Beneficiation of Himmetoglu and Beypazari oil shales by flotation and their thermal characterization as an energy source

Altun, Naci Emre
Processing of Bolu-Himmetoglu (Type I Kerogen) and Ankara-Beypazari (Type II Kerogen) oil shales by flotation techniques were investigated for achieving clean solid fuel substitutes. Materials characterization was done through mineralogical, XRD and FTIR analyses. Flotation responses of the samples were tested with non-ionizing and ionizing collectors of cationic and anionic types. The effects of the collector dosage and pulp pH on cleaning were determined. Other important flotation parameters, conditioning time, flotation time, pulp density, particle size and frother dosage were encountered using a statistical approach, through a full two level factorial experimental design. An advanced flotation procedure, assisted by ultrasonic application, was developed for further improvement in flotation performance. The effects of cleaning on thermal characterstics and combustion kinetics were evaluated with Differential Scanning Calorimetry and ASTM methods while the changes in the emission profiles were assessed using Effluent Gas Analysis. Himmetoglu sample was characterized as a carbonate and organic rich humic oil shale with XRD and FTIR analyses while Beypazari oil shale involved significant carbonate and clay minerals and exhibited a fulvic character with a poor organics content. Reverse flotation with amine acetates provided the most effective means of cleaning with Himmetoglu oil shale. Ash was decreased from 34.76 % to 23.52 % with a combustible recovery of 83.57 % using 800 g/ton Flotigam CA at natural pH and the calorific value increased from 4312 kcal/kg to 5010 kcal/kg. Direct flotation with amines was most effective for Beypazari oil shale cleaning. Using Armoflote 17, ash was reduced from 69.88 % to 53.10 % with 58.64 % combustible recovery using 800 g/ton Armoflote 17 at natural pulp pH and the calorific value of the sample increased from 876 kcal/kg to 2046


Ternary nanocomposites of low density, high density and linear low density polyethylenes with the compatibilizers E-MA-GMA and E-BA-MAh
Işık Coşkunses, Fatma; Yılmazer, Ülkü; Department of Chemical Engineering (2011)
The effects of polyethylene, (PE), type, compatibilizer type and organoclay type on the morphology, rheological, thermal, and mechanical properties of ternary low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE), matrix nanocomposites were investigated in this study. Ethylene – Methyl acrylate – Glycidyl methacrylate terpolymer (E-MAGMA) and Ethylene – Butyl acrylate- Maleic anhydrate terpolymer (E-BA-MAH) were used as the compatibilizers. The organo...
Beneficiation of Himmetoglu oil shale by flotation as a solid fuel substitute. Part 1. Materials characteristics and flotation behavior
Altun, Naci Emre; Hwang, JY; Bagci, AS (2006-01-01)
In this study, the processing of Himmetoglu oil shale from Bolu, Turkey, by flotation techniques was investigated for the possibility of achieving a clean solid-fuel substitute. The surface characteristics and mineral content of Himmetoglu oil shale were determined using mineralogical, XRD, and FIR analysis. The flotation response of the sample was tested with several nonionizing collectors and a variety of ionizing collectors belonging to both cationic and anionic groups. The effects of collector dosage an...
Investigation of the pre-concentration possibility of scandium ores
Altınsel, Yiğit; Altun, Naci Emre; Topkaya, Yavuz Ali; Department of Mining Engineering (2018)
This study was aimed at investigating the possibility of obtaining a scandium (Sc) pre-concentrate from Eskişehir-Mihalıççık scandium bearing clayey ore through mineral processing methods namely attrition scrubbing, enhanced gravity separation by using falcon concentrator, magnetic separation and flotation concentration. In this context, the study began with the characterization of the run-of-mine Eskişehir-Mihalıççık scandium ore by performing mineralogical, XRD and chemical analyses. Mineralogical analysi...
Beneficiation of Himmetoglu oil shale by flotation as a solid fuel substitute. Part 2. Process optimization by a statistical approach
Altun, Naci Emre; Hwang, HY; Bagci, AS (American Chemical Society (ACS), 2006-01-01)
The effects of the important flotation parameters on the cleaning process of the Himmetoglu oil shale from Turkey were investigated. The individual and multiple interaction effects of conditioning time, flotation time, pulp density, particle size, and frother dosage were determined using statistical analysis and factorial design of experiments. The influence of these parameters on the cleaning performance were evaluated in terms of ash yield, calorific value, and combustible recovery of the concentrates. XR...
Thermal characteristics of crude oils treated with rheology modifiers
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Thermal characteristics of eight crude oils and their treatment with additives were studied by differential scanning calorimetry (DSC), thermomicroscopy, viscometer and pour point tester. Different additives were found as more effective for different type of crude oils depending on the wax content. Crude oils showed a reduced pour point after treatment with additives. Effects of different additives were also discussed by analysing the DSC curves and thermomicroscopy result.
Citation Formats
N. E. Altun, “Beneficiation of Himmetoglu and Beypazari oil shales by flotation and their thermal characterization as an energy source,” Ph.D. - Doctoral Program, Middle East Technical University, 2006.