Hydrogen and LNG production from coke oven gas with multi-stage helium expansion refrigeration

Xu, Jingxuan; Lin, Wensheng; Xu, Shilong

doi:10.1016/j.ijhydene.2018.05.137

Cited by 28 publications

(9 citation statements)

References 26 publications

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“…High-purity hydrogen can also be used in the field of fuel cells [6,7]. At present, hydrogen purification has received extensive attention, and various separation techniques have been developed, including cryogenic separation [8], pressure swing adsorption separation (PSA) [9], membrane separation [10,11], hydrate method [12,13], and other methods. The cryogenic separation process is complicated and considered to be highly energy intensive.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

et al. 2022

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A large amount of COG (coke oven gas) is produced from coking plants every year, which contains 55–60% H2. In this work, the breakthrough separation of H2 from COG with ZIF-8/ethylene glycol-water slurry was studied. Following the investigation of the (ab-ad)sorption isotherms of the single component gas CH4 and H2, the main components of coke oven gas, in different slurries and their corresponding viscosities, and the influence of the operating conditions on the dynamic performance of CH4/H2 separation in slurry were studied in a bubble column. Low temperature, inlet flow rate, high pressure, and solid content can extend the breakthrough time, where the longest breakthrough time interval between H2 and CH4 can be as long as 70 min, meaning the high purity of H2 product could be obtained easily. All the results of this work prove the feasibility of the slurry method to separate CH4/H2 mixture and provide a theoretical basis for practical industrial applications.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

et al. 2022

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“…The CH4 purity of natural gas produced by COG is over 99% and the existing gas supply pipeline can be used. Therefore, it has the advantages of simple storage and easy transmission, which can be directly merged with the natural gas pipeline network of the West-East Gas Pipeline project to supply to cities [10][11] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Flame Propagation Characteristics of Premixed Laminar Combustion of Hydrogen-rich Coke Oven Gas

2022

J. Phys.: Conf. Ser.

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Coke oven gas (COG) is the main by-product of the coking industry, with a hydrogen content of more than 50%. Upon purification, COG can be used as a hydrogen-rich, efficient, high-quality alternative fuel, to improve the energy structure, alleviate global warming, and reduce polluting emissions. In the present paper, a constant-volume combustion experiment bench was established to carry out the premixed laminar combustion experiments of the COG-air mixture. A high-speed camera was used to record the flame propagation process and the effects of the influencing factors such as fuel-air equivalence ratio, initial pressure and H2 concentration on the flame speed. The results indicated that when Φ= 1.1, i.e., for a relatively concentrated fuel, the flame speeds of the stretched and unstretched flame both reached a maximum. With the increase in initial pressure, the flame speeds of both the stretched and unstretched flame decreased. As the H2 concentration increased, the propagation speeds of the stretched and unstretched flame both increased and the enhancements were more obvious; mainly since hydrogen combusts faster than methane.

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“…In another paper of Lin et al, the influence of hydrogen content on the liquefied process of COG was also discussed. Cryogenic systems of coproducing liquid hydrogen and LNG from hydrogen–methane mixtures were also investigated by some authors. − Hydrogen shows extremely different thermal properties compared with other components. Similar to the significant effect on the liquefaction processes, hydrogen is also very likely to have a great effect on the solubilities of the impurities in the liquefied CH 4 /H 2 mixtures.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures

Lin

2021

J. Chem. Eng. Data

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Methane-rich industrial byproducts, such as coke oven gas (COG) and synthetic ammonia exhaust tail gas, are often regarded as promising sources of unconventional natural gas. The design spec for liquefaction of these kinds of unconventional natural gas is quite different from that of conventional natural gas due to the presence of some special substances, such as hydrogen. In this work, CO2 solubility in liquid CH4/H2 mixtures is measured utilizing a static solid–liquid equilibrium (SLE) experimental apparatus. The experiments are carried out at cryogenic temperatures between 90 and 150 K in the pressure range of about 1.7–5.4 MPa. The results are compared with calculations based on the GERG-2008 and Peng–Robinson (PR) equations of state. It is found that, compared with the solubility of CO2 in pure methane, the existence of hydrogen makes CO2 solubility increase significantly between −160 and −145 °C and decrease significantly at temperatures above −140 °C. The results provide the basis for the CO2 purification system of the coke oven gas and synthetic natural gas liquefaction plant.

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Hydrogen and LNG production from coke oven gas with multi-stage helium expansion refrigeration

Cited by 28 publications

References 26 publications

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

Experimental Study on Flame Propagation Characteristics of Premixed Laminar Combustion of Hydrogen-rich Coke Oven Gas

Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures

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Hydrogen and LNG production from coke oven gas with multi-stage helium expansion refrigeration

Cited by 28 publications

References 26 publications

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

Experimental Study on Breakthrough Separation for Hydrogen Recovery from Coke Oven Gas Using ZIF-8 Slurry

Experimental Study on Flame Propagation Characteristics of Premixed Laminar Combustion of Hydrogen-rich Coke Oven Gas

Experimental and Theoretical Study of CO2 Solubility in Liquid CH4/H2 Mixtures at Cryogenic Temperatures

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Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures