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Daliuta subbituminous coal (DL), loaded with Fe 2 (MoS 4 ) 3 bimetallic catalyst, was liquefied in a 50ml micro-autoclave with tetralin as solvent at 440 o C, initial hydrogen of 6.0MPa, soaking time of 30min in attempt to produce one to four ring aromatic chemicals. The catalytic effects of in situ impregnated Fe 2 (MoS 4 ) 3 in water solution...
A new non-evaporative coal dewatering method was presented, in which a bed of coal was contacted with a flowing non-polar solvent at less than 200 o C. Water in coal was released by thermal energy added and the released water was dissolved into solvent and was carried away from the coal bed. When the solvent was recovered at room temperature, most of water is separated from the solvent due...
Among various forms of coal ash and bed material purged from the bottom of pressurized fluidized bed combustion boiler, a kind of the fused agglomerate ash grain was analyzed by SEM, EDAX, and XRD. The agglomerate shell was found to consist of black matrix and white particles. The inner and outer surfaces of the shell appeared to consist of different compositions. Inner and outer surfaces showed ratios...
The non-catalytic and catalytic oxidations of CH 4 over Mo-V-Cr-Bi-Si oxide catalysts were investigated in a tubular reactor and the catalysts were characterized by XRD, XPS and TPR. Contents of Bi in the catalysts influenced the combination of Mo-V-Bi-O species and, consequently, influenced the TPR reduction temperature of the catalysts. The catalysts exhibited more selective production of...
The process and the mechanism of multi-stage hydropyrolysis (MHyPy) of coal were investigated by analyzing the products of different MHyPy processes in detail. The results showed that the suitable holding temperature was near the peak temperature (350-500 o C) at which more free radicals were produced rapidly, thus more oil was formed and the hydrogen utilization efficiency was increased....
Na 2 CO 3 can disperse onto the surface of γ-Al 2 O 3 and form a quite complete monolayer. The adsorption capacity of SO 2 on Na 2 CO 3 /γ-Al 2 O 3 increases with Na 2 CO 3 loading, and reaches a maximum at the dispersion threshold. When the loading is below the threshold, the adsorption is in company with oxidation...
Carbon nanotubes (CNTs) have been successfully produced from 10 typical Chinese caking-coals using an arc plasma technique. For comparison, one caking coal from New Zealand is also tested. The results show that all coals tested can be used to produce significant quantities of CNTs with fullerenes as by-products. The CNTs are examined using scanning electron microscope and high resolution transmission...
The characteristics of spin system in coal have been compared with and without addition of iodine by means of electron spin resonance spectroscopy. With the addition of iodine, the spectra obtained from low rank coals remain almost unchanged, while those from high rank coals consist of two distinct lines, one narrow and the other broad. The peak intensities of broad component are proportional to the...
The effects of calcium and iron impregnated on coal chars as catalysts on NO-char reaction have been investigated under various atmospheres in a quartz fixed bed reactor. Temperature programmed reaction and isothermal reaction were used to determine the catalytic activities of calcium and iron in NO-char reaction. The results showed that the higher the pretreatment temperatures are, the lower is the...
A method for the deconvolution of 13 C NMR spectra of coals has been developed by using coal-like model compounds and various lithotypes separated from Yallourn brown coal which is rich in various types of oxygen-functional groups. The spectrum of coal was resolved into 24 peaks which were classified into nine types of carbon-functional group. This analytical method can be applied to...
An industrial manganese-promoted ultrafine particle (UFP) iron catalyst for slurry phase Fischer-Tropsch synthesis was examined in a 1dm 3 stirred tank slurry reactor under various reaction conditions as a representative of industrial practice (533-573K, 1.5-2.5MPa, 1.0-2.5l (STP)/g-cath, H 2 /CO=0.65-2.0). The Fe-Mn UFP catalyst showed high CO conversion and gave high yields of C...
Effect of small amount of Pt, Pd and Ru promoters on the characteristics and performance of Co/SiO 2 catalyst, which was prepared from the mixture of cobalt nitrate and cobalt acetate, was investigated in the hydroformylation of 1-hexene. It was found that the addition of small amount of a noble metal to the supported cobalt catalyst led into great improvement of catalyst activity for hydroformylation...
Hydrogen exchange reaction of three Argonne coals (Illinois No. 6, Upper Freeport and Pocahontas #3) and Wandoan coal with tritiated gaseous hydrogen were performed at several temperatures. Hydrogen exchange reaction was performed in a flow reactor packed with 0.4g of coal and 0.05g of catalysts under the following conditions: pressure 15kg/cm 2 , temperature 200, 250, 300 o C, carrier...
A new process has been suggested for converting natural gas to ethylene by combining oxidative coupling of methane with ethane dehydrogenation to provide an efficient method for the utilization of thermicity and CO 2 . From their thermodynamics, it is clear that the exothermicity from CH 4 oxidative coupling reaction (ΔH 800^ o C =-174.3kJmol - ...
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