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首页> 外文期刊>Journal of Chemical and Engineering Data: the ACS Journal for Data >Methane Hydrate Uptake of MCM-41 Mesoporous Molecular Sieves with Preadsorbed Water
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Methane Hydrate Uptake of MCM-41 Mesoporous Molecular Sieves with Preadsorbed Water

机译：甲烷水合物摄取MCM-41中孔分子筛，具有预侵入水

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摘要

Ordered meosoporous molecular sieves of MCM-41 were prepared by adjusting the pH with acetic acid. The synthesized samples were evaluated by 77 K nitrogen-adsorption data. The sample synthesized by a onetime pH adjustment has the same good characters as that synthesized by a three-times pH adjustment. The morphology and crystal structure of the calcined MCM-41 materials were examined with XRD and TEM, in which the ordered channel structure was confirmed. The sorption equilibrium isotherms of wet samples showed a sharp rise, because the large amount methane hydrate had been formed in the MCM-41 samples' porous space. The methane sorption amount of the mesoporous MCM-41 sample with preadsorbed water reached 10.87 mmol at R-W, = 2.0, which was 2.97 times that of the dry mesoporous MCM-41 sample. The comparative methane sorption capacities of the three ordered mesoporous materials (MCM-41, SBA-15, and large-pore MCM-41) by preadsorbtion of the same water mass (R-W, = 2.0) are almost identical, and no previous articles have reported similar results for the mesoporous materials. However, the methane hydrate formation pressures of the three samples are different due to the pore diameter effect.
机译：通过用乙酸调节pH来制备MCM-41的有序强孔分子筛。通过77k氮吸附数据评价合成样品。通过甘氨酸的pH调节合成的样品具有与三次pH调节合成的良好性状相同。用XRD和TEM检查煅烧的MCM-41材料的形态和晶体结构，其中确认了有序通道结构。湿式样品的吸附平衡等温线显示出急剧上升，因为在MCM-41样品的多孔空间中形成了大量甲烷水合物。甲烷的MCM-41样品的甲烷吸附量与预放入水的样品达到10.87mmol，R-W，= 2.0，其为干介孔MCM-41样品的2.97倍。通过对相同水质量（RW，= 2.0）的预乙基（RW，= 2.0）的三个有序的介孔材料（MCM-41，SBA-15和大孔MCM-41）的对比甲烷吸收能力几乎相同，并且没有先前的文章报告了介孔材料的类似结果。然而，由于孔径效应，三个样品的甲烷水合物形成压力不同。

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