Review
Energy & Fuels
P. C. Lemaire, A. Alenzi, J. J. Lee, E. J. Beckman, R. M. Enick
Summary: The article discusses various types of CO2 thickeners, including high molecular weight associating random copolymers and methods involving the introduction of cosolvents. Potential candidates for CO2 direct thickeners in the future include novel nonfluorous associating CO2-philic oligomers and highly CO2-philic phosphate esters that remain dissolved in CO2 after cross-linking.
Article
Chemistry, Multidisciplinary
Hye-Seung Lee, Jinhyung Cho, Young-Woo Lee, Kun-Sang Lee
Summary: The study demonstrates that impurities in CO2 streams can have an impact on enhanced oil recovery and carbon capture and storage performance. Different types and concentrations of impurities affect the maximum miscibility pressure (MMP) of the oil-gas mixture, leading to decreased displacement efficiency and reduced oil density.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Hamad Alkharraa, Karl-Heinz Wolf, Abdulrahman Alquraishi, Ridha Al Abdrabalnabi, Mohamed Mahmoud, Pacelli Zitha
Summary: This research evaluates the performance of CO2 injection in tight reservoirs and finds that secondary miscible CO2 injection provides the highest displacement efficiency and oil recovery. NMR analysis findings are in line with core-flood experiments results, showing a strong positive correlation.
Article
Energy & Fuels
Yueliang Liu, Zhenhua Rui, Tao Yang, Birol Dindoruk
Summary: This study proposes the use of propanol as a novel cosolvent to enhance the efficiency of CO2 flooding for heavy oil recovery and CO2 storage in oil reservoirs. The results show that propanol significantly reduces the viscosity of heavy oil and outperforms propane in terms of oil recovery from medium-permeability cores. In addition, propanol allows for higher CO2 storage in oil reservoirs compared to propane, making it a suitable agent for CO2 sequestration.
Article
Chemistry, Multidisciplinary
Jinfa Zhang, Yingzhu Guan, Ting Li, Guojun Yin
Summary: The solubility of CO2 in water-bearing crude oil is crucial for crude oil reserves calculation and the development of CO2-related technologies. This study investigated the dissolution characteristics of CO2 in water-bearing crude oil under different temperature and pressure conditions, and proposed a new solubility prediction model. The results showed that temperature and pressure had significant effects on the solubility of CO2 in water-bearing crude oil, and the newly established prediction model exhibited high accuracy.
Article
Chemistry, Physical
E. J. Creatto, B. G. Alvarenga, P. G. de Moura, A. Perez-Gramatges
Summary: Foam stability is crucial for the success of foam-field applications. This study demonstrated that a mixture of cocamidopropyl hydroxysultaine and sodium dodecyl sulfate can significantly improve the stability of CO2-in-brine foams, reducing drainage and coarsening. The synergy exhibited by the surfactant mixtures not only enhanced the viscosity-driven stabilization of the foams, but also allowed for the retention of large amounts of CO2 inside the foam.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Mehdi Mahdaviara, Menad Nait Amar, Abdolhossein Hemmati-Sarapardeh, Zhenxue Dai, Changsong Zhang, Ting Xiao, Xiaoying Zhang
Summary: This paper utilizes artificial intelligence and neural networks for numerical investigation to predict the solubility of CO2 in live and dead oils, showing that the proposed models perform well and outperform previous methods.
Article
Chemistry, Physical
Masoud Seyyedattar, Ali Ghamartale, Sohrab Zendehboudi, Stephen Butt
Summary: CO2 injection into petroleum reservoirs is an effective method for enhanced oil recovery and reducing CO2 emissions. This study uses molecular dynamics simulations to model the swelling behavior of CO2-oil mixtures and accurately predict the swelling factors. The results demonstrate the successful application of the MD simulation technique in investigating CO2-oil behavior.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Lingyi Fan, Junbin Chen, Jianhong Zhu, Xiangrong Nie, Baoting Li, Zhaolong Shi
Summary: The study investigates the continuous change in oil and gas recovery during the transition from immiscible displacement to miscible displacement using a continuous multipressure point displacement experiment. The results show a step-like growth trend in the cumulative oil recovery factor, with variations in different scaled pores. These findings provide guidance for the implementation of CO2 flooding.
