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Shenshan sub-bituminous coal has been extracted with water at 200°C and 2 MPa. The resulting soluble mixture was separated into a deposit and a water-soluble fraction. The gas chromatography/mass spectrometry detectable species in both the deposit and the water-soluble fraction can be classified into linear molecules and cyclic molecules using the scaffold tree approach. The linear molecules consist of alkanes, acids, alkenes, alkanols, esters, ketones, aldehydes, ethers, nitrogen-containing organic compounds, and sulfur-containing organic compounds. The chemical structures of the cyclic molecules are more complicated and provide insight into the carbon skeleton structures and bridging linkages of the soluble molecules. [ABSTRACT FROM PUBLISHER]

The electrodeposition of nano-iron films from Fe2O3 precursor in an ionic liquid composed of 33·3 mol-% choline chloride (ChCl) and 66·7 mol-% ethylene glycol (EG) has been investigated. The electrodeposition process was carried out at 1·5-1·9 V and 60-120°C for 3 hours. The influences of experimental parameters on the electrodeposition process and the morphology of the deposited nano-iron films were studied. The results show that compact and uniform nano-iron (particle size is approximately 100-200 nm) films can be electrodeposited in the Fe2O3-saturated ChCl-EG ionic liquid at 1·8-1·9 V and 60-120°C. The electrodeposition temperature and applied potential have significant influences on the characteristics of the deposited nano-iron films and the electrodeposition process. It is suggested that the controllable electrodeposition process can be used to prepare nano-iron films with various particle sizes from Fe2O3 in CHCl-EG eutectic melt. [ABSTRACT FROM AUTHOR]