A novel propane pre-cooled mixed refrigerant process for coproduction of LNG and high purity ethane

He, Ting; Lin, Wensheng

doi:10.1016/j.energy.2020.117784

Cited by 30 publications

(6 citation statements)

References 27 publications

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“…In the pre‐cooling cycle, a multistage refrigeration cycle with three to four different pressure levels is used to exchange heat with the gas streams and warm mixed refrigerant so that both streams reach a temperature of about –35 °C. In the liquefaction subcooling cycle using the mixed refrigerant, the natural gas is further cooled from –35 °C to approximately –160 °C 31. Mixed fluid cascade (MFC): In this method, three mixed working fluids are utilized in three cascade cycles to pre‐cool, liquefy, and sub‐cool the natural gas. A multi‐stream heat exchanger is utilized for the three major cycles 32.…”

Section: Natural Gas Liquefactionmentioning

confidence: 99%

Section: Natural Gas Liquefactionmentioning

confidence: 99%

“…Since every component having a different condensation temperature from methane would be liquefied in the liquefaction process, it becomes possible to incorporate the NGL recovery within the LNG liquefaction process. Many researchers have investigated combined systems of natural gas liquefaction with NGL recovery [31]. These investigations are presented in Tab.…”

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confidence: 99%

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Liquefied Natural Gas Value Chain: A Comprehensive Review and Analysis

Shingan,

Banerjee,

Kumawat

et al. 2023

Chem Eng & Technol

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Over the past few decades, the liquefied natural gas (LNG) business has experienced astounding expansion and gained global relevance. LNG has emerged as a key element in meeting the world's rising energy demand while working to cut carbon emissions, since it is a cleaner and more adaptable energy source. The entire process from natural gas extraction to consumption is covered in the presented analysis of the LNG value chain, starting out by looking at the discovery and production of natural gas reserves, highlighting important innovations and methods used during the extraction stage. The procedures used to treat and purify natural gas in order to meet the strict standards for liquefaction are detailed. Analysis of the liquefaction process reveals numerous liquefaction technologies, e.g. the well‐known conventional liquefaction and the cutting‐edge floating LNG and small‐scale LNG facilities. LNG storage and transportation, as critical components in the value chain, are examined in great detail. When the LNG reaches its destination, regasification plays a crucial role in repurposing it as a gas for distribution and consumption. Regasification technologies, such as conventional onshore terminals, floating storage and regasification units, and land‐based regasification facilities, are covered. Concerns regarding methane emissions and the carbon footprint, the potential for reducing greenhouse gas emissions through new technology, the environmental impact of LNG, and the economics of LNG are also considered across its value chain.

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Section: Natural Gas Liquefactionmentioning

confidence: 99%

Section: Natural Gas Liquefactionmentioning

confidence: 99%

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Liquefied Natural Gas Value Chain: A Comprehensive Review and Analysis

Shingan,

Banerjee,

Kumawat

et al. 2023

Chem Eng & Technol

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“…Furthermore, it has the advantages of structure and energy integration, obtaining the low‐pressure products of both LNG and LEG, which facilitates the storage and transportation. For different processing scale and application requirements, the nitrogen expansion process, 39 C3MR process, 44 SMR process, 45 and DMR process 46 are used to provide cooling capacity for the system. Natural gas liquefaction is energy intensive, and the power consumption of the system mainly comes from the refrigerant compressors.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of cascade liquefaction processes for coproducing liquid ethane and LNG

Lin

2022

Intl J of Energy Research

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Ethane recovery is an important way to increase the economic benefits of unconventional natural gas, such as shale gas. However, current researches did not focus on obtaining high purity and high recovery rate of ethane. In this study, two pure refrigerant cascade natural gas liquefaction processes without (Process 1) or with (Process 2) flash gas recovery are proposed to coproduce high-purity liquefied ethane gas (LEG) and liquefied natural gas (LNG). The proposed processes are combined with advanced distillation methods to reduce the energy consumption through process and energy integration. Aspen HYSYS V11 and genetic algorithm (GA) are used to simulate proposed processes and optimize the refrigeration cycles, respectively. To search the optimal conditions of distillation column, power consumption under different distillation pressure is comparatively analyzed, and the optimal distillation pressure is about 2.7 MPa. According to the optimization results, the specific power consumption of Process 1 is 0.4384 ~0.4584 kWh/Nm 3 (NG), and that of Process 2 is 0.4336 ~0.4503 kWh/Nm 3 (NG) when ethane content is 10% ~40%. Process 2 is preferred for lower power consumption and no material waste.Further study is conducted to research the effect of throttling temperature and ethane content on the system performance of Process 2. In addition, the feasibility exploration of cryogenic compression shows that re-compression of natural gas after distillation is not energy saving for the proposed process.

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“…In recent years, environmental protection and the reduction of carbon dioxide emissions have become a hot spot worldwide [1,2]. Compared with other fossil fuels, natural gas (NG) is considered a sustainable and potential source of energy in the future [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

MINLP Model for Operational Optimization of LNG Terminals

Xiaoyan

Zhao

2021

Processes

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Liquefied natural gas (LNG) is a clear and promising fossil fuel which emits less greenhouse gas (GHG) and has almost no environmentally damaging sulfur dioxide compared with other fossil fuels. An LNG import terminal is a facility that regasifies LNG into natural gas, which is supplied to industrial and residential users. Modeling and optimization of the LNG terminals may reduce energy consumption and GHG emission. A mixed-integer nonlinear programming model of the LNG terminal is developed to minimize the energy consumption, where the numbers of boil-off gas (BOG) compressors and low-pressure (LP) pumps are considered as integer variables. A case study from an actual LNG terminal is carried out to verify the practicality of the proposed method. Results show that the proposed approach can decrease the operating energy consumption from 9.15% to 26.1% for different seasons.

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A novel propane pre-cooled mixed refrigerant process for coproduction of LNG and high purity ethane

Cited by 30 publications

References 27 publications

Liquefied Natural Gas Value Chain: A Comprehensive Review and Analysis

Liquefied Natural Gas Value Chain: A Comprehensive Review and Analysis

Design and analysis of cascade liquefaction processes for coproducing liquid ethane and LNG

MINLP Model for Operational Optimization of LNG Terminals

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