Cu-TDPAT, an rht-Type Dual-Functional Metal鈥揙rganic Framework Offering Significant Potential for Use in H2 and Natural Gas Purification Processes Operating at High Pressures

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• 作者：Haohan Wu ; Kexin Yao ; Yihan Zhu ; Baiyan Li ; Zhan Shi ; Rajamani Krishna ; Jing Li
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：August 9, 2012
• 年：2012
• 卷：116
• 期：31
• 页码：16609-16618
• 全文大小：645K
• 年卷期：v.116,no.31(August 9, 2012)
• ISSN：1932-7455

文摘

The separations of CO₂/CO/CH₄/H₂, CO₂/H₂, CH₄/H₂, and CO₂/CH₄ mixtures at pressures ranging to 7 MPa are important in a variety of contexts, including H₂ production, natural gas purification, and fuel-gas processing. The primary objective of this study is to demonstrate the selective adsorption potential of an rht-type metal鈥搊rganic framework [Cu₃(TDPAT)(H₂O)₃]路10H₂O路5DMA (Cu-TDPAT), possessing a high density of both open metal sites and Lewis basic sites. Experimental high pressure pure component isotherm data for CO₂, CO, CH₄, and H₂ are combined with the Ideal Adsorbed Solution Theory (IAST) for estimation of mixture adsorption equilibrium. The separation performance of Cu-TDPAT is compared with four other microporous materials, specifically chosen in order to span a wide range of physicochemical characteristics: MgMOF-74, MIL-101, LTA-5A, and NaX. For all mixtures investigated, the capacity of Cu-TDPAT to produce the desired product, H₂ or CH₄, satisfying stringent purity requirements, in a fixed bed operating at pressures exceeding about 4 MPa, is either comparable to, or exceeds, that of other materials.