Phase transfer catalysed permanganate oxidation of three British bituminous coals

Bioassay of chemically treated subbituminous coal derivatives using Pseudomonas putida F1

“…In contrast, higher fluorescence intensity was observed in the aromatic/ PAH region for the low concentration pretreatments. Based on the literature (Arndt, 1975;Burke et al, 1990;Hayatsu et al, 1981) it is speculated that the aromatics/PAH fraction decreased more rapidly at the higher concentration due to the over-oxidation of phenolic rings, polynuclear aromatic moieties, and heteroaromatic structures which resulted in higher pH values (~8.5).…”

“…Numerous studies have been performed to investigate the structure of coal and evaluate desulfurization, gasification and other processes (Alvarez et al, 2003;Burke et al, 1990;Deno et al, 1981;Hayatsu et al, 1981;Ike et al, 2011;Mae et al, 1997;Miura, 2000;Miura et al, 1996;Moliner et al, 1983;Palmer et al, 1994;Pignatello et al, 2006;Rodriguez et al, 1996Rodriguez et al, , 1997Yang et al, 1985). However, there has been little published information concerning the use of chemical reagents to pretreat subbituminous coals for the purpose of enhancing formation of biogenic natural gas.…”

Phase-Transfer-Catalyzed Oxidations

“…Phase-transfer-catalyzed permanganate oxidizes coals to soluble and insoluble products which can be analyzed by physical techniques for use as a structural probe for various coals [76]. …”

Coal depolymerization using permanganate under optimal conditions

“…When used at a higher concentration of 0.25 mol/L at 80 o C, permanganate liberated around 25% of the coal carbon from lignite to organic acids and 15.9% to humic acids (Hayatsu et al, 1981). In addition to these studies, permanganate as an oxidant has been successfully used to remediate groundwater and soil at contaminated hazardous waste sites (Ighere et al, 2015;Urynowicz, 2008) and also for coal structure studies (Bone et al, 1930;Burke et al, 1990;Forsey et al, 2010;Haenel, 1992;Moore and Swanson, 1993;Novikova et al, 2010;Zhang, 2016). However, although permanganate is a promising oxidant in dissolving chemicals from coal, use of this chemical for producing value-added products from coal has not been investigated in detail.…”