Article
Energy & Fuels
Hajer Mkacher, Fares AlMomani, Ajinkya Pal, Iftekhar A. Karimi, Easa Al-musleh
Summary: This study presents a rigorous simulation method for the cold section of an LNG plant and proposes a process optimization technique using upfront nitrogen removal. The results show that this technique can significantly increase plant capacity without the need for structural modifications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Engineering, Chemical
Muhammad Haziq Noor Akashah, Nor Erniza Mohammad Rozali, Shuhaimi Mahadzir, Peng Yen Liew
Summary: Liquified natural gas (LNG) is a clean and popular primary energy source due to its long transportation distance. The cold energy stored in LNG can be utilized to enhance energy efficiency and economic viability of LNG supply chains. This review discusses current techniques and potential future applications of LNG cold energy utilization.
Article
Engineering, Environmental
Yamei Yang, Rui Du, Changrui Shi, Jiafei Zhao, Yongchen Song, Lunxiang Zhang, Zheng Ling
Summary: A new desalination technology using graphite-promoted cyclopentane hydrate was proposed for removing K3PO4 from effluents. The study found that factors such as temperature, time, and concentration of feeding K3PO4 solution significantly influenced the desalination efficiency and salt enrichment performance. The study also highlighted the pre-melting effect at high K3PO4 concentrations as critical for improving desalination efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
Chen Chen, Haoyu Yuan, Rongshan Bi, Na Wang, Yujiao Li, Yan He, Fei Wang
Summary: This study aims to propose a novel natural gas peak-shaving process using gas hydrates as the medium to address the supply-demand imbalance in natural gas. Through process simulation and economic analysis, the study shows that the proposed peak-shaving process can improve economic efficiency compared to traditional operational models.
Article
Thermodynamics
Ting Guo, Lesheng Liu, Jiubing Shen, Qingfeng Jiang, Sichen Wu, Yanyan Zhou, Yi Liu
Summary: This study proposes a control strategy to optimize the liquefaction process by adding a BOG buffer tank to the Reverse Brayton Process. Simulations and analyses were conducted using Aspen HYSYS software to evaluate the efficiency, energy consumption, and liquefaction rate under different operating conditions. The results show that the specific energy consumption is reduced and the system maintains stability and flexibility when the feed gas volume fluctuates.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Green & Sustainable Science & Technology
Elias M. Salilih, Muhammad Naveed Khan, Omar Bamaga, Iqbal Ahmed, Mohammad Albeirutty, Eydhah Almatrafi, Hani Abulkhair, Hisham Alhumade, Ahmed Bamasag, Mohammed G. H. Haidar
Summary: Water scarcity is a major global risk due to population growth, excessive industrial activities, and limited freshwater resources. Sustainable and economical seawater desalination techniques are needed, and this study proposes a hydrate-based desalination system using liquefied natural gas (LNG) as a cooling energy source. The study focuses on analyzing the complex heat transfer processes of an intermediate fluid type LNG vaporizer (IFV) and develops an algorithm to evaluate its thermal performance. The study also investigates the operating parameters of the LNG vaporizer and conducts a thermal analysis of the hydrate-based desalination system.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Khadije El Kadi, Isam Janajreh, Sufian Abedrabbo, Mohamed Ibrahim Ali
Summary: Hypersaline brine production from desalination plants causes significant environmental stress, and the increasing desalination capacity is expected to further exacerbate the issue. Zero liquid discharge (ZLD) or minimal liquid discharge (MLD) systems offer a potential solution for sustainable brine management by maximizing water recovery and minimizing liquid waste. This study proposes a theoretical design for a ZLD/MLD system using reverse osmosis (RO) brine management, incorporating multistage freeze desalination (FD) and its hybridization with direct contact membrane distillation (DCMD) and eutectic freeze crystallization (EFC) technologies. The design is based on experimental assessment and computational fluid dynamics (CFD) modeling. Results show that the proposed design can achieve water recovery between 40 and 93% with specific energy consumption (SEC) ranging from 28 to 114 kWh/m(3), while exceeding drinkable water standards.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ajinkya Pal, Easa Al-musleh, Iftekhar A. Karimi
Summary: LNG has been recognized globally as a cleaner and more efficient energy source compared to other fossil fuels, with the cold section being the most energy-intensive part of a typical LNG plant. This study focuses on developing an energy self-sustaining model for the cold section of a conventional LNG plant, utilizing waste streams to power gas turbines and proposing structural changes to reduce energy requirements and increase LNG production. The findings show that these structural improvements not only lower total power usage by 4.83% and increase LNG output by 0.48%, but also further reduce specific power consumption by 5.52%.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Energy & Fuels
Tianbiao He, Jibao Zhang, Ning Mao, Praveen Linga
Summary: Clathrate hydrate-based desalination is a promising but energy-intensive technology. By utilizing LNG cold exergy, a sustainable process integrated with an organic Rankine cycle was proposed to simultaneously generate fresh water and electricity. Economic analysis showed that this proposed process could achieve zero specific energy consumption for desalination and generate extra power.
