Synthesis and Characterization of Silver Hollandite and its Application in Emission Control

Journal Article · Tue Aug 23 00:00:00 EDT 2005 · Chemistry of Materials

DOI:https://doi.org/10.1021/cm0506508· OSTI ID:15020819

Li, Liyu; King, David L

Silver hollandite, Ag1.8Mn8O16, has been synthesized by ion exchange of cryptomelane in AgNO3 melt. Compared to the previously described synthesis process, thermal decomposition of AgMnO4 at 970 C under 5 kbar oxygen for 7 days, this newly developed synthesis process is easily carried out, enabling synthesis of significant quantities for evaluation, testing, and scale up. Silver hollandite prepared by this new method has much smaller crystal size and thus much higher surface area compared with the previously available material. Application of silver hollandite for emission control has been examined. This material is an excellent low temperature SO2 absorbent as well as a highly active catalyst for CO and NO oxidation. Silver-hollandite maintains its catalytic oxidation activity even while it is simultaneously aging by adsorption of SO2.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15020819
• Report Number(s): PNNL-SA-44400; 5395; 9604; VT0403000; TRN: US200521%%270
• Journal Information: Chemistry of Materials, Vol. 17, Issue 17
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
SILVER COMPOUNDS
MANGANATES
HOLLANDITE
ION EXCHANGE
SYNTHESIS
CRYSTAL STRUCTURE
AIR POLLUTION CONTROL
ADSORBENTS
SULFUR DIOXIDE
CARBON MONOXIDE
NITRIC OXIDE
OXIDATION
CATALYTIC EFFECTS
environmental molecular sciences laboratory
silver hollandite
SO2 absorber
sulfur dioxide trap
diesel emissions control