A high temperature combustion method was used to analyze the 14C and 3H activities in graphite and the dose assessment was carried out to determine the clearance in the conservative way. By this method, the 3H and 14C were simultaneously trapped in the nitric acid and carbosorb, respectively. Accordingly, the sample preparation time for the measurement was reduced to the half. The combustion te...

The synthesis of singleand double-wall carbon nanotubes by gas flow-modified, catalyst-supported chemical vapor deposition (CCVD) is reported. We have investigated the gas flow condition dependence on the synthesis of carbon nanotubes (CNTs) by placing blocks in the CCVD reactor. Carbon nanotubes having large diameters are preferentially grown under turbulent flow conditions. This indicates tha...

Automobile component malfunctions are typical causes of many on-road accidents. Proper fault diagnosis conducted on automobile engines helps to prevent accidents by providing early warnings. The instantaneous angular speed (IAS) method, which uses low-cost sensors, has proved useful in diagnosing combustion-related faults in engines. In this paper, we evaluated various types of faults that occu...

The mixture formation prior to the ignition process plays as a key element in the diesel combustion. Parametric studies of mixture formation and ignition process in various injection parameter has received considerable attention in potential for reducing emissions. Purpose of this study is to clarify the effects of injection pressure on mixture formation and ignition especially during ignition ...

The increasing demand for socially and environmentally sustainable development requires appropriate use of energy resources, particularly in the transportation of people and goods. The main source of energy for propulsion is based on the use of fuels, mainly of fossil origin but increasingly produced from renewable sources. Therefore, combustion processes play a key role in the efficiency of en...

This paper illustrates the utility of developing compu­ ter models to predict and evaluate performance of com­ plex systems, in this case a dual combustion chamber incinerator of the type normally operated with starved air in the primary chamber, and equipped with a heat recov­ ery boiler. Once the model has been written, it can be used for construction of performance curves and examina­ tion o...

Nanocrystalline ZrO2 with particle size of about 38 nm was directly synthesized by sol-gel auto-combustion method. The overall process involved three steps: formation of homogeneous sol at 50-55°C; formation of dried gel at 110°C, and combustion of the dried gel at 400°C. Experiments revealed that ZrO2 dried gel derived from glycine (Fuel) and nitrate sol exhibited self pr...