Synthetic zeolites and other microporous oxide molecular sieves
AUTOR(ES)
Sherman, John D.
FONTE
The National Academy of Sciences
RESUMO
Use of synthetic zeolites and other microporous oxides since 1950 has improved insulated windows, automobile air-conditioning, refrigerators, air brakes on trucks, laundry detergents, etc. Their large internal pore volumes, molecular-size pores, regularity of crystal structures, and the diverse framework chemical compositions allow “tailoring” of structure and properties. Thus, highly active and selective catalysts as well as adsorbents and ion exchangers with high capacities and selectivities were developed. In the petroleum refining and petrochemical industries, zeolites have made possible cheaper and lead-free gasoline, higher performance and lower-cost synthetic fibers and plastics, and many improvements in process efficiency and quality and in performance. Zeolites also help protect the environment by improving energy efficiency, reducing automobile exhaust and other emissions, cleaning up hazardous wastes (including the Three Mile Island nuclear power plant and other radioactive wastes), and, as specially tailored desiccants, facilitating the substitution of new refrigerants for the ozone-depleting chlorofluorocarbons banned by the Montreal Protocol.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=34289Documentos Relacionados
- Identification of Extra-Framework Species on Fe/ZSM-5 and Cu/ZSM-5 Catalysts Typical Microporous Molecular Sieves with Zeolitic Structure
- Síntese e Caracterização de Peneiras Moleculares Microcoposas Tipo SAPO-34 e MeAPSO-34
- Vanadium-modified molecular sieves: preparation, characterization and catalysis
- Why are carbon molecular sieves interesting?
- SYNTHESIS OF 2,6-DIMETHYLNAPHTHALENE OVER SAPO-11, SAPO-5 AND MORDENITE MOLECULAR SIEVES