Activated carbon monoliths by pressureless technique for environmental applications. Issue 5 (19th May 2015)

• Record Type: Journal Article
• Authors: Bajwa, Anjali; Moraga, Francisca; Balakrishnan, Malini; Svensson, Gunnar; Batra, Vidya S.
• Is Part Of: Environmental progress & sustainable energy. Volume 34:Issue 5(2015)
• Page Start: 1420
• Page End: 1426
• Publication Date: 2015-05-19
• Subjects: adsorption -- carbon monolith -- electron microscopy -- powder diffraction -- thermogravimetric analysis; Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.12143
• Languages: English
• ISSNs: 1944-7442

Abstract

Abstract : Carbon monoliths have been prepared through simple procedure by carbonization in inert atmosphere at 550°C from commercial activated carbon and from unburned carbon in waste bagasse fly ash, using two different kinds of phenolic resin binders. The bagasse fly ash was collected from sugar mills where bagasse is used as a biomass based fuel for cogeneration. Commercial activated carbon based monoliths where 5 and 10 wt % of the activated carbon had been replaced by iron oxide (hematite) were also prepared. Results indicate that BET surface area decreases upon carbonization and loading of hematite. Scanning electron microscopy studies shows that the iron oxide is well distributed over the monoliths and X‐ray diffraction shows that it is reduced to magnetite during carbonization. Temperature programmed reduction experiments show that the iron oxides on the monoliths are redox active. The monoliths based on commercial activated carbon show 80% removal of phenol in diluted phenol based water solutions whereas unburned carbon derived monoliths showed 51% removal in similar solution. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1420–1426, 2015