Publicaties

In this work, the catalytic activities of several single metallic oxides were studied for the treatment of propylene, a component in motorcycles' exhaust gases, under oxygen deficient conditions. Amongst them, CeO2 is one of the materials that exhibit the highest activity for the oxidation of C3H6. Therefore, several mixtures of CeO2 with other oxides (SnO2, ZrO2, Co3O4) were tested to investigate the changes in catalytic activity (both ...

Cordierite is often used as substrate for three way catalysts for the treatment of automobile exhaust gases, mainly because of its high stability. In this paper, different synthesis methods of cordierite are systematically investigated with the aim to improve functionalities and surface properties. Amongst them, the conventional sintering method from kaolin was paid attention to, due to economic reasons and the high yield of obtained cordierite ...

Small stationary diesel engines, like in generator sets, have limited emission control measures and are therefore responsible for 44% of the particulate matter (PM) emissions in the United States. The diesel exhaust composition depends on operating conditions of the combustion engine. Furthermore, the measurements are influenced by the used sampling method. This study examines the effect of engine loading and exhaust gas dilution on the ...

Internal combustion engines are important sources of nitrogen oxides, carbon monoxide, unburned hydrocarbons and particulate matter in the troposphere. Environmental concern is leading to ever more stringent emission legislation and innovation in catalytic combustion aftertreatment systems to reduce tailpipe emissions. Modern fuel efficient lean burn gasoline and diesel engines produce oxygen rich exhaust gases. This makes the reduction of ...

Micro Gas Turbines (mGTs) have arisen as a promising
technology for Combined Heat and Power (CHP) thanks to their
overall energy efficiencies of 80% (30% electrical + 50% thermal)
and the advantages they offer with respect to internal combustion
engines. The main limitation of mGTs lies in their rather
low electrical efficiency: whenever there is no heat demand, the
exhaust gases are directly blown off and the ...

Exhaust gas recirculation (EGR) is an effective way to reduce NOx-emissions and increase the efficiency of hydrogen fueled internal combustion engines. Knowledge of the exact amount of EGR is crucial to understand the effects of EGR. As the exhaust gas flow is pulsating and chemically aggressive, the flow rate is typically not measured directly and has to be derived from other quantities. For hydrocarbon fuels, the EGR rate is generally ...

Despite appearing as a promising technology for distributed generation, micro Gas Turbines (mGTs) have not yet managed to penetrate the small-scale Combined Heat and Power (CHP) market. The energy effi- ciency of mGTs amounts to 80% whenever both heat and electricity are required. However, when the heat demand is low, the hot exhaust gases have to be directly blown off and the electrical efficiency of the unit (~ 30%) is not high enough to ...