THE RESULT OF INVESTIGATION OF COAL FROM CHANDGANA TAL DEPOSIT

Proximate and ultimate analyses showed that Chandgana Tal coal has the following properties; Wa-13.29%, Ad-12.43%, Vdaf-44.98%, Qdaf-5914 kcal/kg, C-67.56%, H-5.79%, S-1.67%, N-1.18% and O-23.8%. Pyrolysis of coal was performed at 200-700оС using small quartz reactor. With increasing temperature of pyrolysis, the yield of hard residue decreased, while the yield of tar and pyrolytic water increased. The yield of coal tar was maximum at 700оС, and reached 4.8%. At this stage, coal was pyrolized in a bigger scale retort of laboratory. The tar was separated from water and analysed by FT-IR and organic composition. Thermolysis experiments were also performed in order to explore the possibility of obtaining liquid products under mild condition. The results show that 23.5% of liquid product can be obtained at 450оC with coal to tetralin ratio (1:1.8)

Thermal processing of Khoot coal and characterization of obtained solid and liquid products

On 21st January 2015, the abstract of this paper was replaced with the correct abstract.The coal of Khoot deposit have been investigated and determined the technical characteristics, elemental and petrographical maceral compositions. On the basis of proximate, ultimate, petrographic and IR analysis results have been confirmed that the Khoot coal is a sub-bituminous coal. The hard residue after pyrolysis have been activated by heated water steam and determined the iodine and methylene blue adsorption of initial coal and activated carbon samples from pyrolysis hard residue. The porosity structure of initial coal, activated carbon of pyrolysis hard residue and hard residue after thermolysis (thermal dissolution) have been determined by SEM analysis. The liquid tar product of thermolysis of Khoot coal was investigated by FTIR, 13C and 1H NMR spectrometric analysis. The results of thermolysis of Khoot coal in tetralin with constant mass ratio between coal and tetralin (1:1.8) at 450°C show that 60.8% of liquid product can be obtained after thermolysis of the coal organic mass.DOI: http://doi.dx.org/10.5564/mjc.v15i0.326 Mongolian Journal of Chemistry 15 (41), 2014, p66-7

CHARACTERIZATION OF COAL FROM BAYANTEEG DEPOSIT

The coal of Bayanteeg deposit was investigated and its technical characteristics, elemental and petrographical maceral compositions were determined. On the basis of proximate, ultimate, petrographic analyses results, it has been confirmed that the Bayanteeg coal is a middle-rank D mark subbituminous coal. The pyrolysis of Bayanteeg coal was studied by using a standard quarts retort (tube) at different heating temperatures and the yields of pyrolysis products such as hard residue, tar, pyrolytic water and gas were determined. The result of these experiments showed that the higher yield 14% of tar can be obtained at heating temperature 500°C.Also the thermal dissolution of Bayanteeg coal was investigated by using a standard stainless steel autoclave at different heating temperatures and the yields of pyrolysis poroducts such as hard residue, tar, pyrolytic water and gas were determined. The tetralin was used as hydrogen donor solvent with constant mass ratio between coal and tetralin (1:1.8). The results of these experiments showed that high yield of tar 48% can be obtained on thermal dissolution of the coal organic mass at 450°C. The solubility of purified pyrolysis tar of Bayanteeg coal in hexane, benzene and dichloromethane was investigated by using silica gel column and the chemical composition of each fraction was determined by using of GC/MS chromatograph system

Research on the thermal decomposition of Mongolian Baganuur lignite and Naryn sukhait bituminous coal

The technical characteristics, elemental composition of the organic and mineral matters, ash melting behaviors and carbonization and gasification reactivities of coals from Baganuur and Naryn sukhait deposits were investigated. The results of proximate and ultimate analysis confirmed that the coal from Baganuur deposit can be graded as a low rank lignite B2 mark coal and Naryn sukhait coal is a bituminous G mark one. The carbonization and gasification experiments were performed using TGA apparatus and fixed bed quartz reactor. The data obtained with two experimental reactors showed that Baganuur lignite had lower thermal stability and much higher CO2 gasification reactivity at 950°C as compared to those for Naryn sukhait bituminous coal.Mongolian Journal of Chemistry 16 (42), 2015, 22-2

Investigation on pyrolysis of some organic raw materials

We have been working on pyrolysis of some organic raw materials including different rank coals, oil shale, wood waste, animal bone, cedar shell, polypropylene waste, milk casein and characterization of obtained hard residue, tar and pyrolytic water and gas after pyrolysis. The technical characteristics of these organic raw materials have been determined and the thermal stability characteristics such as thermal stability indices (T5% and T25%) determined by using thermogravimetric analysis. The pyrolysis experiments were performed at different heating temperatures and the yields of hard residue, tar, pyrolysis water and gaseous products were determined and discussed. The main technical characteristics of hard residue of organic raw materials after pyrolysis have been determined and the adsorption ability of pyrolysis hard residue and its activated carbon of organic raw materials also determined. The pyrolysis tars of organic raw materials were distilled in air condition and determined the yields of obtained light, middle and heavy fractions and bitumen like residue with different boiling temperature. This is the first time to investigate the curing ability of pyrolysis tars of organic raw materials for epoxy resin and the results of these experiments showed that only tar of milk casein has the highest (95.0%), tar of animal bone has certain (18.70%) and tars of all other organic raw materials have no curing ability for epoxy resin