Article
Engineering, Chemical
Yuki Suzuki, Daisuke Kodama, Hirotoshi Mori, Nahoko Kuroki, Firoz Alam Chowdhury, Hidetaka Yamada
Summary: In this study, the CO2 Henry's law constants for several ionic liquids were predicted using the COSMO-RS method and machine learning. The solubilities of hydrocarbons in these selected ionic liquids were measured, and the CO2/hydrocarbon selectivities were calculated based on the experimental data. The results show that the selectivity depends on the anion of the ionic liquid.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Yunxing Cao, Junsheng Zhang, Xinsheng Zhang, Shimin Liu, Derek Elsworth
Summary: The study finds that high-pressure CO2 impact tests result in open and zigzag fractures on coal. This suggests that the fracturing mechanism of CO2 gas on coal can be described as four consecutive steps.
Article
Energy & Fuels
Xin Chen, Yi-Qiang Li, Zhe-Yu Liu, Japan Trivedi, Wen-Bin Gao, Ming-Yue Sui
Summary: Polymeric surfactants are efficient agents for enhanced oil recovery due to their high bulk viscosity and good interfacial activity. However, the matching relationship of polymeric surfactants with reservoirs and the conditions for emulsification are not well understood, which can affect their migration and EOR efficiency.
Article
Energy & Fuels
Yi Xue, P. G. Ranjith, Yang Chen, Chengzheng Cai, Feng Gao, Xingguang Liu
Summary: Geological sequestration of CO2 is important for reducing global warming and achieving carbon neutralization. This study evaluates the effect of CO2 adsorption pressure on the mechanical properties of coal mass using experimental and analytical methods. An elastic damage model is established to describe the nonlinear stress-strain relationship of coal under CO2 adsorption. The results show that increasing adsorption pressure increases the risk of coal damage and fracturing, leading to a more complex fracturing process.
Article
Energy & Fuels
Zongfa Li, Yuliang Su, Fuxiao Shen, Lijuan Huang, Shaoran Ren, Yongmao Hao, Wendong Wang, Yang Meng, Yang Fan
Summary: The feasibility of N2 alternating CO2 injection for improving CO2 storage and oil production was investigated through laboratory experiments and numerical simulation. The results showed that the N2 alternating CO2 flooding had 2.1% lower CO2 storage factor and 7.1% lower enhanced oil recovery compared to continuous CO2 injection. However, the larger the N2 slug volume, the lower the EOR and CO2 storage factor, due to the reduction of CO2 concentration in the gas phase and CO2 solubility in oil and water. Nevertheless, the N2 slugs significantly reduced mobility differences between flowing zones, resulting in a 1.78 times larger gas swept area and a 44% higher cumulative oil production compared to continuous CO2 injection. Moreover, the optimized N2 alternating CO2 injection scheme achieved 19.6% more CO2 storage than continuous CO2 flooding at a field scale. This study provides valuable experimental and theoretical support for improving CO2 storage and oil production in an oil reservoir.
Article
Energy & Fuels
Tiancheng Ji, Peixue Jiang, Ruina Xu
Summary: Hydraulic fracturing is widely used in shale gas development, but it can cause decline in production in water-sensitive formations. CO2 techniques, including CO2 fracturing, injection, and sequestration, can solve this problem, increase shale gas production, and store CO2 underground. The trade-off between the rising cost of deploying CO2 techniques and the benefit of increased shale gas production influences the technology portfolios for shale gas development. Financial incentives for carbon credits can provide compensation for the cost of CO2 techniques and further influence the technology portfolios. An optimization model is proposed to investigate the optimal technology mix for cost-effective shale gas development, considering different reservoir conditions and carbon price incentives. The results show that hydraulic fracturing is preferred in non-water sensitive scenarios, while CO2 fracturing and CO2 injection are preferred in water-sensitive scenarios. The synergistic deployment of CO2 fracturing and CO2 injection techniques can improve economic performance and carbon sequestration. This study provides critical insights for achieving cost-effective shale gas development while curbing carbon emissions.
