Zeolite based materials for CH4-N2 separation

doi:10.16085/j.issn.1000-6613.2018-1060

Abstract

Abstract:

The high efficient separation of CH₄-N₂ can greatly promote the use of the conventional and unconventional natural gas which is a kind of green and low carbon energy. Zeolite-based adsorbents and membrane materials have excellent gas separation characteristics and great potential for CH₄-N₂ separation. In this review，the state of the art of zeolite adsorbents and membranes for CH₄-N₂ separation was discussed from two aspects：N₂-selective separation（high-concentration methane purification） and CH₄-selective separation（low-concentration methane enrichment）. The structure-activity relationship between the framework and cations of zeolite and its adsorption and separation performance of CH₄-N₂ was analyzed in detail. Combining with the previous work of our group, we proposed that the electroneutral (near-neutral) framework molecular sieve has better separation of CH₄-N₂. Finally, the future trend of molecular sieve adsorbents and membrane materials for CH₄-N₂ separation is summarized and prospected.

Key words: molecular sieves, adsorbents, membranes, methane, separation

摘要：

实现CH₄-N₂高效分离能够极大地推动常规天然气和非常规天然气这一类绿色低碳能源的利用，分子筛基吸附剂和膜材料具有优良的气体分离特性，而且对CH₄-N₂的分离颇具应用潜力。本文从对N₂具有优先选择性吸附的N₂/CH₄分离（高浓度CH₄纯化脱氮）和对CH₄具有优先选择性吸附的CH₄/N₂分离（低浓度CH₄富集脱氮）两方面综述了国内外分子筛吸附剂及分子筛膜的研究进展。详细地分析了分子筛骨架和平衡阳离子与其CH₄-N₂吸附分离性能之间的构效关系，并结合本文作者课题组的工作，提出了电中性（近中性）骨架分子筛对CH₄-N₂分离具有较好的分离效果。最后总结和展望了CH₄-N₂分离用分子筛吸附剂及分子筛膜的未来发展趋势。

关键词: 分子筛, 吸附剂, 膜, 甲烷, 分离

CLC Number:

TQ424.25

LIUJiaqi, Hua SHANG, Xuan TANG, Jiangfeng YANG, Jinping LI. Zeolite based materials for CH₄-N₂ separation[J]. Chemical Industry and Engineering Progress, 2019, 38(01): 449-456.

刘佳奇, 尚华, 唐轩, 杨江峰, 李晋平. 分子筛基CH₄-N₂分离材料的研究进展[J]. 化工进展, 2019, 38(01): 449-456.

Figures/Tables 7

References 45

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分子筛膜	分离系数(α)	N₂渗透速率^①×10⁸ /mol·m^-2 ·s^-1 ·Pa^-1	参考文献
ETS-4	5.4	1	[26]
DD3R	20～45	0.01	[27]
T^②	8.7	0.26	[28]
SSZ-13	9	2	[29]
SAPO-34	5～7	10	[29]
SAPO-34	11.3	40	[30]
SAPO-34	7.4	43	[31]
SAPO-34	8.6	70	[32]
AlPO-18	4.6	100	[33]

分子筛膜	分离系数(α)	N₂渗透速率^①×10⁸ /mol·m^-2 ·s^-1 ·Pa^-1	参考文献
ETS-4	5.4	1	[26]
DD3R	20～45	0.01	[27]
T^②	8.7	0.26	[28]
SSZ-13	9	2	[29]
SAPO-34	5～7	10	[29]
SAPO-34	11.3	40	[30]
SAPO-34	7.4	43	[31]
SAPO-34	8.6	70	[32]
AlPO-18	4.6	100	[33]

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Zeolite based materials for CH₄-N₂ separation

分子筛基CH₄-N₂分离材料的研究进展

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