Article
Thermodynamics
Liang Yin, Meng Qi, Yonglin Ju, Il Moon
Summary: This paper proposes a novel concept of BOG treatment combined with air liquefaction, and designs and analyzes a new process for recovering cold energy of BOG and fueled LNG. The results show that the system performs well in terms of energy and heat exchange efficiency.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Engineering, Chemical
Yuhui Yang, Hairui Wang, Weixiong Huang, Yang Gao, Zhaoyang Li, Xingpeng Wang
Summary: Cryo-desalination is an effective method for separating freshwater from saline solution. Experimental results showed that ion migration in the freezing process was influenced by factors such as initial ion concentration, ion radius, and freezing temperature. Monatomic ions with higher concentration and larger radius were more likely to be trapped by ice crystals during freezing.
Article
Energy & Fuels
Chulmin Hwang, Sungkyun Oh, Donghoi Kim, Truls Gundersen, Youngsub Lim
Summary: This paper comparatively analyzes the re-liquefaction system for a low-pressure gas injection engine according to the refrigerant, with a focus on energy, economic, and environmental aspects. The results show that the process without external refrigerant performs better in terms of economy, while the single mixed refrigerant process is more suitable in terms of energy efficiency and environmental impact.
Article
Engineering, Chemical
Muhammad Haris Hamayun, Naveed Ramzan, Murid Hussain, Muhammad Faheem
Summary: The article introduces the background and demand for imported liquefied natural gas (LNG) in Pakistan, and proposes a method of recovering cold energy by integrating the LNG regasification process with the cryogenic air separation process. Conventional exergy analysis shows that the integrated process is better in terms of energy consumption and exergy destruction ratio. Further analysis reveals that improving the efficiency of individual equipment is crucial for process improvement.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Jiye Park, Jinwoo Park, Junghwan Kim
Summary: This study proposes a novel LNG cold energy multi-utilization process by integrating LHS and HYD, achieving efficient and practical LNG cold energy recovery. The results show that the process improves energy utilization by reducing exergy loss by 16.47%. It also enables the recovery of high-value materials such as liquefied ethane and liquefied petroleum gas, high-purity methane gas, and pure water.
Article
Thermodynamics
Yiming Zhao, Dapeng Hu, Dongxu Cai, Yingguang Wang, Yong Liang
Summary: This study proposes a novel multi-stream cascade combined cycle (MS-CCC) system that enhances the utilization efficiency of cold energy and recovers the cold energy of the working fluid without additional heat exchangers. Compared to traditional methods, MS-CCC shows significant improvements in net annual income and efficiency.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Praveen Linga
Summary: This article presents a bibliometric analysis of the field of gas hydrates or clathrate hydrates from 1901 to 2020. The analysis includes the top countries, cited review articles, original research articles, source titles, field classifications, citation rate trends, and co-occurrence of keywords. Network visualization maps were created to analyze the citations and identify the relationships between countries, sources, and organizations.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Zuming Liu, Arijit Chakraborty, Tianbiao He, Iftekhar A. Karimi
Summary: The chemical industry relies heavily on fossil fuels, resulting in significant carbon emissions. Implementing combined heat and power (CHP) systems can effectively reduce both energy consumption and carbon emissions. This study presents a bi-objective optimization framework for CHP systems in chemical plants, considering steam turbine network design and renewable integration. The results demonstrate the trade-off between total annual cost and carbon emissions, showing the potential for emissions reduction through CHP systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Environmental
Kan Jeenmuang, Phuwadej Pornaroontham, Katipot Inkong, Gaurav Bhattacharjee, Santi Kulprathipanja, Praveen Linga, Pramoch Rangsunvigit
Summary: This study reveals that using amino acids as kinetic promoters can enhance the formation of mixed methane-THF hydrates at room temperature and pressure, with hydrophobic amino acids showing the most significant effect.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Hyunho Kim, Junjie Zheng, Zhenyuan Yin, Ponnivalavan Babu, Sreekala Kumar, Jackson Tee, Praveen Linga
Summary: The rheology of TBAB semi-clathrate hydrate slurry (SHS) was studied, and the discrepancy in the literature was clarified. TBAB SHS exhibited non-Newtonian shear-thinning behavior, with its apparent viscosity increasing exponentially with the increase of hydrate fraction. Type B TBAB SHS was recommended due to its lower apparent viscosity. Additionally, the environmentally benign additive L-tryptophan was found to significantly decrease the apparent viscosity of TBAB SHS and reduce pumping power consumption in cooling applications by 68.7%.
