The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
Chang He - One of the best experts on this subject based on the ideXlab platform.
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toward more cost effective and greener chemicals production from shale Gas by integrating with bioethanol dehydration novel process design and simulation based optimization
Aiche Journal, 2015Co-Authors: Chang HeAbstract:A novel process design for a more cost-effective, greener process for making chemicals from shale Gas and bioethanol is presented. The oxidative coupling of methane and cocracking technologies are considered for converting methane and light Natural Gas Liquids, into value-added chemicals. Overall, the process includes four process areas: Gas treatment, Gas to chemicals, methane-to-ethylene, and bioethanol-to-ethylene. A simulation-optimization method based on the NSGA-II algorithm for the life cycle optimization of the process modeled in the Aspen HYSYS is developed. An energy integration model is also fluidly nested using the mixed-integer linear programming. The results show that for a “good choice” optimal design, the minimum ethylene selling price is $655.1/ton and the unit global-warming potential of ethylene is 0.030 kg CO2-eq/kg in the low carbon shale Gas scenario, and $877.2/ton and 0.360 kg CO2-eq/kg in the high carbon shale Gas scenario. © 2014 American Institute of Chemical Engineers AIChE J, 61: 1209–1232, 2015
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shale Gas processing integrated with ethylene production novel process designs exergy analysis and techno economic analysis
Industrial & Engineering Chemistry Research, 2014Co-Authors: Chang HeAbstract:An important impact of shale Gas on the chemical industry is the production of value-added chemicals from Natural Gas Liquids (NGLs, C2H6, C3H8, C4H10, C5+). In this paper, three novel process designs are proposed for integrating shale Gas processing with ethylene production. The unique feature of the proposed process designs is the coprocessing of shale Gas and ethane cracking Gas. On the basis of detailed process modeling and simulation, we develop detailed thermo-economic models and exergy analysis for the process designs. The results show that the proposed process designs using NGLs-rich shale Gas have an adverse impact on both the overall exergy efficiency and total capital cost when compared with that of conventional shale Gas processing design. However, technology integration and better quality of raw shale Gas can significantly increase the profitability of the proposed process designs. The estimated net present values (NPVs) of proposed designs are 1.7–2.4 times greater than that of the conventio...
Ahram Ghorbani - One of the best experts on this subject based on the ideXlab platform.
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a novel energy efficient lng ngl recovery process using absorption and mixed refrigerant refrigeration cycles economic and exergy analyses
Applied Thermal Engineering, 2018Co-Authors: Ahram Ghorbani, Reza Shirmohammadi, Mehdi MehrpooyaAbstract:Abstract A novel integrated process comprising Natural Gas Liquids recovery along with Natural Gas liquefaction is investigated. Processes integration and design at the same time can reduce the number of required equipment and energy consumption in the units. Utilizing absorption refrigeration system in lieu of precooling stage of mixed fluid cascade refrigeration system in an energy efficient LNG-NGL recovery process with the main aim of reduction in required energy is investigated. High amount of energy consumption in these units is reduced due to the removal of a stage of the compression system, while the possibility of using waste thermal energy can be provided using absorption refrigeration system. The results of exergy analysis illustrate that the highest amount of exergy destruction is occurred in the air coolers before and after installation of the absorption refrigeration cycle at a rate of 56.21% and 42.72%, respectively. Sensitivity analysis has been carried out for economic parameters with respect to the utilities price as well as effect of products price on the market with respect to the presented structures.
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cascade refrigeration systems in integrated cryogenic Natural Gas process Natural Gas Liquids ngl liquefied Natural Gas lng and nitrogen rejection unit nru
Energy, 2016Co-Authors: Ahram Ghorbani, M.h. Hamedi, Majid Amidpou, Mehdi MehrpooyaAbstract:Heavy components in the Natural Gas itself can feed downstream units and also due to the low temperature process may be formed solid. Therefore heavy components separation is a necessity and can produce useful products. Virtually all Natural Gases are containing nitrogen that would lower the heating value of Natural Gas. This study investigates design and optimization of integrated process recovery of Natural Gas Liquids, Natural Gas liquefaction, and nitrogen remove unit. In this integrated process, design of low temperature processes is started from the core process and continued by heat exchangers network design and cooling system based on MFC. Design and integration processes of units at the same time reduces the number of required equipment and energy consumption. The results show that the new integrated process has specific power around 0.343–0.33 (kW-h/kg-LNG) and its thermal efficiency equal to 62.82%, compared to other integrated systems have the lowest and highest values. Exergy analysis shows that towers has the highest Exergy destruction among other equipment. Sensitivity analysis shows that the structure of the integrated process capable of removing nitrogen from Natural Gas at a concentration of between 5% and 15%. By analyzing the operating parameters shows reduction in the Total specific power from 19.5% to 24% and the Specific power from 2.57% to 11%, yet surging in the Ethane recovery from 2.5% to 17%. Sensitivity analysis is the method to identification of the Decision variables, finally Genetic Algorithm used to identify optimum of objective function (minimization of Specific Power) and reduction of it to 6%.
