Article
Energy & Fuels
Nguyen Van Duc Long, Dong Young Lee, Choongyong Kwag, Young Mok Lee, Sung Won Lee, Volker Hessel, Moonyong Lee
Summary: This study developed an effective sea-based CO2 capture, compression, and liquefaction technology for a 3000 kW diesel engine. By using multiple mixed solvents and optimizing the configuration, the CO2 removal efficiency was improved. The adoption of a square shape design saved space, while heat integration was applied to enhance performance.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Xuewen Cao, Jian Yang, Yue Zhang, Song Gao, Jiang Bian
Summary: A novel cascade nitrogen expansion re-liquefaction process is proposed in this study to reduce energy consumption by optimizing heat exchange efficiency, and compared with the parallel expansion process. The designed process has lower energy consumption, higher exergy efficiency, and saves total costs compared to the reference process.
Article
Chemistry, Multidisciplinary
Yun-Yang Lee, Nalinda P. Wickramasinghe, Ruth Dikki, Darrell L. Jan, Burcu Gurkan
Summary: This study developed a facilitated transport membrane (FTM) using functionalized ionic liquid (IL) and poly(ionic liquid) (PIL) carriers to separate CO2 from air. The results showed that the membrane achieved efficient CO2 separation under certain conditions. Additionally, the study analyzed the effects of carrier binding to CO2, ion diffusivities, and gel glass transition temperature on membrane performance.
Article
Green & Sustainable Science & Technology
Muhammad Zubair Shahid, Jin-Kuk Kim
Summary: This study evaluates multiple cases of the CO2 absorption process using MEA or MDEA solvents. A novel design for the simultaneous removal of CO2 from the flue gas of a reformer and the PSA inlet gas stream is proposed and its techno-economic benefits are examined. The results show that the new system based on the sequential reuse of MEA solvent is the most economic process to remove 99% of total plant CO2.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Jonghun Lim, Jehun An, Hyungtae Cho, Junghwan Kim
Summary: Many countries discharge desalination wastewater into the ocean, causing pollution, ecosystem destruction, and economic losses. This study developed a process to capture and utilize NOx, SOx, and CO2 from desalination wastewater using NH3. The proposed process demonstrated high economic feasibility, achieving significant reductions in total annualized costs.
Article
Thermodynamics
Hossein Farajollahi, Siamak Hossainpour
Summary: This study evaluates the effect of co-combustion of woody biomass and coal on the techno-economic performance of a 300 MWth in-situ gasification chemical looping combustion power plant. The results show that increasing biomass share can enhance the CO2 capture efficiency and coal conversion, achieving negative CO2 emissions with high biomass share. The integrated systems of supercritical CO2 cycle and Organic Rankine cycle improve the net electrical efficiency of the plant.
Article
Environmental Sciences
Javad Asadi, Pejman Kazempoor
Summary: This study aims to develop optimal membrane-based carbon capture systems to enhance the sustainability of fossil-fuel power plants. The multi-stage membrane process is modeled and optimized, and the effects of operating and design parameters are investigated. The results show a significant decrease in CO2 capture cost and enhanced CO2 removal with increasing CO2 concentration in the feed gas.
Article
Thermodynamics
Chong Wei Ong, Cheng-Liang Chen
Summary: This study focuses on the investigation of a CO2-capturing oxy-combustion CO2 power system integrated with LNG cold energy utilization, demonstrating high net power output, energy efficiency, CO2 recovery rate, and CO2 capture purity.
Article
Engineering, Chemical
Juyoung Oh, Rahul Anantharaman, Umer Zahid, PyungSoo Lee, Youngsub Lim
Summary: This study introduces an onboard membrane carbon capture and liquefaction system for LNG-fueled ships to meet the IMO's 2050 greenhouse gas reduction targets. By optimizing selectivity and permeance, energy consumption can be reduced and major equipment size can be decreased.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Marine
Jun-Seong Kim, Do-Yeop Kim
Summary: This paper proposes novel BOG re-liquefaction systems combined with the fuel gas supply system for LNG-fueled ships, utilizing LNG cold energy in the BOG stream and N-2 reverse Brayton cycle. The proposed systems were simulated and optimized, showing significant improvement in energy consumption, exergy efficiency, and total annual costs compared to existing systems.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Amirhossein Hasanzadeh, Mahsa Mehrara, Milad Irani, Ata Chitsaz, Kiyan Parham
Summary: CO2 capture technologies can help reduce pollutant emissions and create a cleaner environment. This study introduces a novel hybrid power generation system that uses biomass gasifiers, gas turbines, an ORC cycle, EMAR technology for CO2 capture, and a CO2 compressor for storage. The main objective is clean production, where a significant amount of energy is produced with almost no CO2 emissions using EMAR CO2 capture technology. An energy-based model is presented and validated, and two scenarios are proposed to assess system feasibility and optimization using a Genetic algorithm.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Thermodynamics
Wenxing Liang, Zeting Yu, Shuzhan Bai, Guoxiang Li, Daohan Wang
