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Sulfur-containing compounds in oils are harmful to the ecosystem whose cost-effective removal is still a challenge. In this study, novel heterogeneous catalysts of cobalt supported on KIT-6 mesoporous silicas were prepared and evaluated for oxidative desulfurization (ODS) under ambient conditions using cyclohexanone peroxide (CYHPO) as the oxidant. The model oil was obtained via dissolving DBT in...
To achieve novel sorbent-catalysts with low cost and high activity for removing HCHO in flue gas, we prepared and investigated CuO-CeO2 supported on activated coke granules (CuCe/AC) for decomposition of gaseous formaldehyde (HCHO) from simulated coal combustion flue gas. The results indicated that Cu3Ce8/AC exhibited remarkable conversion performance and good stability for HCHO removal. The presence...
Considering self-heating and hazardous gaseous emission, the safety of wood pellets storage has become one of the important aspects for woody biomass utilization. In this study, the emissions of aldehydes/ketones were analyzed by high performance liquid chromatogram (HPLC). The properties of pellets stored in semi-closed tanks with different temperatures and relative humidity (RH) were also investigated...
Thermal and oxidative behavior of glycerol-in-diesel hybrid (GDH) fuel systems with different contents of glycerol and their corresponding pyrolysis and combustion kinetics were studied. The thermogravimetric (TG) analysis indicates that different fuel systems had similar TG curves, which means their thermal and oxidative degradation similarities. The different compositions of the fuel systems or...
A comprehensive study was conducted on the properties of chars which derived from hydrothermal carbonization (HTC) of sewage sludge (SS) while varying the operation parameters as reaction temperature 180–300°C, reaction time 30–480min. The properties of chars derived from municipal sewage sludge HTC were evaluated by Elemental analysis, FTIR spectra and thermogravimetric analysis. Elemental analysis...
The pyrolysis characteristics and kinetics of the blends produced from the mixture of torrefied camphorwood and caster bean cake (CAS) were determined by thermogravimetric analysis. Kissenger–Akahira–Sunose (KAS) and Coats–Redferm methods were applied for kinetic analysis. The results show that torrefaction can increase the maximum decomposition rate and smooth the pyrolysis reaction at 250–330°C...
The byproduct (bio-char) from liquefaction of rice husk with water, water/ethanol (V/V, 5:5), or ethanol as the solvent at 260–340°C was characterized in terms of its elemental composition, thermogravimetric characteristics, surface area and pore size distribution, morphology, and oxygen-containing functional group composition. The liquefaction bio-char produced with water (WBC) or water/ethanol (WEBC)...
In order to enhance the catalytic activity for elemental mercury (Hg0) oxidation without the aid of HCl, CeO2 was added into the support to modify V2O5–WO3/TiO2 catalysts. The performance of V2O5–WO3/TiO2–CeO2 (VWTiCe) catalysts on Hg0 oxidation as well as the catalytic mechanism was also studied. The catalysts were characterized by BET, XRD and XPS techniques. The results showed that the performance...
Microemulsion technology was found to be a promising fuel-upgrading process for glycerol. Biosurfactant rhamnolipid (RL) was successfully tested to obtain nano-scaled glycerol-in-diesel microemulsion (GDM) and glycerol/water-in-diesel microemulsion (G/WDM). These microemulsion fuels were stored at 4°C without phase separation for over six months. Fuel properties like high heating value (HHV), dynamic...
In this paper, the performance of catalytic oxidative desulfurization (ODS) were studied using catalyst W/D152 which was prepared by depositing tungsten on resin D152, a macroporous polyacrylic cationic resin. Dibenzothiophene (DBT) was selected as the target compound, and oil-soluble cyclohexanone peroxide (CYHPO) as an oxidant. The effect of different reaction parameters, including reaction temperature,...
Mercury emission from coal-fired power plants becomes a great environmental concern due to its high toxicity and volatility in particularly for elemental mercury. Activated carbon adsorption is considered to be a potential technology to control elemental mercury emission. In this work, a novel CeO 2 /AC (activated carbon impregnated with cerium dioxide) sorbent was studied with an attempt...
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