Rich burn industrial natural gas engines offer best in class post catalyst emissions by using a non-selective reduction aftertreatment technology. However, they operate with reduced power density when compared to lean engines. Dedicated exhaust recirculation (EGR) offers possible pathway for rich use technology without sacrificing density. In order achieve emissions, the precious metals and was...

Stable ultra-lean combustion is an effective way for natural gas engines to reduce NOx emissions, but it also has higher requirements ignition stability. The passive pre-chamber can effectively increase the energy and extend lean-burn limit of engines. However, scavenging capacity limits its performance under low engine load. In this paper, several pre-chambers are designed, CFD simulation carr...

Passive SCR systems, which employ both a three-way catalyst and catalyst, are effective for the reduction of nitrogen oxide (NOx) emissions from lean burn gasoline engines. However, questions remain regarding effect formulations on their performance in these systems. Here, Pd/CeOx/Al2O3 catalysts with variable CeOx loading were synthesized, characterized, evaluated to determine effects performa...

BACKGROUND: Environmental pollution causes a number of irreversible consequences, including those associated with climate warming, acid precipitation, deterioration climatic conditions and others. The problem reducing harmful emissions diesel engines containing in exhaust gases is currently relevant, as the implementation EURO 4/5/6 standards becoming increasingly difficult for both new automot...

When investigating the sources of particulate matter (PM) and its reduction methods, it is important to clarify composition. In this study, PM emitted from a lean burn gas engine with pre-chamber spark plug ignition system was analyzed by quantifying emission factors components, namely Elemental Carbon (EC), Organic (OC), sulfate nitrate, as well “the other components” . These were compared pre...

If your body were a train, what would give it the power to move? The food you eat, which is burned by train’s engine. Do know how many engines has? Thousands of millions! They are called mitochondria. Mitochondria tiny structures contained within cells that burn food, providing energy. each mitochondrion due its own gearwheel: circular mitochondrial DNA. There gears in mitochondrion. Together, ...

Using n-butanol as an alternative fuel can effectively alleviate the increasingly prominent problems of fossil resource depletion and environmental pollution. Combined injection technology improve engine combustion emission characteristics while applying combined to engines has not been studied yet. Therefore, this study adopted butanol port plus direct mode. The test bench performance under di...

this study was conducted to determine the causes and outcomes of burn in patients referred to shahid mohammadi hospital in bandar abbass, southern iran, in which 212 burned patients were assessed from march 2007 to march 2008 .mean age of patients was 22.14 yr. heat contact was the main cause of burn with 92.5%. 49.1% of total burns occurred among less than 20 yr old people. mortality rate was ...

Opposed rotary piston engines are characterized by high power density, which makes them as an ideal source for hybrid vehicles and range extended electric vehicles. Hydrogen applications can fully exhibit the merits of opposed engines, achieve zero carbon dioxide emissions; however, seriously worsen nitrogen oxides emissions. In this investigation, lean-burn was adopted to low emissions using a...