Summary: This study proposes a multi-generation system based on solid oxide fuel cells (SOFC), which integrates organic Rankine cycle and transcritical carbon dioxide cycle to achieve near-zero emissions. A liquefied natural gas (LNG) cold energy utilization system is introduced to realize CO2 condensation and capture. The system demonstrates cooperative production of energy and matter, with high thermal efficiency, net electrical efficiency, and exergy efficiency. Exergy analysis reveals the most significant losses occur in the SOFC top cycle. Parameters analysis shows that different operating conditions affect the system's electrical efficiency and exergy efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Marine
Jinkwang Lee, Younseok Choi, Jungho Choi
Summary: This study proposed an integrated design of an NH3 fuel supply system and a re-liquefaction system for an ocean-going NH3-fueled ship. The study found that it is recommended to introduce the re-liquefaction system to the target ship. Furthermore, based on NPV analysis and LCC, NH3 fuel is economically feasible.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Bo-Ping Ren, Yi-Peng Xu, Yu-Wei Huang, Chen She, Bo Sun
Summary: This paper presents a methanol production process that is highly thermodynamically efficient and cost-effective. The process utilizes CO2 captured from power plant flue gas to enhance stoichiometry, methanol efficiency, carbon efficiency, and CO2 conversion. The study includes sensitivity analysis, technical, economic, and environmental analyses, as well as comparison with previous studies. The optimal steam-to-methane ratio is found to be 3.75, and the optimum CO2 utilization flow rate is 140 kmol/h. From an economic perspective, the total annual cost is 11,799,484 USD, with a production cost rate of 0.1 $/kg. The environmental analysis reveals a total net CO2 emission of 6580.64 kg/h, with 0.41 kg CO2 emitted per kg of methanol produced.
Article
Energy & Fuels
Calin-Cristian Cormos
Summary: The study evaluates the techno-economic performances of calcium and magnesium-based sorbents used in high temperature solid looping cycles for CO2 capture in fossil power generation. The results indicate that carbonate looping systems in solid fossil fuel super-critical plants have lower carbon capture energy penalty compared to reactive gas-liquid absorption. Additionally, chemical absorption systems in natural gas combined cycle plants have higher net power efficiency compared to calcium and magnesium looping systems.
Article
Thermodynamics
Dhinesh Thanganadar, Francesco Fornarelli, Sergio Camporeale, Faisal Asfand, Jonathon Gillard, Kumar Patchigolla
Summary: Integration of thermal energy storage with CSP plant can stabilize energy generation; sCO(2) cycles reduce cost and design guidelines aid in optimal cycle selection.
Article
Environmental Sciences
Kalu Samuel Ukanwa, Kumar Patchigolla, Ruben Sakrabani
Summary: This study focuses on the reuse of resultant residues from thermal processes and the economic optimization of waste revaluation. The economic analysis and process optimization were conducted using simulation software and statistical tools, providing the return on investment and payback period for different processes. The study also evaluated the potential of palm waste ash as an alternative to chemical fertilizers and confirmed its effectiveness. The results suggest that utilizing such waste in the activated carbon market is a viable business option.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Chemistry, Applied
Shuang Yue, Chunbo Wang, Yulin Huang, Ziyang Xu, Jiaying Xing, Edward J. Anthony
Summary: Oxy-steam combustion is a promising technology for reducing CO2 emissions. This study investigated the transformation and release of nitrogen under oxy-steam conditions, revealing that char prepared in a N-2/H2O atmosphere has higher nitrogen content compared to a N-2 atmosphere. The presence of OH radicals inhibits the transformation of N-Q to N-6 and promotes the conversion of N-6 to N-5, ultimately leading to lower emissions of HCN and NH3 under N-2/H2O conditions.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiaying Xing, Chunbo Wang, Yulin Huang, Shuang Yue, Edward J. Anthony
Summary: This study investigated the effect of W and Mo modification on arsenic adsorption over Cu/gamma-Al2O3 catalyst. Results showed that W and Mo modification improved the NO conversion activities at low temperatures and reduced the arsenic adsorption on Cu/gamma-Al2O3 catalyst. W modification had a stronger promotion effect on arsenic resistance compared to Mo modification, and the proportion of As5+ on the W-Cu/gamma-Al2O3 surface was larger than that on the Mo-Cu/gamma-Al2O3 surface. Theoretical simulations revealed that Al2O3 adsorption on Mo-Cu/gamma-Al2O3 surface was stronger than that on W-Cu/gamma-Al2O3 surface.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Shuang Yue, Chunbo Wang, Ziyang Xu, Dong Wang, Fei Zheng, Edward J. Anthony
Summary: This study compared NO emissions during oxy-steam and air combustion of coal char, emphasizing the role of H2O and its resulting radicals in NO formation and reduction reactions. High concentrations of H2O promote the formation of OH radicals and hydroxyl groups during oxy-steam combustion, affecting NO formation and reduction reactions and ultimately NO emissions.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Patricia Palenzuela, Lidia Roca, Faisal Asfand, Kumar Patchigolla
Summary: The European Commission's new challenge is to limit water consumption in Concentrating Solar Power (CSP) plants, with hybrid cooling systems seen as a potential solution. Experimental evaluation of a hybrid cooling pilot plant showed significant water savings of up to 67% at high ambient temperatures and 80% thermal load. Optimal operating strategies achieving a tradeoff between low water and electricity consumption were identified, with parallel configuration being the most efficient in most cases.
