Improved activated carbon by thermal treatment in methane and steam: Physicochemical influences on MIB sorption capacity

J. R. Rangel-Mendez, F. S. Cannon

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Thermal treatment by steam or by methane plus steam altered the physicochemical properties of a commercial lignite-based activated carbon; and improved the carbon's sorption capacity for the odorant 2-methylisoborneol (MIB). Rapid small scale column tests (RSSCTs) revealed that favorable thermal treatment allowed an activated carbon to remove this odorant for up to six times longer before initial MIB breakthrough than did its commercial lignite counterpart. For these RSSCTs (135ppt), clarified water from a water treatment plant (2.07mg/L TOC) was spiked with 14C-MIB; and liquid scintillation protocols facilitated 14C-MIB detection at 1-3ppt. The more favorable thermal treatment at 1000°C increased pore volumes with 5-400Å widths by twofold; and the bed volume to initial MIB breakthrough correlated fairly well (R2 - 0.9) with pore volume in the range of 5-60 or 5-400Å. Thermal tailoring altered the carbon's apparent point of zero charge: from pH6.5 for the commercial lignite carbon, to pH9.2 for tailored carbon. When methane and steam were used together, the C, H, N and O contents were virtually the same as for the commercial lignite. In contrast, when steam was employed alone, the percent of oxygen increased, and the percent of H, C and N therefore decreased slightly.

Original languageEnglish (US)
Pages (from-to)467-479
Number of pages13
JournalCarbon
Volume43
Issue number3
DOIs
StatePublished - Jan 3 2005

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Improved activated carbon by thermal treatment in methane and steam: Physicochemical influences on MIB sorption capacity'. Together they form a unique fingerprint.

Cite this