Article
Chemistry, Multidisciplinary
Seoni Kim, Michael P. Nitzsche, Simon B. Rufer, Jack R. Lake, Kripa K. Varanasi, T. Alan Hatton
Summary: In recent years, the ocean has been recognized as a global reservoir for CO2. An asymmetric electrochemical system utilizing bismuth and silver electrodes is reported as an effective means of capturing and removing CO2 from ocean water. With two silver-bismuth systems operating in a cyclic process, CO2 can be continuously removed from simulated ocean water with low energy consumption and high electron efficiency.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Till Strunge, Phil Renforth, Mijndert Van der Spek
Summary: Integrated techno-economic modelling suggests that the use of CO2 mineralisation in the cement industry can be profitable and reduce CO2-equivalent emissions by up to a third. This method requires the resulting products to be used in construction and meet the eligibility for emission certificates. The transport of minerals and the composition of the products are also crucial factors.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Review
Chemistry, Multidisciplinary
Xiang Yu, Carmen Otilia Catanescu, Robert E. Bird, Sriram Satagopan, Zachary J. Baum, Leilani M. Lotti Diaz, Qiongqiong Angela Zhou
Summary: Technological and medical advances have led to increased life expectancies, but also contributed significantly to CO2 emissions over the last three decades. The United Nations aims to achieve net zero emissions by 2050, which requires global efforts in developing new materials and processes to selectively remove CO2 from the atmosphere.
Review
Chemistry, Multidisciplinary
Xiang Yu, Carmen Otilia Catanescu, Robert E. Bird, Sriram Satagopan, Zachary J. Baum, Leilani M. Lotti Diaz, Qiongqiong Angela Zhou
Summary: Technological and medical advances have led to increased life expectancies, but also significant CO2 emissions over the past three decades. The UN has set a goal to achieve net zero CO2 emissions by 2050, which requires global collaboration. Novel materials and processes can be used to capture and sequester CO2 from the atmosphere, reducing dependence on fossil fuels. This review provides a systematic analysis of the approaches taken by scientists and industrialists to restore carbon balance, highlighting the latest trends and challenges.
Article
Engineering, Environmental
Hesam Ostovari, Leonard Mueller, Jan Skocek, Andre Bardow
Summary: The study discusses the potential of achieving carbon neutrality in the cement industry using CO2 mineralization. By utilizing two mechanisms to reduce the carbon footprint, combining CO2 mineralization and cement production could decrease the carbon footprint by 44% to 85%.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Patrick Brandl, Mai Bui, Jason P. Hallett, Niall Mac Dowell
Summary: Absorption-based separation processes are crucial for deep decarbonisation, but the anticipated cost reduction has not been achieved. Previous research focused on developing novel aqueous blends of amines, which failed to address the issue of high water content in solvents. This study presents a thought-experiment using a hypothetical solvent to determine the limit of cost reduction.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Chemistry, Multidisciplinary
Chenxi Ji, Shuai Yuan, Mitchell Huffman, Mahmoud M. El-Halwagi, Qingsheng Wang
Summary: This study proposed a post-combustion carbon capture solution for LNG tankers, integrating ship engine process modeling with chemical absorption/desorption process modeling techniques to reduce carbon emissions.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Kyeongjun Seo, Adhika P. Retnanto, Jorge L. Martorell, Thomas F. Edgar, Mark A. Stadtherr, Michael Baldea
Summary: Carbon capture and storage is an effective method to reduce CO2 emissions during the transition to zero-carbon power generation technologies. The integration of post-combustion carbon capture systems with fossil fuel power plants operating at variable load can offer cost savings by taking advantage of fluctuating electricity prices. This paper explores the optimal flexible operation of a carbon capture system using ionic liquids as a chemical absorption solvent, connected to a natural gas combined cycle power plant under high variable renewable power generation rates, and shows significant cost savings compared to inflexible operation.
COMPUTERS & CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Le Quynh Hoa, Ralph Baessler, Dirk Bettge, Enrico Buggisch, Bernadette Nicole Schiller, Matthias Beck
Summary: Representative low-cost materials were embedded in mortar to mimic the casing-mortar interface in injection wells. Two types of cement were investigated for their corrosion resistance, and exposure tests revealed unexpected corrosion types on steel surfaces. Surface analysis and element mapping were used to trace chloride intrusion and corrosion process on exposed specimens.