Article
Energy & Fuels
Liang Chen, Yuan Fang, Chunbo Wang, Yajin Huo, Wenjing Wang, Edward J. Anthony
Summary: This study investigates the mechanism and effects of H2O on CaO sulfation through density functional theory and experiments. The presence of H2O decreases the energy barrier for Ca2+ diffusion on the CaSO4 surface, enhances the outward diffusion of Ca2+, and improves the adsorption of SO2 on a CaSO4 surface.
Article
Thermodynamics
Vivek Narisetty, Sanjay Nagarajan, Siddharth Gadkari, Vivek Ranade, Jingxin Zhang, Kumar Patchigolla, Amit Bhatnagar, Mukesh Kumar Awasthi, Ashok Pandey, Vinod Kumar
Summary: In this study, bread waste was used as a feedstock for fermentative production of ethanol and biomethane. Glucose was obtained by acid and enzymatic saccharification of bread waste, and then fermented into ethanol. The solid residue after fermentation was subjected to anaerobic digestion to produce biomethane. The study showed that bread waste is a promising feedstock for sustainable biofuel production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Hisham Al Baroudi, Ryota Wada, Masahiko Ozaki, Kumar Patchigolla, Makoto Iwatomi, Kengi Murayama, Toru Otaki
Summary: This study constructed a cryogenic test facility to handle CO2 near the triple point, replicating emergency release coupler principles during shutdown. Findings showed a rapid discharge of liquefied CO2 upon separation of the test vessel, with dispersion in a 'tulip' shape and formation of CO2 solids, posing risks to surrounding personnel.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Energy & Fuels
Xuan Tao, Dhinesh Thanganadar, Kumar Patchigolla
Summary: This paper investigates single-stage ammonia/water absorption chillers, develops a numerical model based on heat exchanger performance, and validates the model with experimental data. The detrimental effects of refrigerant impurity under different operating conditions are analyzed quantitatively, and the thermodynamic performances of a basic cycle and three advanced cycles for sub-zero refrigeration are compared.
Article
Thermodynamics
Shuang Yue, Chunbo Wang, Edward J. Anthony
Summary: A detailed investigation into the intrinsic kinetics mechanisms for the catalytic reduction of NO by Na-loaded char was conducted using DFT and TST calculations. The results revealed the essential role of the catalytic active center -O -Na in the interaction between NO and carbonaceous surface, with sensitivity to temperature and NO-to-CO stoichiometric ratio. Inspired by the findings, a conceptual approach for improving the catalytic performance of Na on NO reduction was proposed and shown to be theoretically feasible.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Chemistry, Multidisciplinary
Robin Abu, Kumar Patchigolla, Nigel Simms, Edward John Anthony
Summary: The use of hydrocarbon fuels and natural gas flaring is increasing due to population growth and rising standards of living. This paper aims to establish a framework and management tool to reduce regular gas flaring in Nigeria. The tool incorporates techno-economic analysis to assist operators and investors in making more profitable investment decisions.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Ke Wang, Jie Chen, Tianyu Wang, Jie Hong, Pengfei Zhao, Edward J. Anthony
Summary: Capture and conversion of CO2 from optimal scenarios into fuels or chemicals provide a viable solution to combat climate change. The proposed synergistic integration of catalytic calcium-looping gasification of biochar can capture and in situ convert CO2. Experimental tests and characterizations showed that the mixture of limestone and K2CO3-impregnated biochar can enhance decarbonation kinetics and CO yield, maintaining stable CO2 conversion at lower temperatures. The process demonstrated practical scalability and cost-effectiveness, opening a unique direction for net-negative emission.
CHEMICAL ENGINEERING JOURNAL
(2023)
Proceedings Paper
Energy & Fuels
Christopher Sansom, Kumar Patchigolla, Kranthi Jonnalagadda, Peter King
Summary: This article describes the design of a large-scale thermal seawater desalination demonstrator unit for arid locations with a medium-to-high direct normal irradiance (DNI). The majority of thermal energy is provided by a conventional parabolic trough field with a capacity of 4MWt. The desalination sub-system consists of a 3-effect multi-effect distillation (MED), with the first stage being a large 20-meter diameter glass and steel-structured geodesic transparent dome. The thermal energy is supplemented by direct sunlight transmitted through the dome and by a group of small heliostats focused on the dome. The prototype is currently under construction in Neom, Saudi Arabia.
SOLARPACES 2020 - 26TH INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS
(2022)