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development and optimization of an integrated process configuration for Natural Gas liquefaction lng and Natural Gas Liquids ngl recovery with a nitrogen rejection unit nru
Journal of Natural Gas Science and Engineering, 2016Co-Authors: Ahram Ghorbani, M.h. Hamedi, Majid AmidpouAbstract:Abstract In this study a novel integrated process including recovery of Natural Gas Liquids, Natural Gas liquefaction and nitrogen rejection unit is investigated and analyzed. Natural Gas is often associated with nitrogen and hydrocarbon heavy compounds. Recovering such heavy Liquids can be necessary. Nitrogen of the Natural Gas when its content is more than 4 percent (mole fraction) must be removed. Because operating temperature of the LNG, NGL and NRU processes are lower than −100 °C there a good potential to integrate these processes. Process integration declines the energy consumption and number of the required equipment. The results show that the new integrated process has specific power of 0.359 (kWh/kg-LNG) and recover NGL more than 90%. Sensitivity analysis shows that this process is capable of eliminating nitrogen from the Natural Gas at a concentration of 4%–15%.
S Farooq - One of the best experts on this subject based on the ideXlab platform.
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technoeconomic perspective on Natural Gas Liquids and methanol as potential feedstocks for producing olefins
Industrial & Engineering Chemistry Research, 2019Co-Authors: Arnab Dutta, I A Karimi, S FarooqAbstract:With increasing worldwide explorations of Gas resources, in particular, shale Gas, there will soon be an abundance of Natural Gas Liquids (NGL) for exporting as potential feedstock for chemical production to countries deprived of Natural Gas (NG) reserves. Methanol, derived from NG or via CO2 utilization as a measure to curb CO2 emissions, is also a potential feedstock in chemical industries. We anticipate that a shift toward unconventional feedstocks in the future will make NGL and methanol the likely competitors as raw materials in the chemical sector. In this context, we present a technoeconomic perspective on two processes, NTO (NGL to olefins) and MTO (methanol to olefins), for producing olefins. Our analyses suggest that NTO is more profitable than MTO. It not only results in a 55% higher net present value but also yields a lower break even ethylene price compared to MTO. Accounting for the fluctuations in market prices, NTO is 14% more likely to be profitable than MTO. Thus, from an economic perspe...
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Technoeconomic Perspective on Natural Gas Liquids and Methanol as Potential Feedstocks for Producing Olefins
2018Co-Authors: Arnab Dutta, I A Karimi, S FarooqAbstract:With increasing worldwide explorations of Gas resources, in particular, shale Gas, there will soon be an abundance of Natural Gas Liquids (NGL) for exporting as potential feedstock for chemical production to countries deprived of Natural Gas (NG) reserves. Methanol, derived from NG or via CO2 utilization as a measure to curb CO2 emissions, is also a potential feedstock in chemical industries. We anticipate that a shift toward unconventional feedstocks in the future will make NGL and methanol the likely competitors as raw materials in the chemical sector. In this context, we present a technoeconomic perspective on two processes, NTO (NGL to olefins) and MTO (methanol to olefins), for producing olefins. Our analyses suggest that NTO is more profitable than MTO. It not only results in a 55% higher net present value but also yields a lower break even ethylene price compared to MTO. Accounting for the fluctuations in market prices, NTO is 14% more likely to be profitable than MTO. Thus, from an economic perspective, NGL appears to be a more attractive feedstock for producing olefins than methanol
Majid Amidpou - One of the best experts on this subject based on the ideXlab platform.
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cascade refrigeration systems in integrated cryogenic Natural Gas process Natural Gas Liquids ngl liquefied Natural Gas lng and nitrogen rejection unit nru
Energy, 2016Co-Authors: Ahram Ghorbani, M.h. Hamedi, Majid Amidpou, Mehdi MehrpooyaAbstract:Heavy components in the Natural Gas itself can feed downstream units and also due to the low temperature process may be formed solid. Therefore heavy components separation is a necessity and can produce useful products. Virtually all Natural Gases are containing nitrogen that would lower the heating value of Natural Gas. This study investigates design and optimization of integrated process recovery of Natural Gas Liquids, Natural Gas liquefaction, and nitrogen remove unit. In this integrated process, design of low temperature processes is started from the core process and continued by heat exchangers network design and cooling system based on MFC. Design and integration processes of units at the same time reduces the number of required equipment and energy consumption. The results show that the new integrated process has specific power around 0.343–0.33 (kW-h/kg-LNG) and its thermal efficiency equal to 62.82%, compared to other integrated systems have the lowest and highest values. Exergy analysis shows that towers has the highest Exergy destruction among other equipment. Sensitivity analysis shows that the structure of the integrated process capable of removing nitrogen from Natural Gas at a concentration of between 5% and 15%. By analyzing the operating parameters shows reduction in the Total specific power from 19.5% to 24% and the Specific power from 2.57% to 11%, yet surging in the Ethane recovery from 2.5% to 17%. Sensitivity analysis is the method to identification of the Decision variables, finally Genetic Algorithm used to identify optimum of objective function (minimization of Specific Power) and reduction of it to 6%.
