A novel conceptual design of LNG-sourced natural gas peak-shaving with gas hydrates as the medium

Chen, Chen; Yuan, Haoyu; Bi, Rongshan; Wang, Na; Li, Yujiao; He, Yan; Wang, Fei

doi:10.1016/j.energy.2022.124169

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…That being said, gashydrates were investigated for another purpose, though relevant to the subject of LNG, and that is the storage and transport of NG by using gas-hydrates as mediums, which are reported to increase the economic efficiency when compared to liquid phase storage and transport. 72,73 Besides the physical processes discussed so far, nitrogen could also be removed chemically, and this always entails a chemical interaction occurring between some component of the NG with material brought in contact with it, either solid or liquid (solvent) phase. The most obvious and relevant example of this is the nitridation reaction, which is the first step of the Li-Cy proposed in this study.…”

Section: The Li-cy: Against the Current And The Alternativesmentioning

confidence: 99%

“…More research is required in this area to study the technology's performance on UNR in the hot section of an LNG plant containing mostly methane and lower hydrocarbons with low amounts of nitrogen before making any confident state in the feasibility of the process. That being said, gas‐hydrates were investigated for another purpose, though relevant to the subject of LNG, and that is the storage and transport of NG by using gas‐hydrates as mediums, which are reported to increase the economic efficiency when compared to liquid phase storage and transport 72,73 …”

Section: The Applicability Of the Li‐cymentioning

confidence: 99%

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A critical review on the practical use of lithium cycle as an upfront nitrogen removal technology from natural gas

Omar

Ibrahim

Almomani

2022

Energy Science & Engineering

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The increase in energy demand as the world population grows, as well as the competition in the liquefied natural gas (LNG) market, force producers to work hard on developing cost‐effective production technologies. Upfront nitrogen removal (UNR) before the LNG plant's cold section is considered a promising option to save energy that would otherwise be wasted to cool down a large volume of unused nitrogen in the gas stream. In this study, the use of the lithium cycle (Li‐Cy) as a cost‐effective method for UNR is investigated. The Li‐Cy is compromised of three stages: lithium chemisorption of nitrogen (Chem normalN 2 ${\mathrm{Chem}}_{{{\rm{N}}}_{2}}$), hydrolysis of lithium nitride (HydLi 3 normalN ${\mathrm{Hyd}}_{{\mathrm{Li}}_{3}{\rm{N}}}$), and electrowinning (Elec.‐w) of the final product to precipitate lithium metal for further reuse. The relevant chemistry, applicability, economic, and future challenges of Li‐Cy as a UNR technology from natural gas (NG) were explored and discussed. The main challenges that required further investigation to apply Li‐Cy to large‐scale applications were highlighted for future works. The literature review revealed that Li‐Cy can spontaneously remove nitrogen from NG even at low temperatures and produces ammonia as a valuable hydrogen storage material. The used lithium can be regenerated via HydLi 3 normalN ${\mathrm{Hyd}}_{{\mathrm{Li}}_{3}{\rm{N}}}$ and Elec.‐w and reused again many times. The cost of the Li‐Cy can be compensated by energy savings, the increase in production rate, and by selling the generated ammonia. Calculations showed that selling the produced ammonia from LNG plants with capacity in the range of 1–5 MTPA would not only offset the costs of Li‐Cy but would generate a net profit of $21MM to $103MM, respectively.

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Section: The Li-cy: Against the Current And The Alternativesmentioning

confidence: 99%

Section: The Applicability Of the Li‐cymentioning

confidence: 99%

A critical review on the practical use of lithium cycle as an upfront nitrogen removal technology from natural gas

Omar

Ibrahim

Almomani

2022

Energy Science & Engineering

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“…The main methods used in peak regulation by the gas field are super‐strength mining and amplifying pressure difference [99]. By these methods, the amount of natural gas produced can be adjusted to meet the requirements of peak regulation.…”

Section: Price Mechanism and Flexibility Of Fuel Supply For Gas‐fired...mentioning

confidence: 99%

Key problems of gas‐fired power plants participating in peak load regulation: A review

Wang

Fan

et al. 2022

IET Cyber-Phy Sys Theory & Ap

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The peak regulation capacity of gas‐fired power plants has always been an important flexibility resource of the power grid. Under the guidance of carbon emission reduction, the coal power units are gradually shut down, making the role of gas‐fired power plants more important. However, in practice, gas‐fired power plants often fail to show satisfactory flexibility. The main reasons are as follows: (1) Part of the capacity mechanism fails to effectively encourage gas‐fired power plants to provide reliable flexibility and (2) the unreliability of fuel supply for gas‐fired power plants. Aiming at these problems, the current capacity mechanism in different countries is first summarised and the applicability of the capacity mechanism for gas‐fired power plants under the government regulation and market‐oriented environment is analysed, respectively. Then, the characteristics of power dispatching and gas dispatching are analysed to explore the internal reasons for the unreliable fuel supply in gas‐fired power plants. Based on the above analysis, the gas‐electric coordination mechanism adapted to different development stages is proposed to solve the problem that the flexibility of gas‐fired power plants cannot be guaranteed. In summary, through the research of this study, it is found that the main reason for the limited flexibility of gas‐fired power plants is the lack of coordination among multiple entities belonging to different energy systems, such as electricity and gas. The cooperation mechanism proposed is an attempt to realise the cooperation between the electric system and the gas system, which provides the reference for closer collaboration among multiple energy systems in the future.

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Formation-water evaporation and salt precipitation mechanism in porous media under movable water conditions in underground gas storage

He,

Wang,

Tang

et al. 2024

Energy

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A novel conceptual design of LNG-sourced natural gas peak-shaving with gas hydrates as the medium

Cited by 7 publications

References 53 publications

A critical review on the practical use of lithium cycle as an upfront nitrogen removal technology from natural gas

A critical review on the practical use of lithium cycle as an upfront nitrogen removal technology from natural gas

Key problems of gas‐fired power plants participating in peak load regulation: A review

Formation-water evaporation and salt precipitation mechanism in porous media under movable water conditions in underground gas storage

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