The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The swelling and sorption experiments were carried out simultaneously for two block coal samples under CO2 and CH4 pressure (up to 16MPa) at three temperatures (25, 45 and 65°C). The absolute sorption isotherms present type-II pattern and can be described by a modified BET model. The swelling isotherms present L-type pattern and can be described by a modified Langmuir model. The relationship between...
The pyrolysis of 14 coals with carbon contents (C%) of 67.5–94.9% are studied in the presence of 9,10-dihydrophenanthrene (DHP) at 440°C. The amounts of stable radicals in the coals and that generated in the pyrolysis are quantified by electron spin resonance (ESR). The amounts of active radicals generated in the pyrolysis are quantified by the amounts of hydrogen donated by DHP. The changes in quantity...
A process was proposed for upgrading heavy oil using non-thermal plasma technology in a conventional thermal cracking system under atmospheric pressure. Results from a comparison of the reactivity of a N 2 , H 2 and CH 4 plasma showed that the plasma can increase the trap oil yield significantly. The trap oil yield increased by ∼9% when the N 2 plasma was applied and...
The aim of this study is to understand details about the sample size influence on the CH 4 and CO 2 sorption behaviors of coals. Two anthracites (YQ and QS) were selected, ground and sieved. Four size fractions (from powder size −0.354mm to the lump size 4–10mm) were tested. The manometric method was used to determine the CH 4 and CO 2 sorption isotherms and kinetics...
The performance of four coal liquefaction residues (CLRs) in modification of petroleum paving asphalts were investigated. The 40–55 penetration grade modified asphalts were made. ASTM D5710-95 specifications were used to evaluate the modified asphalts. The influence of chemical composition and preparation methods were studied. The results indicate that the performance of CLR mainly depends on the...
Flue gas SO 2 removal at 200°C over Mo and Co doped V 2 O 5 /AC catalyst-sorbents and regeneration of the used catalyst-sorbents in H 2 at 380°C in the same reactor are studied in this paper. Compared with V 2 O 5 /AC, the catalyst-sorbents containing Co show higher SO 2 uptake while the one containing Mo shows a slightly lower SO 2 uptake...
Release behavior and chemical form distribution of As, Pb, Cr, Cd and Mn in Datong coal during pyrolysis was studied in a simulated drop-tube reactor at a heating rate of about 1000 o C/s, including effects of temperature (300-1000 o C), atmosphere (N 2 and H 2 ), and holding time (0.3-10 min). Results show that the bleeding ratios of As, Pb, Cr, Cd and Mn increase...
The properties of residues from thermal or catalytic coal hydroliquefaction experiments were characterised by the ultimate, proximate analyses. The relations between the properties of the residues and the liquefaction reaction conditions, such as temperature, time, catalyst, H-donor solvent and atmosphere were investigated. Variations in H/C ratio and organic volatile matter (OVM) content of the residues...
Sulfur released from five Chinese coals and an USA coal in hydrogen was correlated with the catalytic activity of an impregnated ferrous sulfate for hydrogenation of the coals. The hydrogenation was carried out at a high or ambient pressure. Sulfur released from the coals into the gas phase at the ambient pressure was monitored online with a flame photometric detector. The data indicate that the catalytic...
Activities of ferrous sulfate based catalysts impregnated on two Chinese coals were studied in coal liquefaction, and compared with an impregnated iron sulfide catalyst. Chemical forms and particle size distribution of the impregnated ferrous sulfate based catalysts were determined using EXAFS, XRD and SAXS techniques. The impregnated ferrous sulfate shows significant activity in the liquefaction...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.