Organic microporous materials and their interactions with different gases
- Sandia National Labs., Livermore, CA (United States). Materials Chemistry Dept.
- Sandia National Labs., Albuquerque, NM (United States). Organic Materials Processing Dept.
This work explored the interactions of various organic microporous materials with different gases. The authors were attempting to make substances that could separate gases through differential adsorption or store gases at reduced pressures. They synthesized xerogels that were highly crosslinked, allowing relatively large amounts of micro- and mesopores within the organic polymers. The monomers were polymerized in a solvent which was removed forming xerogels. Then exhaustive drying was performed to yield the tested microporous materials. The xerogels were exposed to four gases to observe their gas adsorption affinities (methane, carbon dioxide, hydrogen, and isobutane). For each microporous polymer the authors measured BET surface area, nitrogen isotherm, bulk density, pycnometric density, and equilibrium gas adsorption. Pore volume and pore size distribution were also calculated for some samples. Adsorption characteristics paralleled, but were not directly proportional to surface area or pore size distribution changes. Changes in adsorption magnitude and selectivity have been made through various formulations and derivatization. Increasing polarity showed increased affinities towards carbon dioxide, slightly increased affinities towards isobutane, and unchanged affinities towards methane and hydrogen. These materials could adsorb significant amounts of gas; about half the amount of some commercial carbons. Considering the minimal processing involved in their synthesis, these materials could be cost effective replacements for carbons in low-cost applications where high adsorption efficiencies are not a priority.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10112716
- Report Number(s):
- SAND-96-8240; ON: TI97020624; TRN: AHC29908%%31
- Resource Relation:
- Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
08 HYDROGEN
ORGANIC POLYMERS
CHEMICAL PREPARATION
SORPTIVE PROPERTIES
METHANE
CARBON DIOXIDE
HYDROGEN
2-METHYLPROPANE
ADSORPTION
SEPARATION PROCESSES
PHYSICAL PROPERTIES
EXPERIMENTAL DATA
320302
030400
080100
MATERIALS
PRODUCTS AND BY-PRODUCTS
PRODUCTION