Article
Chemistry, Multidisciplinary
Qasim Sahu, Marwan Fahs, Hussein Hoteit
Summary: Reservoir stimulation techniques, particularly in carbonate formations, are commonly used in the oil and gas industry to enhance productivity. This study develops an optimization workflow under uncertainty for matrix acidizing using a reactive transport model and surrogate modeling. The research investigates the impact of various parameters on the stimulation efficiency and provides physical insights into the matrix acidizing process.
Article
Chemistry, Physical
Rohit Kumar Saw, Anshuman Singh, Neetish Kumar Maurya, Ajay Mandal
Summary: Low salinity water flooding is cost-effective and environmentally friendly, and the addition of nanoparticles and polymers can significantly increase oil recovery. The viscosity of complex chemical slugs can be increased by adding nanoparticles to polymer solutions. Low salinity water requires a lower concentration of polymer to reach the target viscosity compared to high saline formation water. The addition of nanoparticles reduces interfacial tension and contact angle, leading to higher oil recovery in low salinity water. Injection of low salinity water-based complex fluid results in incremental recovery of OOIP compared to low salinity water and conventional formation water flooding.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Abdulwahab Alqahtani, Xupeng He, Bicheng Yan, Hussein Hoteit
Summary: This study presents a machine learning-assisted workflow for uncertainty and global sensitivity analysis of CO2 storage prediction. It includes steps for dataset generation, ML model development, and Monte Carlo simulations. The workflow is accurate and efficient for CO2 sequestration prediction.
Article
Energy & Fuels
Fatemah Alhamad, Rossen Sedev, Mujahid Ali, Muhammad Ali, Hussein Hoteit, Stefan Iglauer, Alireza Keshavarz
Summary: Hydrogen is expected to be a significant clean energy carrier, but the development of a hydrogen economy requires large-scale hydrogen storage. Different underground formations can be used for hydrogen storage, and wettability is an important factor in determining the containment security and storage capacity. This study investigates the use of a toxic dye, methyl orange, to alter the wettability of reservoirs for hydrogen geo-storage.
Article
Energy & Fuels
Nurudeen Yekeen, Ali Masoud Ali Elakkari, Javed Akbar Khan, Muhammad Ali, Ahmed Al-Yaseri, Hussein Hoteit
Summary: This study investigated the influence of multiwalled carbon nanotubes (MWCNTs), silicon dioxide (SiO2), and aluminum oxide (Al2O3) nanoparticles on the enhanced oil recovery (EOR) properties of a conventional surfactant (sodium dodecyl benzene sulfonate, SDBS). The results showed that adding nanoparticles to SDBS solutions reduced the fingering and channeling effect, and increased the oil recovery factor. The study highlights the importance of the nanoparticle-surfactant EOR mechanisms.
Article
Chemistry, Physical
Nilanjan Pal, Yara Alzahid, Abdulkareem M. AlSofi, Muhammad Ali, Xuan Zhang, Hussein Hoteit
Summary: This article discusses the use of microemulsion-assisted conformance improvement technology (ME-CIT) to decrease the water-to-oil ratio during production operations. Experimental validation is carried out to identify the phase behavior of surfactant-based microemulsions. The results show the presence of different Winsor phases at varying salinity levels and demonstrate the favorable flow attributes of microemulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Jamal Alaamri, Viswasanthi Chandra, Mouadh Addassi, Hussein Hoteit
Summary: Spontaneous imbibition is a crucial mechanism in multiphase fluid flow in porous media, with applications in oil extraction and CO2 storage. Traditional Amott cell experiments do not accurately mimic reservoir conditions, limiting their effectiveness. This study introduces the use of micro-CT and dynamic pore-scale imaging to visualize and quantify rock-to-rock imbibition within heterogeneous porous media, providing a new approach to evaluate imbibition mechanisms across different formations.
Article
Energy & Fuels
Amer Alanazi, Hussein Rasool Abid, Muhammad Usman, Muhammad Ali, Alireza Keshavarz, Volker Vahrenkamp, Stefan Iglauer, Hussein Hoteit
Summary: This study thoroughly investigated the storage efficiency of hydrogen (H2) and the selectivity of cushion gases (CO2 and CH4) in organic-rich carbonate-rich Jordanian source rock samples. Results showed that organic residuals significantly influenced H2 storage efficiency and CO2 demonstrated preferential behavior as a cushion gas compared to CH4. This study provides fundamental data for understanding H2 potential storage issues in an organic-rich rock formation and aids in the industrial implementation of an H2 supply chain.
Article
Energy & Fuels
Rohit Kumar Saw, Ajay Mandal
Summary: The low salinity water flooding (LSWF) technique is cost-effective and environmentally friendly, but its mechanisms are not yet clear. Recovery in LSWF depends on fluid/fluid and rock/fluid interactions. This study investigated both interactions and found different optimal conditions for improved oil recovery. Rock/fluid interaction showed an incremental recovery of 14%, while fluid/fluid interaction showed an incremental recovery of 7% over simple seawater injection. Results highlight the importance of considering both interactions and wettability alteration in LSWF design.
Article
Energy & Fuels
Hesham Abdulelah, Alireza Keshavarz, Hussein Hoteit, Hussein Abid, Eirini Goudeli, Jonathan Ennis -King, Stefan Iglauer
Summary: This study investigated the physisorption behavior of hydrogen on various earth minerals. The results showed that illite had the highest adsorption capacity, and high-surface-area materials like clays or kerogen exhibited better adsorption performance. These findings are important for evaluating the feasibility of underground hydrogen storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Fatemah Alhammad, Mujahid Ali, Nurudeen Peter Yekeen, Muhammad Ali, Hussein Hoteit, Stefan Iglauer, Alireza Keshavarz
Summary: Hydrogen (H2) shows great potential as an environmentally friendly alternative to fossil fuels, but storing large quantities of it poses challenges due to its compressibility and volatility. Underground hydrogen storage (UHS) is the best option for large-scale storage, and rock wettability plays a crucial role in determining the storage capacity and security. This study explores the use of methylene blue (MB) as a wettability modifier to enhance H2 storage in quartz contaminated with stearic acid.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Geosciences, Multidisciplinary
Amer Alanazi, Ahmed Al-Yaseri, Mahmoud Mowafi, Mahmoud Leila, Hussein Hoteit
Summary: This study evaluates the wettability of Saudi basalt as a caprock for underground hydrogen storage. The results show that Saudi basalt is water-wet and does not achieve full wetting of hydrogen even at high pressures. However, it has the potential to store a large volume of H-2 and maintain its excellent storage capacity in deep, high-pressure regimes.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Multidisciplinary Sciences
Nilanjan Pal, Yara Alzahid, Abdulkareem M. Alsofi, Muhammad Ali, Nurudeen Yekeen, Hussein Hoteit
Summary: This paper presents a systematic approach for designing and formulating surfactant-stabilized microemulsions for enhanced oil recovery. The methodology involves extensive laboratory work and functional assessments, considering factors such as cost, environment, and reservoir considerations.
Article
Energy & Fuels
Moumita Maiti, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: Hydrate inhibitors are crucial for preventing hydrate growth and ensuring smooth drilling operations. Water-soluble polymers, such as polyvinyl pyrrolidone (PVP K-90), have been found effective in reducing hydrate formation rates. This study investigates the influence of PVP K-90 concentration on hydrate inhibition in predesigned drilling fluids containing methane, ethane, and propane.
GAS SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Rohit Kumar Saw, Pranali M. Rane, Dinesh Joshi, Shubham Prakash, Lavisha Jangid, Ajay Mandal
Summary: In recent years, there has been increasing interest in the application of natural surfactants in enhanced oil recovery (EOR) due to environmental concerns. This study introduces a novel non-ionic surfactant synthesized from olive oil and evaluates its properties. The synthesized surfactant showed effective emulsification, wettability modification, and efficient oil displacement. Additionally, the surfactant had a low critical micelle concentration, indicating its ability to reduce interfacial tension.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.