Adsorption, separation and regeneration of cation-exchanged X zeolites for LNG purification: Li+, K+, Mg2+ and Ca2+

Sun, Yongbiao; Tang, Jianfeng; Li, Guangyan; Hua, Yihuai; Sun, Yunbing; Hu, Suyang; Wen, Xin

doi:10.1016/j.micromeso.2022.112032

Cited by 16 publications

(10 citation statements)

References 42 publications

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“…Many appropriate methods have been developed for CCS, separation of CO 2 from streams containing CH 4 and N 2 in liquefied natural gas (LNG) purification, pre- or postcombustion processing, flue gas, and landfill gases. − Furthermore, one of the problematic issues in natural gas processing is CO 2 freezing and corrosion of pipelines at cryogenic temperatures. This phenomenon leads to a reduced lifetime of industrial equipment.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Najafi,

Khorasheh,

Soltanali

et al. 2023

Langmuir

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The adsorption equilibria and kinetic performance of CO 2 , CH 4 , and N 2 on pelletized cation-exchanged faujasite zeolites (with alkali, alkaline earth, and transition metal ions) have been investigated by an innovative volumetric apparatus simultaneously. The standard instrumental analytical techniques, including X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy (EDX), and atomic absorption spectroscopy (AAS), were utilized to characterize binder-free modified zeolites. EDX and AAS analyses revealed that the ion exchange was successfully achieved. The results indicate that the type of cation present in the zeolite framework and the Si/Al ratio can have a significant impact on the adsorption capacity and kinetic performance. The obtained isotherms were determined by three isotherm models, and the Langmuir−Freundlich (Sips) model was found to show the best agreement with the experimental isotherm data for all gases. The CO 2 uptakes of KX, MgX, and CaX reached 4.13, 4.79, and 5.48 mmol/g, respectively. The effective binary and kinetic selectivities of CO 2 /CH 4 and CO 2 /N 2 were also calculated. Among all samples, KX showed the highest CO 2 /CH 4 and CO 2 /N 2 selectivities of 54.46 and 91.62, respectively. Pseudo-first-, pseudo-second-order, and Avrami kinetic models were fitted to the experimental kinetic data to analyze the adsorption kinetics. Finally, the macropore diffusion coefficient (D p ) and microporous diffusional time constant (D c /r c 2 ) were estimated by correlating the micropore−macropore kinetic model with the experimental fractional uptake curves. Among the ion-exchanged zeolite samples, the K + form exhibits a suitable performance in terms of kinetic behavior and adsorption capacity.

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Section: Introductionmentioning

confidence: 99%

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Najafi,

Khorasheh,

Soltanali

et al. 2023

Langmuir

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“…The degassing procedure for original samples had been described in detail in the published paper [16]. The regenerations of CO 2 saturated samples were performed in 3 ways: (1) the vacuum regeneration was carried out using the vacuum pump, and the vacuum pressure can be regulated;(2) the purge regeneration was performed by introducing purge gas at various flowrates, which was controlled by mass flow controller (MFC);(3) the heating regeneration was carried out in the tube furnace at certain temperature with the heating rate of 5 °C/min.…”

Section: Methodsmentioning

confidence: 99%

“…The equilibrium adsorption isotherms were determined based on the volumetric method, whereas the adsorption capacities of CO 2 were calculated using the pressure difference before and after the equilibrium. The information of some important apparatus and the detailed procedure of the adsorption experiment can be referred to the published paper [16].…”

Section: Methodsmentioning

confidence: 99%

“…Figure 3 shows the isosteric heats of adsorption as a function of CO 2 loadings for JLOX500 and 13X. With the increase of CO 2 loadings from 0 to 2.50 mmol/g, the isoteric heats of adsorption for both zeolites decreased rapidly at the low-loading region, and gradually at the high-loading region [16]. It suggested that CO 2 gaseous molecules firstly occupied the adsorption sites of adsorbent surfaces, and their number was reduced with more CO 2 molecules exposed to the zeolite surface [10].…”

Section: (B) (13x-co 2 )mentioning

confidence: 99%

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Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

