Work is focused to the study of unburned carbon in ash from coal (and wastes) combustion in 8 combustion tests at 3 fluidised-bed power station, at co-combustion of coal and wastes (also at fluidized bed) and at bench-scale unit simulating coal combustion in small domestic furnaces. The attention is paid to unburned carbon contents in bottom ashes and fly ashes at these 8 combustion tests and t...

This paper describes active control of an aftertreatment system for a spark ignition engine equipped with a three-way catalyst and preand post-catalyst oxygen sensors. The control objective is to maximize the simultaneous conversion efficiencies of oxides of nitrogen and unburned hydrocarbons. Linear exhaust gas oxygen sensors are used to measure preand post-catalyst air-fuel ratio. A series co...

Adsorption behavior of unburned carbons from fly ash has been investigated in this study. Batch tests and column test were carried out for several unburned carbon samples from various ash sources and processing schemes. Adsorption isotherms have been obtained from these tests. Results show that the unburned carbons have equal or better adsorption capacity for elemental mercury comparing with so...

The effects of unleaded gasoline and unleaded gasoline–ethanol blends on engine performance and pollutant emissions were investigated experimentally in a single cylinder, four-stroke spark-ignition engine with variable engine speeds (2600–3500 rpm). Four different blends on a volume basis were applied. These are E0 (0% ethanol + 100% unleaded gasoline), E3 (3% ethanol + 97% unleaded gasoline), ...

Coal combustion by-products (CCPs) contains a certain amount of unburned carbon partcles (~4% to ~30%) without utility way. For utility of unburned carbon, this study tried to make unburned carbon be adsorbent in wastewater treatment. A activation treatment with high temperature had proceed on unburned carbon sample, and effects on adsorptive capability were appeared with results such as the ad...

nowadays, increased attention has been focused on internal combustion engine fuels. regarding environmental effects of internal combustion engines particularly as sources of pollution and depletion of fossil fuels, compressed natural gas has been introduced as an alternative to gasoline and diesel fuels in many applications. a high research octane number which allows combustion at higher compre...

Nowadays, increased attention has been focused on internal combustion engine fuels. Regarding environmental effects of internal combustion engines particularly as sources of pollution and depletion of fossil fuels, compressed natural gas has been introduced as an alternative to gasoline and diesel fuels in many applications. A high research octane number which allows combustion at higher co...

The behavior of a laboratory-scale pulsed combustor is shown to undergo a global bifurcation as the equivalence ratio of the propane-air mixture is reduced toward the lean flammability limit. At near-stoichiometric and moderately lean conditions, the acoustically driven combustion oscillations exhibit small, stochastic cycle-tocycle variations. At very lean conditions, the available fuel invent...