Article
Chemistry, Multidisciplinary
Jotheeswari Kothandaraman, Johnny Saavedra Lopez, Yuan Jiang, Eric D. Walter, Sarah D. Burton, Robert A. Dagle, David J. Heldebrant
Summary: The integrated carbon capture and conversion process successfully converts captured CO2 into hydrocarbons, mainly methane, using a water-lean solvent and a heterogeneous Ru catalyst. Technoeconomic analysis shows that this process can improve thermal efficiency, reduce total capital investment, and lower the selling price of synthetic natural gas, highlighting its energetic and economic benefits.
Article
Biotechnology & Applied Microbiology
Patrice Perreault, Nithin B. Kummamuru, Arturo Gonzalez Quiroga, Silvia Lenaerts
Summary: The deployment of CCUS plants faces challenges due to high costs and various factors contributing to the slow roll-out of CCS projects. However, support from the financial sector, governments, and public participation are crucial for the success of these technologies.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Eunseon Jang, Bernd Wiese, Peter Pilz, Sebastian Fischer, Cornelia Schmidt-Hattenberger
Summary: Gypsum precipitation in groundwater wells during CO2 injection can pose a potential clogging hazard. The precipitation is primarily caused by changes in water saturation due to CO2 injection and the release of Ca2+ ions from dolomite dissolution. Gypsum precipitation decreases with increasing temperature but increases with increasing partial CO2 pressure.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Chemistry, Physical
Christopher James Fetrow, Cameron Carugati, Xiao-Dong Zhou, Shuya Wei
Summary: This review provides an overview of the fundamental electrochemistry and mechanisms of metal-CO2 batteries, including material selection, design considerations, electrochemical charge and discharge mechanisms, and catalyzed behaviors. Understanding the underlying electrochemistry of metal-CO2 batteries can lead to the development of battery technologies applicable to a wide range of carbon capture and energy storage applications.
ENERGY STORAGE MATERIALS
(2022)
Article
Multidisciplinary Sciences
Hao Chen, Hang Dong, Zhongyu Shi, Arup K. SenGupta
Summary: Direct air capture (DAC) is essential for achieving net-zero greenhouse gas emissions by 2050. A hybrid sorbent with polyamine-Cu(II) complex is presented, enabling over 5.0 mol of CO2 capture/kg sorbent, significantly higher than most DAC sorbents reported. The sorbent can be thermally desorbed at low temperatures and seawater can be used as a regenerant, simultaneously sequestering the desorbed CO2 as harmless alkalinity.
Article
Engineering, Environmental
Jose Antonio Garcia, Maria Villen-Guzman, Jose Miguel Rodriguez-Maroto, Juan Manuel Paz-Garcia
Summary: This paper critically reviews different CO2 capture engineering pathways and technologies, providing technical information to select the most appropriate technology for specific processes and different carbon capture pathways. Additionally, it analyzes the cost of CO2 capture technologies and their future development trends.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Marine
Erinc Dobrucali, Selma Ergin
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2019)
Article
Engineering, Marine
Sertac Bulut, Selma Ergin
Summary: The effects of geometrical parameters on the hydroacoustic characteristics of flow over rectangular, square, and circular cylinders were investigated through numerical analyses and experiments. The results show that the hydroacoustic characteristics of the cylinders are significantly different due to differences in shear layer separation, reattachment mechanism, and disturbance intensity.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2021)
Article
Engineering, Marine
Mehmet Akman, Selma Ergin
Summary: The study focuses on using an ORC waste heat recovery system to increase the thermal efficiency of ship power generation system and save CO2 emissions. Engine exhaust gas is used as the waste heat source, R152a is the selected working fluid, and performance optimization is done using a genetic algorithm. Results indicate a significant improvement in energy efficiency with the potential for substantial savings in CO2 emissions.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Thermodynamics
Sertac Bulut, Selma Ergin
Summary: This study investigates the effects of geometric parameters on the hydro-acoustic characteristics of flow over cylinders with circular, square, and rectangular cross sections through numerical analyses and acoustic experiments. The results show that the hydro-acoustic characteristics are greatly influenced by the shear layer separation, reattachment mechanism, and intensity disturbances. The noise spectrum strongly depends on the cross-sectional geometry, with increasing side ratio leading to a narrower spectrum and increasing main peak frequency. Furthermore, at constant Reynolds numbers, the broadband noise level and maximum sound pressure level decrease with decreasing aspect ratio for cylinders with circular cross sections. The numerical predictions are in good agreement with the experimental measurements.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2023)
Article
Energy & Fuels
Serdar Mete, Selma Ergin
Summary: This study investigates the effects of a new drive mechanism on the performance parameters of the alpha-type kinematic Stirling engine. Experimental and theoretical research is conducted, and the mathematical model is validated with experimental results. The torque values for different piston forces are compared with those of the conventional slider-crank mechanism, showing an increase of up to 3.66 times with the new drive mechanism.
