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Wiersum, Andrew D.,Giovannangeli, Christophe,Vincent, Dominique,Bloch, Emily,Reinsch, Helge,Stock, Norbert,Lee, Ji Sun,Chang, Jong-San,Llewellyn, Philip L. American Chemical Society 2013 ACS combinatorial science Vol.15 No.2
<P>A high-throughput gas adsorption apparatus is presented for the evaluation of adsorbents of interest in gas storage and separation applications. This instrument is capable of measuring complete adsorption isotherms up to 40 bar on six samples in parallel using as little as 60 mg of material. Multiple adsorption cycles can be carried out and four gases can be used sequentially, giving as many as 24 adsorption isotherms in 24 h. The apparatus has been used to investigate the effect of metal center (MIL-100) and functional groups (CAU-10) on the adsorption of N<SUB>2</SUB>, CO<SUB>2</SUB>, and light hydrocarbons on MOFs. This demonstrates how it can serve to evaluate sample quality and adsorption reversibility, to determine optimum activation conditions and to estimate separation properties. As such it is a useful tool for the screening of novel adsorbents for different applications in gas separation, providing significant time savings in identifying potentially interesting materials.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/acsccc/2013/acsccc.2013.15.issue-2/co300128w/production/images/medium/co-2012-00128w_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/co300128w'>ACS Electronic Supporting Info</A></P>
Wiersum, Andrew D.,Chang, Jong-San,Serre, Christian,Llewellyn, Philip L. American Chemical Society 2013 Langmuir Vol.29 No.10
<P>An adsorbent performance indicator (API) is proposed in an effort to initially highlight porous materials of potential interest for PSA separation processes. This expression takes into account working capacities, selectivities, and adsorption energies and additionally uses weighting factors to reflect the specific requirements of a given process. To demonstrate the applicability of the API, we have performed the adsorption of carbon dioxide and methane at room temperature on a number of metal–organic frameworks, a zeolite and a molecular sieve carbon. The API is calculated for two different CO<SUB>2</SUB>/CH<SUB>4</SUB> separation case scenarios: “bulk separation” and “natural gas purification”. This comparison highlights how the API can be more versatile than previously proposed comparison factors for an initial indication of potential adsorbent performance.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2013/langd5.2013.29.issue-10/la3044329/production/images/medium/la-2012-044329_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la3044329'>ACS Electronic Supporting Info</A></P>