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Since the physical and chemical characteristics of biogas, some problems will occur in its applications in engine. The biogas engine and its performance parameters analysis is regarded as research object, the biogas engine model library was built based on the object-oriented language Modelica. The effect of compression ratio, ignition advance angle and the combustion duration on the performance of...
With the profoundation of study on biodiesel, it can be found that biodiesel and water may format micro-emulsion fuels only with the existence of ethanol, furthermore, more water and biodiesel can be micro-emulsified with certain surfactants and ethanol. To study the application of biodiesel-ethanol-water micro-emulsion fuels, the paper indicates the preparation of the micro-emulsion fuels, and their...
Up to now the direct use of crude bio-oil as transportation fuel has been an impossible goal due to the thermal instability and some other drawbacks of bio-oil. In this paper, we use a simple method to accomplish the goal. Bio-oil and bio-diesel are potential renewable and carbon-neutral alternative to fossil fuel. We mix bio-oil and bio-diesel to get the emulsion using octanol as the emulsifier....
By means of burning a fraction of comminuted biology-molding fuel and analyzing related parameter and burning characteristics via thermobalanc, the microcosmic burning mechanism of biology-molding fuel verifies Eigen values of curve, parameters of combustion dynamic, providing theoretical reference for high-efficient burning and reasonable application of biology-molding fuel, which consists of the...
Amid growing concerns about unstable oil supplies and the impact of fossil fuels on global warming, bio-fuels are receiving increased attention. Ethanol bio-fuel could play an important role in reducing fossil fuels consumption and greenhouse gas emissions when applying to the transport facilities. In this article a new approach ethanol steam reforming was introduced for the existing spark ignition...
The gasification technology is now considered to be in an advanced stage of development. Hence there is huge expectation from the user industry for its application. Gasification is a process that converts carbonaceous materials, such as coal, petroleum, or biomass, into carbon monoxide and hydrogen by reacting the raw material at high temperatures with a controlled amount of oxygen. The resulting...
A laboratory scale updraft fixed bed gasifier was designed to study the characteristics of gasification and incineration of organic solid wastes. Research had been carried out on the emission characteristics of SO2, NO and NO2 of solid wastes in the gasifier in different operation condition, the effects of reactor temperatures (650degC-790degC), gasification mediums (air and oxygen) and the flow rate...
Chemical-looping combustion (CLC) has been suggested as an energy efficient method for CO2 capture without extra energy cost for the separation of CO2. In CLC oxygen is transferred from the combustion air to fuel by means of an oxygen carrier. The fuel and the combustion air are never mixed, and the combustion products (CO2 and steam) are kept separate from the flue gas. After condensation of the...
The component, physical & chemical characteristics of biogas and the problems of engines running on it are introduced briefly in this paper. The two main steps that are diesel injection ignition and fast-burning system, which are used to solve the problems of the low burning velocity, serious back burning, high exhaust temperature and severe heat charge for biogas engines are expatiated. Then...
The experiment on smoldering gasification in woody biomass has been carried out with a horizontal packed bed. Gas chromatography is employed to analyze the concentration of CH4, H2, CO, CO2 and O2 in gas products of smoldering gasification. The affects of temperature, moisture concentration and air condition on the flammable compositions of gas products are discussed. It is concluded that gas products...
This paper analyzed chemical and physical properties of diesel fuel and biodiesel. The influence of B20, B50, B100 and 0# diesel fuel mixture on diesel engine performance has been studied in a HF495Q3 engine. Test results show that the driving force of the engine is weaker with the adding of methanol, miximum power, miximum torque reduced about 9.8%, 5.6%; For better evaluated engine economic, in...
Based on time-varying statistical data and emission factors, multiyear NMVOCs emission inventories from fossil fuel combustion, biofuel burning, and biomass open burning in China for 1980-2005 were presented by a bottom-up estimate. The contributions of fossil fuel, biofuel, and open burning are estimated as 35%, 50%, and 15%, respectively, in 2005. Spatial distribution of NMVOCs emission shows that...
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