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development and optimization of an integrated process configuration for Natural Gas liquefaction lng and Natural Gas Liquids ngl recovery with a nitrogen rejection unit nru
Journal of Natural Gas Science and Engineering, 2016Co-Authors: Ahram Ghorbani, M.h. Hamedi, Majid AmidpouAbstract:Abstract In this study a novel integrated process including recovery of Natural Gas Liquids, Natural Gas liquefaction and nitrogen rejection unit is investigated and analyzed. Natural Gas is often associated with nitrogen and hydrocarbon heavy compounds. Recovering such heavy Liquids can be necessary. Nitrogen of the Natural Gas when its content is more than 4 percent (mole fraction) must be removed. Because operating temperature of the LNG, NGL and NRU processes are lower than −100 °C there a good potential to integrate these processes. Process integration declines the energy consumption and number of the required equipment. The results show that the new integrated process has specific power of 0.359 (kWh/kg-LNG) and recover NGL more than 90%. Sensitivity analysis shows that this process is capable of eliminating nitrogen from the Natural Gas at a concentration of 4%–15%.
Jin Kuk Kim - One of the best experts on this subject based on the ideXlab platform.
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dynamic simulation and control of Natural Gas Liquids recovery process
Journal of Cleaner Production, 2020Co-Authors: Sekwang Yoo, Jin Kuk KimAbstract:Abstract As Natural Gas Liquid (NGL) recovery process produces methane-rich Gas from C2+ Liquids at high pressure and sub-ambient temperature, it is important to implement robust process control schemes for ensuring operating integrity and process safety. The study aims to assess a range of control schemes and their dynamic characteristics for the NGL recovery process, and to determine the most appropriate and effective process control scheme. Equipment sizing have been made through steady state modeling and equipment-specific process design, with which dynamic model for the NGL process has been constructed. Dynamic responses and safety issues are investigated for each control scheme by changing feed flowrate and composition. Emergency scenarios occurred by malfunction or local control error have been addressed with dynamic model and the control scheme selected, for improving process operability and safety in practice. The systematic implementation of control structure with appropriate actions allows to enhance sustainability of NGL recovery processes by reducing unwanted waste generation and minimizing unnecessary energy usage.
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Development of energy-efficient processes for Natural Gas Liquids recovery
Energy, 2017Co-Authors: Sekwang Yoon, Michael Binns, Sangmin Park, Jin Kuk KimAbstract:A new NGL (Natural Gas Liquids) recovery process configuration is proposed which can offer improved energy efficiency and hydrocarbon recovery. The new process configuration is an evolution of the conventional turboexpander processes with the introduction of a split stream transferring part of the feed to the demethanizer column. In this way additional heat recovery is possible which improves the energy efficiency of the process. To evaluate the new process configuration a number of different NGL recovery process configurations are optimized and compared using a process simulator linked interactively with external optimization methods. Process integration methodology is applied as part of the optimization to improve energy recovery during the optimization. Analysis of the new process configuration compared with conventional turbo-expander process designs demonstrates the benefits of the new process configuration.
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application of exergy analysis for improving energy efficiency of Natural Gas Liquids recovery processes
Applied Thermal Engineering, 2015Co-Authors: Jihoo Shi, Sekwang Yoo, Jin Kuk KimAbstract:Abstract Thermodynamic analysis and optimization method is applied to provide design guidelines for improving energy efficiency and cost-effectiveness of Natural Gas Liquids recovery processes. Exergy analysis is adopted in this study as a thermodynamic tool to evaluate the loss of exergy associated with irreversibility in Natural Gas Liquids recovery processes, with which conceptual understanding on inefficient design feature or equipment can be obtained. Natural Gas Liquids processes are modeled and simulated within UniSim ® simulator, with which detailed thermodynamic information are obtained for calculating exergy loss. The optimization framework is developed by minimizing overall exergy loss, as an objective function, subject to product specifications and engineering constraints. The optimization is carried out within MATLAB ® with the aid of a stochastic solver based on genetic algorithms. The process simulator is linked and interacted with the optimization solver, in which optimal operating conditions can be determined. A case study is presented to illustrate the benefit of using exergy analysis for the design and optimization of Natural Gas Liquids processes and to demonstrate the applicability of design method proposed in this paper.