INTERNATIONAL JOURNAL OF SUSTAINABLE ENERGY
(2022)
Article
Thermodynamics
Talat Goekcer Canyurt, Selma Ergin, Hande Bezci Zeren, Ismail Hakki Savci
Summary: This study investigates the formation and evaporation process of liquid films in EATS systems, finding that the liquid film formed in stagnant flow regions poses the highest risk, and deposit formation occurs where the liquid film in stagnant regions does not evaporate.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Marine
Engin Guler, Selma Ergin
Summary: This study investigates the integration of cooling, heating, and power (CHP) systems with carbon capture and storage (CCS) for LNG carriers. Different integration levels were simulated and optimized using Aspen HYSYS and genetic algorithm. Results show that using CCS system is more cost-effective than paying EU carbon tax. Integrating BO-NG and CO2 liquefaction cycles can significantly reduce the total life cycle cost of the CCS system. Selecting working pressure is critical for the liquefaction process. ORC system reduces energy penalty but increases the total life cycle cost due to its initial cost and low efficiency.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Marine
Sertac Bulut, Selma Ergin
Summary: The investigation of hydro-acoustic characteristics of tandem cylinders is important for reducing noise levels in various engineering applications. The study found that as the distance ratio increases, the main peak spectrum becomes narrower and its width decreases, while the main peak frequency increases. The maximum sound pressure level reaches its peak value at a critical distance ratio of 3.0, with a significant increase of approximately 6 dB between distance ratios of 1.5 and 3.0, followed by a decrease of approximately 1 dB between distance ratios of 3.0 and 6.0.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2023)
Article
Engineering, Marine
Selma Ergin, Luigia Mocerino, Franco Quaranta
Summary: The study focuses on investigating ship emissions in ports, aiming to create new techniques for calculating, measuring, and validating emissions, and finding solutions to reduce the impact of large ships on limited space.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2023)
Article
Engineering, Marine
Mehmet Akman, Selma Ergin
Summary: The Organic Rankine Cycle (ORC) is a promising system for waste heat recovery from internal combustion engines. This study analyzes the thermodynamic, economic, and environmental aspects of a water-driven Waste Heat Recovery System (WHRS) based on organic Rankine cycle for a marine engine integrated with exhaust gas recirculation (EGR) system. Different working fluids with low global warming potential were evaluated, and R236ea was found to be the most suitable for the ORC WHRS. The overall thermal efficiency of the power generation system could be increased by about 2.8%.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART M-JOURNAL OF ENGINEERING FOR THE MARITIME ENVIRONMENT
(2023)
Article
Thermodynamics
Koray Sahin, Selma Ergin
Summary: The study investigates laminar free convection heat transfer in a confined space filled with high viscosity fluid for different heating systems and coil tube arrangements within a range of Rayleigh numbers. The results show significant effects of horizontal and vertical distances between coil tubes on the heat transfer characteristics at the same Rayleigh number.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Engineering, Marine
Sertac Bulut, Selma Ergin
Summary: This study numerically investigated the effects of temperature, salinity, and fluid type on the acoustic characteristics of turbulent flow around a circular cylinder. The results showed that the DES-FWH hybrid method was suitable for aero- and hydro-acoustic analysis, with water medium having higher SPLT and OASPL compared to the air medium.
JOURNAL OF MARINE SCIENCE AND APPLICATION
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
K. Sahin, S. Ergin
SUSTAINABLE DEVELOPMENT AND INNOVATIONS IN MARINE TECHNOLOGIES
(2020)
Proceedings Paper
Green & Sustainable Science & Technology
S. Bulut, S. Ergin
SUSTAINABLE DEVELOPMENT AND INNOVATIONS IN MARINE TECHNOLOGIES
(2020)