High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane

Li, Xinping; Wang, Yaowei; Wu, Tangyin; Song, Shigeng; Wang, Bin; Zhong, Shengwen; Zhou, Rongfei

doi:10.1016/j.cjche.2020.02.004

Cited by 27 publications

(14 citation statements)

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“…Our previous SSZ-13 membranes prepared by conventional hydrothermal synthesis displayed a N 2 permeance of 1.1× 10 −7 mol m −2 s −1 Pa −1 and a N 2 /CH 4 selectivity of 13 for an equimolar mixture at 0.2 MPa pressure drop. 23 The permeance and selectivity were 29 and 14% lower than these of current membranes prepared by the SAC method. The volume ratio of an empty space to the liquid was as large as 28 by the current SAC method, which was much higher than that (less than 0.5) by conventional hydrothermal synthesis.…”

Section: Resultsmentioning

confidence: 87%

“…More than 95% of the solution was saved compared with that by conventional hydrothermal synthesis in our previous studies. 23,44 The membrane growth was carried out by the SAC method, as shown in Figure 2b. The seeded and solution-sucked supports were grown to continuous SSZ-13 membranes at 453 K for 2−8 days, as shown in Figure 2b.…”

Section: Methodsmentioning

confidence: 99%

“…Hazazi et al reported a N 2 -selective CMS membrane with a N 2 permeance of 0.7 barrers and a N 2 /CH 4 ideal selectivity of 35. Small-pore zeolites such as SAPO-34, − SSZ-13, − and AlPO-18 have been made into continuous membranes for N 2 /CH 4 separation. Li et al prepared a SAPO-34 membrane with a N 2 permeance of 1.7 × 10 –7 mol m –2 s –1 Pa –1 (∼500 GPU, 1 GPU = 3.35 × 10 –10 mol m –2 s –1 Pa –1 ) and a N 2 /CH 4 selectivity of 8.0.…”

Section: Introductionmentioning

confidence: 99%

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An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Liu

et al. 2020

Energy Fuels

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Thin and high-quality SSZ-13 membranes were synthesized by the steam-assisted conversion (SAC) method for the first time. More than 95% gel/solution was saved for membrane growth compared with conventional hydrothermal synthesis. Another advantage for the SAC method was that the competitive crystallization between the bulk solution and support was eliminated. The thickness of SSZ-13 membranes was well controlled from 1.2 to 3.0 μm by the dilution of sucked solution and synthesis time. Three membranes prepared under optimized conditions displayed N 2 permeances of (1.4 ± 0.12) × 10 −7 mol m −2 s −1 Pa −1 (∼418 GPU), N 2 /CH 4 selectivities of 14.8 ± 0.45 and a separation index of 0.19 ± 0.02 mol m −2 s −1 at 298 K, and 0.2 MPa pressure drop for an equimolar N 2 /CH 4 mixture. The membranes synthesis by the SAC method had a good reproducibility. Such separation performances of current SSZ-13 membranes were beyond the upper bound for N 2 /CH 4 separation among the reported membranes. The influences of temperature, pressure drop, and feed flow rate on separation performance of the membranes were investigated. High-pressure N 2 /CH 4 separation was also reported using SSZ-13 membranes at the pressure drop up to 2.5 MPa.

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Section: Resultsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Liu

et al. 2020

Energy Fuels

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“…This indicates that there might be a need to reduce the pressure of the gas and re-compress it again, as is the case in CH 4 -permeable membranes. Yet, PBI mixed-matrix membrane and SSZ-13 zeolite membrane have shown considerable performance over other membranes as they have an order of magnitude higher permselectivities compared to other membranes [55,57,58].…”

mentioning

confidence: 99%

“…The direction of membrane research for CH 4 /N 2 separation in the literature is similar to that of adsorption: the majority is focused on the design of the membrane and testing its permeance and selectivity without considering real-life scenarios or discussing the product purity and recovery obtained, as can be seen in Table 2 [44,45,[54][55][56][57][58]. All types of membranes formerly described have been tested for CH 4 /N 2 separation.…”