Article
Chemistry, Multidisciplinary
Viphada Yodpetch, Katipot Inkong, Hari Prakash Veluswamy, Santi Kulprathipanja, Pramoch Rangsunvigit, Praveen Linga
Summary: Carbon capture and storage (CCS) is a promising method for reducing carbon dioxide (CO2) emissions from fossil fuels. Amino acids, such as leucine, methionine, and valine, were used as promoters in CO2 hydrate formation. Different concentrations of amino acids had varying effects on the rate of hydrate formation. The use of amino acids with the hybrid combinatorial reactor (HCR) approach shows promise for CCS applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Energy & Fuels
Vikas Dhamu, M. Fahed Qureshi, Saifudin Abubakar, Adam Usadi, Timothy A. Barckholtz, Ashish B. Mhadeshwar, Praveen Linga
Summary: Carbon capture and storage [CCS] is essential for reducing CO2 emissions, and one potential CCS concept is compressing and storing captured CO2 as gas hydrates in deep oceanic sediments. However, the high salinity of seawater may affect the formation and storage of CO2 hydrates. Therefore, it is crucial to understand the kinetics of liquid CO2 hydrate formation and dissociation in static brine systems.
Article
Energy & Fuels
Ye Zhang, Huanzhi Xu, Gaurav Bhattacharjee, Praveen Linga
Summary: With the increasing demand for natural gas in the current century, solidified natural gas technology is expected to play a vital role in enhancing energy resilience and ensuring sufficient energy supply globally. In this study, dioxane was used as an environmentally friendly additive and a dual-function promoter for hydrate formation in simulated seawater, addressing the issues of water scarcity and the use of toxic chemicals, and potentially increasing methane storage capacity.
Article
Engineering, Chemical
Namrata Gaikwad, Hyunho Kim, Gaurav Bhattacharjee, Jitendra S. Sangwai, Rajnish Kumar, Praveen Linga
Summary: This study experimentally investigated the formation of sH hydrate with methane and cyclooctane for possible applications in gas storage. The study found that the slow kinetics of sH hydrate formation can be improved by using low tryptophan concentrations. Raman analysis confirmed the presence of methane and cyclooctane in the sH hydrate cages.
ACS ENGINEERING AU
(2023)
Article
Energy & Fuels
Zheng Liu, Junjie Zheng, Zhiyuan Wang, Yonghai Gao, Baojiang Sun, Youqiang Liao, Praveen Linga
Summary: Natural gas hydrate (NGH) is an unconventional energy source with high energy density, huge reserves, and worldwide distribution. Sand-dominated hydrate-bearing sediments (HBS) are the most feasible category for exploitation, however, the presence of clay hinders the formation kinetics of the hydrates, making it challenging to study fluid production behavior. This study synthesized clayey-sandy HBS samples using a new method and observed that the presence of clay led to slower hydrate decomposition and a significant difference in fluid production behavior compared to sandy HBS. The findings call for further investigations and development of specific production strategies for clay-containing HBS.
Article
Engineering, Environmental
Jibao Zhang, Yan Li, Zhenyuan Yin, Praveen Linga, Tianbiao He, Xiangyuan Zheng
Summary: This study introduces an environmentally friendly kinetic promoter (L-valine) and couples it with a thermodynamic promoter (THF) to enhance the kinetics of H2 hydrate formation. The optimal enhancement is achieved using 0.3 wt% L-Val coupled with 5.56 mol% THF, resulting in a maximum volumetric H2 uptake of 29.83 +/- 1.22 v/v. The results provide insights into accelerating H2 uptake in solid-hydrate form and have potential applications in hydrate-based hydrogen storage.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Wenliang Meng, Dongliang Wang, Huairong Zhou, Yong Yang, Hongwei Li, Zuwei Liao, Siyu Yang, Xiaodong Hong, Guixian Li
Summary: A high proportion of renewable energy integration is a characteristic of future electric power grid, and power-to-NH3 technologies will be crucial for inter-quarter long-term energy storage. In addition, CO2 capture in coal-based power plants is essential for peak regulation. This study developed a novel urea synthesis process based on renewable energy, which resulted in significantly lower CO2 emissions compared to traditional coal and natural gas-based processes. While the production cost of the new process is higher, it becomes more economical when considering carbon tax values.
Article
Engineering, Chemical
Dnyanesh Deshpande, Mohd Shahrukh, Rajagopalan Srinivasan, Iftekhar A. Karimi
Summary: This study investigates the annual delivery program (ADP) problem for natural gas suppliers, incorporating customer inventory and berth management, customer demand satisfaction, and the delivery of multiple LNG grades. A mathematical programming model is proposed to maximize the supplier's profit.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Yan Li, Zhenyuan Yin, Hongfeng Lu, Chenlu Xu, Xuejian Liu, Hailin Huang, Daoyi Chen, Praveen Linga
Summary: Carbon capture and sequestration (CCS) is widely recognized as the most effective technology for reducing CO2 emissions and mitigating global climate change. Hydrate-based CO2 sequestration (HBCS) has emerged as a promising technology, and there is growing interest in using hydrophobic amino acids to enhance CO2 hydrate formation kinetics.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
