Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 21, Pages 5964-5972Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm1021068
Keywords
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Funding
- U.S. Department of Energy [DE-FC36-07GO17033, DE-SC0001015]
- National Science Foundation [CHE-0930079, CHE-0911207]
- Welch Foundation [A-1706]
- German CFN [C5.2]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0911207] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0930079] Funding Source: National Science Foundation
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Three porous polymer networks (PPNs) have been synthesized by the homocoupling of tetrahedral monomers. Like other hyper-cross-linked polymer networks, these materials are insoluble in conventional solvents and exhibit high thermal and chemical stability. Their porosity was confirmed by N-2 sorption isotherms at 77 K. One of these materials, PPN-3, has a Langmuir surface area of 5323 m(2) g(-1). Their clean energy applications, especially in H-2: CH4, and CO2 storage, as well as CO2/CH4 separation, have been carefully investigated. Although PPN-1 has the highest gas affinity because of its smaller pore size, the maximal gas uptake capacity is directly proportional to their surface area. PPN-3 has the highest H2 uptake capacity among these three (4.28 wt %, 77 K). Although possessing the lowest surface area, PPN-1 shows the best CO2/CH4 selectivity among them.
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