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confidence: 99%

Prospective of Upfront Nitrogen (N2) Removal in LNG Plants: Technical Communication

et al. 2021

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Conventional natural gas (NG) liquefaction processes remove N2 near the tail of the plant, which limits production capacity and decreases energy efficiency and profit. Engineering calculations suggest that upfront N2 removal could have substantial economic benefits on large-scale liquefied natural gas (LNG) processes. This article provides an overview of the most promising technologies that can be employed for upfront N2 removal in the LNG process, focusing on the process selection and design considerations of all currently available upfront N2 removal technologies. The literature review revealed that although adsorption has proven to be a huge success in gas separation processes (efficiency ≥ 90%), most of the available adsorbents are CH4-selective at typical NG conditions. It would be more encouraging to find N2-selective adsorbents to apply in upfront N2 removal technology. Membrane gas separation has shown growing performance due to its flexible operation, small footprint, and reduced investment cost and energy consumption. However, the use of such technology as upfront N2 removal requires multi-stage membranes to reduce the nitrogen content and satisfy LNG specifications. The efficiency of such technology should be correlated with the cost of gas re-compression, product quality, and pressure. A hybrid system of adsorption/membrane processes was proposed to eliminate the disadvantages of both technologies and enhance productivity that required further investigation. Upfront N2 removal technology based on sequential high and low-pressure distillation was presented and showed interesting results. The distillation process, operated with at least 17.6% upfront N2 removal, reduced specific power requirements by 5% and increased the plant capacity by 16% in a 530 MMSCFD LNG plant. Lithium-cycle showed promising results as an upfront N2 chemical removal technology. Recent studies showed that this process could reduce the NG N2 content at ambient temperature and 80 bar from 10% to 0.5% N2, achieving the required LNG specifications. Gas hydrate could have the potential as upfront N2 removal technology if the is process modified to guarantee significant removals of low N2 concentration from a mixture of hydrocarbons. Retrofitting the proposed technologies into LNG plants, design alterations, removal limits, and cost analysis are challenges that are open for further exploration in the near future. The present review offers directions for different researchers to explore different alternatives for upfront N2 removal from NG.

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A High‐Performance N₂‐Selective MXene Membrane with Double Selectivity Mechanism for N₂/CH₄ Separation

Xing,

Cong,

Wang

et al. 2023

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Membrane‐based separation process for unconventional natural gas purification (mainly N2/CH4 separation) has attracted more attention due to its considerable economic benefits. However, the majority of separation membranes at this stage, particularly N2‐selective membranes, achieve the desired separation target by mainly relying on the diffusivity‐selectivity mechanism. To overcome the limitation of a single mechanism, 2D lamellar MXene membranes with a double selectivity mechanism are prepared to enhance N2 permeance and N2/CH4 selectivity via introducing unsaturated metal sites into MXene, which can form specific interactions with N2 molecules and enhance N2 permeation. The resulting membranes exhibit an inspiring N2/CH4 separation performance with an N2 permeance of 344 GPU and N2/CH4 selectivity of 13.76. The collaboration of the double selectivity mechanism provides a new idea for the development of a novel N2‐selective membrane for N2 removal and CH4 purification, which further broadens the application prospects of membrane separation technology in the field of unconventional natural gas purification.

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High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane

Cited by 27 publications

References 49 publications

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

Prospective of Upfront Nitrogen (N2) Removal in LNG Plants: Technical Communication

A High‐Performance N₂‐Selective MXene Membrane with Double Selectivity Mechanism for N₂/CH₄ Separation

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High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane

Cited by 27 publications

References 49 publications

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N2/CH4 Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N2/CH4 Separation

Prospective of Upfront Nitrogen (N2) Removal in LNG Plants: Technical Communication

A High‐Performance N2‐Selective MXene Membrane with Double Selectivity Mechanism for N2/CH4 Separation

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An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

An Effective Approach to Synthesize High-Performance SSZ-13 Membranes Using the Steam-Assisted Conversion Method for N₂/CH₄ Separation

A High‐Performance N₂‐Selective MXene Membrane with Double Selectivity Mechanism for N₂/CH₄ Separation