Matteo, Yashar Mehmani, Craig M. Tenney, Hongkyu Yoon
JOURNAL OF PHYSICAL CHEMISTRY C
(2014)
Article
Energy & Fuels
Serafin Garcia Fernandez, Edward N. Matteo, Mahmoud Reda Taha, John C. Stormont
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2019)
Article
Construction & Building Technology
Moneeb Genedy, Edward N. Matteo, Michael Stenko, John C. Stormont, Mahmoud Reda Taha
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2019)
Article
Energy & Fuels
John C. Stormont, Serafin Garcia Fernandez, Mahmoud R. Taha, Edward N. Matteo
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2018)
Article
Computer Science, Interdisciplinary Applications
Steven P. Gomez, Steve R. Sobolik, Edward N. Matteo, Mahmoud Reda Taha, John C. Stormont
COMPUTERS AND GEOTECHNICS
(2017)
Proceedings Paper
Chemistry, Applied
Moneeb Genedy, John Stormont, Edward Matteo, Mahmoud Reda Taha
12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12
(2014)