Sun,

Tang,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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This work presented a comparative study of CO2 regeneration for two kinds of X zeolites (JLOX500 and 13X) in different ways, such as vacuum, CH4 purge and heating regeneration. The materials characteristics of samples were determined by EDS and BET. The adsorption capacities of CO2 for original and regenerated samples were identified as the single-point adsorption dosing CO2 at 800 kPa. The results showed that JLOX500 had larger original adsorption capacity (OAC) of CO2 (4.83 mmol/g) than that of 13X (4.10 mmol/g). In vacuum regeneration, the regenerated adsorption capacities (RAC) of CO2 for both samples were almost same at all vacuum pressures (1 ~ 100 kPa); in CH4 purge regeneration, the regeneration degree (RD) for both samples were identical to each other with the flowrates (50 ~ 300 mL/min); in heating regeneration, JLOX500 had larger RACs than 13X at temperatures (50 ~ 300 °C), but had less RDs. The RACs and RDs for JLOX500 and 13X both increased as the regeneration time was prolonged. 13X would be more efficient adsorbent in the vacuum regeneration, whereas JLOX500 performed better in purge and heating regeneration.

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“…The anode materials based on lithium storage mechanisms of conversion reaction or alloying reaction generally exhibit higher theoretical special capacities due to multielectron transfer during electrochemical reactions, which can be promising thin film anodes applied in lithium-ion microbatteries. Up till now, most of the reported papers focus on various metal oxide and Si-based thin film anodes, such as Cr 2 O 3 [3], MnO [4], WO 3 [5], Cu x O-TiO 2 (x=1, 2) [6], MoO 2 [7], SnO 2 [8], multilayer C/Si [9,10], sandwich-like Ti/Si/Ti [11], Ni-Si [12], Si (1−x) Ge x [13] and composite Si-O-C [14] thin films. However, for the dense thin film anodes with high specific capacity, the huge stress and the significant volume strain originated from repeated insertion/extraction of large amounts of Li + ions are difficult to mitigate without obvious change in electrode structure.…”

Section: Introductionmentioning

confidence: 99%

High-performance Ti-doped ZnS thin film anode for lithium-ion batteries

Jiang¹,

Zeng²,

Zhang³

et al. 2022

Nanotechnology

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Thin film microbattery is urgently needed to provide a long-term stable on-chip power for various kinds of microdevices or microsystems. Anode is a core component in thin film lithium ion microbattery, however, previous researches mostly focused on metal oxide or Si-based thin film anodes, and the reports of metal sulfide thin film anodes are limited. Herein, we present a new type of Ti-doped ZnS thin film fabricated by radio frequency (RF) magnetron co-sputtering. The Ti doping is designed to enhance the overall electrical conductivity of the ZnS thin film, since the insulation of ZnS is one of the major barriers to deliver its lithium storage performance. As an anode applied in lithium ion battery, the Ti-doped ZnS thin film exhibits good cycling stability up to 500 cycles at a current density of 1.0 A·g-1, and remains a higher specific capacity of 463.1 mAh·g-1 than that of the pure ZnS thin film, showing its better electrochemical reaction reversibility. The rate capability and EIS measurements manifest the more favorable electrochemical reaction kinetics of the Ti-doped ZnS thin film, moreover, the CV tests at various scan rates indicate the improved Li+ diffusion kinetics in the electrode after Ti doping.

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Adsorption, separation and regeneration of cation-exchanged X zeolites for LNG purification: Li+, K+, Mg2+ and Ca2+

Cited by 16 publications

References 42 publications

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

High-performance Ti-doped ZnS thin film anode for lithium-ion batteries

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Adsorption, separation and regeneration of cation-exchanged X zeolites for LNG purification: Li+, K+, Mg2+ and Ca2+

Cited by 16 publications

References 42 publications

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO2, CH4, and N2 Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO2, CH4, and N2 Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Experiment investigation of CO2 regeneration properties for JLOX500 and 13X in various ways

High-performance Ti-doped ZnS thin film anode for lithium-ion batteries

Contact Info

Product

Resources

About

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO₂, CH₄, and N₂ Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways