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Porous Adsorbents for Vehicular Natural Gas Storage: A Review 总被引:6,自引:0,他引:6
Methane adsorption data (both experimental and simulated) under conditions of direct relevance for vehicular natural gas storage, i.e., at 500 psig and ambient temperature, has been compiled from the literature for various microporous adsorbents and discussed in this work. Characterization of microporosity has been briefly reviewed, followed with a discussion on the porous structure of natural gas adsorbents. A common trend of gravimetric methane adsorption capacity scaling with surface area among the diverse microporous adsorbents (viz., coals, carbons, zeolites, silica gel and an MCM-41 type material) is demonstrated. Further, it is substantiated and emphasized that increasing the adsorbent surface area on a volumetric basis is very important for vehicular natural gas storage where the fuel storage volume is a constraint. The effect of other adsorbent properties such as heat of adsorption and heat capacity on the natural gas storage capacity is also discussed. 相似文献
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金属有机骨架材料(MOFs)作为一类配位聚合物,具有孔洞结构、高比表面和独特的化学调变性。后合成修饰(PSM)能为MOFs的骨架引进新的官能团,改变MOFs的孔道环境,调变MOFs骨架的理化性质,有利于MOFs在更专属、更复杂领域的应用。本文对金属有机骨架材料(MOFs)在合成修饰中的应用进行了综述。 相似文献
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天然气泄漏事故在城市环境中不断发生。为了了解不同城市环境和平坦地势中天然气泄漏的规律,根据流体力学规律,建立了不同环境中天然气泄漏的数学模型,模拟天然气泄漏后的分布规律。结果显示:由于环境的不同,导致不同环境中空气流速分布不一样,从而引起城市与平坦地势天然气泄漏规律不一致。我们在制定天然气泄漏应急措施时,需根据环境的不同,制定不一样的措施。 相似文献
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The modification of covalent organic frameworks (COFs) based on postsynthetic covalent linkages is discussed in this review. In this strategy, the COF is preparedas scaffold and then assembled with functional groups with preservation of structural skeleton. Recent studies indicate that a number of COFs, such as COF-5 and 3D-OH-COOF, are controllable to postsynthetic modification. Furthermore, covalentmodifications including triazole, ester, amide, sulfide, o-carbamate, ether, and oxime are suitable for postsynthetic functionalization. The rapid development of postsynthetic modification demonstrates that this approach will provide a general platform to create COFs as robust functional porous materials for wide applications. 相似文献
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Storing natural gas in wet active carbon is a recently proposed method. The research progress shows that this method considerably decreases the storage pressure while maintaining the storage capacity equal to or even higher than compressed natural gas (CNG). There is no requirement of pre-sifting any component out of natural gas for the storage, and the thermal effect on fast charging/discharging has almost no effect on the storage capacity. The charging and discharging processes are reversible and show good dynamic behavior. Although the storage temperature is a little lower than the ambient, the new method seems technically and costly more competitive than the available methods. 相似文献
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在天然气的运输工程中,一旦发生管道腐蚀问题,就会导致漏气、火灾等安全隐患,给人民的生活生产带来严重影响。通过分析目前天然气储运过程中管道腐蚀的原因以及防腐的措施,为相关人员给予参考。 相似文献
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作为绿色能源,氢能受到了广泛关注,而先进的储氢方法则是实现氢能规模应用的关键之一。介绍了多孔金属-有机骨架(MOFs)储氢材料的研究现状、存在的问题、引入裸露金属中心的方法、裸露金属中心元素类型及配位环境对储氢性能的影响。 相似文献
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坡面天然气管道泄漏扩散数值模拟 总被引:1,自引:0,他引:1
利用CFD仿真软件对坡面天然气泄漏扩散过程进行了数值模拟,分析了泄漏扩散过程,风速及泄漏倾角对泄漏扩散的影响。研究结果表明,泄漏1 s内,甲烷主要集中在坡面附近;泄漏5 s时,甲烷已经扩散到整个区域,且浓度爆炸下限最高达到7.81 m,在地表及坡面形成了涡流;随着泄漏倾角的增加,危险区域逐渐增大;泄漏倾角为15°时,风速影响较小,泄漏倾角为10°时,风速影响较大,泄漏气体主要沿地表扩散;为天然气安全输送及紧急预案的制定提供一定的理论依据。 相似文献
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《Propellants, Explosives, Pyrotechnics》2017,42(11):1296-1302
Energetic metal organic frameworks (MOFs) with energetic anions as ligands can be used as new‐generation explosives. Many powerful anions have been introduced into energetic MOFs to improve the properties; however, the hydroxyl as a common group for energetic MOFs has rarely been studied. In this article, we present two examples of energetic MOFs ([Cu(atz)(NO3)(OH)]n) and [Zn(ata)(OH)] (atz=4‐amino‐1,2,4‐triazole; ata=5‐amino‐1H‐tetrazole) with the hydroxyl group as the ligand. Crystal structure analyses reveal that the two compounds possess compact two‐dimensional (2‐D) structures with densities up to 2.41 g cm−3 and 2.54 g cm−3, respectively. These two compounds have excellent physicochemical properties. The results demonstrate that a hydroxyl group as the ligands could commendably increase the densities of energetic MOFs, thereby enhancing the detonation performance. It is anticipated this work will open a new direction for the development of energetic MOFs. 相似文献
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随着时代的不断发展,我国关于油气储运相关技术的研究不断深入。在总结油气储运技术发展历史的背景上,阐述了输送工艺的进展。结合时代背景与历史情况提出了我国油气储运技术所存在的问题。 相似文献
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介绍了“西气东输”的可能性、必要性及其工程概貌,还介绍了我国天然气利用现状与前景。对其如何取得预期效果也提出了要求。 相似文献