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首页> 外文期刊>Fluid Phase Equilibria >Measurement of pure hydrogen and pure carbon dioxide adsorption equilibria for THF clathrate hydrate and tetra-n-butyl ammonium bromide semi-clathrate hydrate
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Measurement of pure hydrogen and pure carbon dioxide adsorption equilibria for THF clathrate hydrate and tetra-n-butyl ammonium bromide semi-clathrate hydrate

机译：THF笼形水合物和四正丁基溴化铵半笼形水合物的纯氢和纯二氧化碳吸附平衡的测量

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摘要

In this work, gas adsorption equilibria for H_2 and for CO_2 with THF clathrate hydrate particles and with tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrate particles (250-355μm) were measured. The structures of the TBAB semi-clathrate hydrates were confirmed with Raman spectroscopy and with differential scanning calorimetry. The THF clathrate hydrate particles had the largest adsorption (ca. 13.7mmol-H2/mol-host) at 269K among all of the hydrates studied. H_2 adsorption at 269K for 2.6mol% TBAB semi-clathrate hydrate (type-B rich) was ca. 6.9mmol-H_2/mol-host and that for 3.7mol% TBAB semi-clathrate hydrate (type-A rich) was ca. 3.4mmol-H_2/mol-host. For CO_2, THF clathrate hydrate had higher adsorption capacity (ca. 68.5 mmol-CO_2/mol-host) than type-A (ca. 16.3 mmol-CO_2/mol-host) or type-B (ca. 29.0 mmol-CO_2/mol-host) semi-clathrate hydrate. Type-B TBAB semi-clathrate hydrate had a larger Langmuir constant ratio (CCO_2/CH_2) than that of THF hydrate. The selectivity of type-B TBAB semi-clathrate hydrate implied by the Langmuir constant ratio can be expected to be large, however the results need to be confirmed with gas mixtures and other conditions including effect of semi-clathrate hydrate particle size.
机译：在这项工作中，测量了H_2和CO_2与THF笼形水合物颗粒和四正丁基溴化铵（TBAB）半笼形水合物颗粒（250-355μm）的气体吸附平衡。用拉曼光谱法和差示扫描量热法证实了TBAB半包合物水合物的结构。在所有研究的水合物中，THF笼形水合物颗粒在269K时具有最大吸附（约13.7mmol-H2 / mol-主体）。 2.6mol％TBAB半包合物水合物（富B型）在269 K时的H_2吸附约为。大约为6.9mmol-H_2 / mol-主体，对于3.7mol％TBAB的半包合物水合物（富含A型），大约为。 3.4mmol-H_2 / mol-主体。对于CO_2，THF笼形水合物的吸附能力（约68.5 mmol-CO_2 / mol-主体）比A型（约16.3 mmol-CO_2 / mol-主体）或B​​型（约29.0 mmol-CO_2 / mol-host）半包合物水合物。 B型TBAB半包合物水合物的朗缪尔常数比（CCO_2 / CH_2）比THF水合物大。 Langmuir常数比值隐含的B型TBAB型半水合物水合物的选择性可以预期很高，但是需要用混合气体和其他条件（包括半水合物水合物粒径的影响）来确认结果。

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