Promoting Methane Hydrate Formation for Natural Gas Storage over Chabazite Zeolites
Promoting Methane Hydrate Formation for Natural Gas Storage over Chabazite Zeolites
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DOI：
10.1021/acsaem.1c02902
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发表时间：
2021-12-15
影响因子：
6.4
通讯作者：
Koh, Carolyn A.
中科院分区：
文献类型：
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作者：
Denning, Shurraya;Majid, Ahmad A. A.;Koh, Carolyn A.
天然气水合物是一种很有前途的甲烷储存方法。本研究探讨了沸石克服水合物形成限制的潜力。菱沸石SSZ-13和SAPO-34将水-水合物转化率分别从5.8 +/-1.4%增加到91.3 +/-0.5%和38.4 +/-1.5%，这是由于沸石的高表面积扩大了气体-水接触面积。SSZ-13促进的水合物生长平均比SAPO-34多2.6倍，这是由于SSZ-13的更疏水性质导致更高的甲烷吸附（可在水合物形成中消耗）和更低的静电性（不限制水活性/取向）。总体而言，SSZ-13保持了其结构完整性，并表现出可重现的水合物形成促进结果。
Gas hydrates are a promising methane storage method. This study investigates the potential for zeolites to overcome hydrate formation limitations. The chabazite zeolites SSZ-13 and SAPO-34 increased water-to-hydrate conversion from 5.8 +/- 1.4% to 91.3 +/- 0.5% and 38.4 +/- 1.5%, respectively, due to the high surface area of the zeolites enlarging the gas-to-water contact area. SSZ-13 promoted on average 2.6 times more hydrate growth than SAPO-34 due to SSZ-13's more hydrophobic nature resulting in higher methane adsorption (can be consumed in hydrate formation) and lower electrostaticity (does not restrict water activity/orientation). Overall, SSZ-13 maintains its structural integrity and exhibits reproducible hydrate formation promotion results.