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The potential for in-cylinder thermochemical fuel reforming (TFR) to improve engine performance has been well studied. Meanwhile, achievable TFR gas can ensure that an engine coupled with in-cylinder TFR can run at a comparatively high compression ratio (CR), which might facilitate the in-cylinder TFR reforming process and then improve engine performance. This study focuses on performance optimization...
Co3O4 nanomaterials were synthesized by hydrothermal method and were applied for low temperature CO oxidation and methane combustion. The addition of ethylene glycol and its concentration significantly influenced the size and shape of the Co3O4 oxides. Nanosheets of Co3O4 were synthesized in ethylene glycol solution and nanospheres were formed in water. The activity of oxygen species in the nanosheets...
This paper mainly studied charging and electric field characteristics of different proportions of biomass/coal co-combustion ashes (co-ash) in a self-designed high-voltage electrostatic field, including an evaluation of charging, volt-ampere and plate current density distribution characteristics of co-ash. In addition, the mechanisms that influenced charging and electric field characteristics were...
A novel Ag/graphene adsorbent was synthesized for the Hg(II) removal from waste water. The Ag/graphene was characterized by Fourier Transformation Infrared Spectrum (FT-IR), X-ray Diffraction (XRD), Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) devices. The results showed that graphene acted as a good support for Ag particles on its huge surface. The removal efficiency...
This study aims to clarify the effects of inherent inorganic sodium salts present in Zhundong coal on the morphology, element composition, structures, and reactivities of chars from fast pyrolysis. The concentration of the main anions present in the raw coal determined by ion chromatography indicates that Na could exist in the forms of NaCl, Na2SO4, NaNO3, CH3COONa (NaAc), and NaHCO3, which were then...
CNT supported Cu based catalysts were prepared for the selective conversion of biomass-derived furfural to cyclopentanone in aqueous solution. The promotion effect was investigated with the addition of Co, Mo, Zn and Ni in Cu/CNT catalyst. The product distribution was greatly affected by the metal composition. Among those catalysts, CuZn/CNT catalyst exhibited better selectivity toward cyclopentanone...
A series of Ce modified TiO2 supported Co-Mn catalysts (CoxMn5/TiCey) prepared by sol-gel method and impregnation method were evaluated for simultaneous catalytic oxidation of Hg0 and NO in the simulated flue gas. Results showed that the catalysts exhibited good capacity of simultaneous catalytic oxidation of Hg0 (around 70%) and NO (around 40%) at 300°C using a simulated flue gas (Hg0, NO, SO2, O...
Coal permeability has been identified as one of the key factors affecting coalbed methane (CBM) extraction. CBM drainage and hydraulic fracturing usually lead to coal fines output. Some of these coal fines passed through wellbore discharged of coal bed, and some of them were compacted in fractures during the closing of fractures (or cleats) under the confining pressure. The pore distribution and seepage...
An experimental and theoretical investigation is conducted on the combustion of pulverized coal particle streams in either conventional or oxy-fuel conditions. The laboratory setup consisted of a Hencken flat-flame burner operated at the same temperatures of 1200, 1500 and 1800K in N2 and CO2 environments. The visible light detection technique and the calibrated three-color pyrometry are separately...
We report results of a computational study of oxy-fuel spray jet flames. An experimental database on flames of ethanol burning in a coflow of a O2–CO2 mixture, created at CORIA (Rouen, France), is used for model validation (Cléon et al., 2015). Depending on the coflow composition and velocity the flames in these experiments start at nozzle (type A), just above the tip of the liquid sheet (type B)...
This study reports occurrence forms of key ash-forming elements in a defatted microalga, and for comparison, its corresponding raw microalga. Freeze-dried powders of a marine microalga (Nannochloropsis oceanica) were sieved to a size fraction of <75μm and used as raw microalga. The raw microalga was then extracted with hexane to remove crude lipids and prepare a defatted microalga. The raw and...
V2O5-MoO3-TiO2 (V-Mo-Ti) is often used as a selective catalytic reduction catalyst for NOx from coal-fired flue gas. The performance of a V-Mo-Ti catalyst for the oxidation of elemental mercury (Hg0) was investigated. It was found that Mo was resistant toward sulfur dioxide and can enhance the Hg0 adsorption capacity. Ag was employed to enhance the Hg0 oxidation reaction and can enlarge reaction temperature...
Thermal dissolution (TD) of coal and hydro-liquefaction of the thermal dissolution soluble fraction (TDSF) with a high activity catalyst is one of effective high efficient hydro-liquefaction of coal techniques. In this study, a Chinese Shenfu (SF) sub-bituminous coal was thermally dissolved, and the TDSF obtained was further hydro-liquefied with Ni–Mo-S/Al2O3 catalyst. Based on the hydro-liquefaction...
Pretreatment is very important for improvement of the biogas production from biomass in anaerobic digestion (AD) process, especially for lignocellulosic substrates. Hydrogen peroxide pretreatment (HPP) was used to enhance the AD of Miscanthus floridulus. Results showed that the maximum methane yield was produced at 0.8% H2O2 concentration at neutral pH, which was 278.7mL/g VS (volatile solid) and...
The application of dieseline fuel (blends of diesel and gasoline) into compression ignition engines has been intensively investigated in recent years due to its good combustion performance and low smoke emissions. In this study, the main objective was to investigate the spray characteristics of dieseline fuel. Macroscopic spray characteristics in terms of spray morphology and penetration were investigated...
This article presents an overview on carbon chemical structure transformation to understand kerogen thermal decomposition based on the chemical structure of kerogen. Formation of kerogen is highlighted to distinguish the typical types of kerogen containing in oil shale and coal. The oil production potential for oil shale and coal is found to little correlate with their organic amounts but to depend...
In this study, the spray characteristics of a five-hole gasoline direct injector were investigated in a constant volume vessel. The absolute ambient pressure ranged from 0.5 to 10.0bar, and the fuel temperatures were 20°C and 80°C. High-speed imaging and phase Doppler measurement technique were utilized to investigate the spray morphology and the droplet dynamics, respectively. Spray collapses were...
A good consistence between the grand canonical Monte Carlo (GCMC) simulation results and the adsorption experimental measurements is an important precondition to reveal the shale gas adsorption mechanisms by the GCMC method. To better link the simulations and the experiments, we investigated the expression of the excess adsorption amount and the reasonability of selecting the critical parameters by...
High-energy and cost-intensive cell disruption processes represent one of the major techno-economic bottlenecks in the microalgae-based bio-refineries. Therefore, a feasible disruption method is required to ensure low energy input and operating cost, as well as high target-product (e.g., lipid) recovery. In this study, several different pre-treatment strategies for the disruption of Chlorella vulgaris...
In this study, the concept of in-cylinder thermochemical fuel reforming (TFR), which involves running one cylinder rich of stoichiometric and routing its entire exhaust back into the intake manifold, were examined on a four-cylinder spark ignition natural gas (NG) engine. Extra natural gas fuel (NG enrichment) was port injected into cylinder #4 (TFR cylinder) to realize its rich running. Results indicated...
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