Coal gasification, Reactor Modeling.
Underground Coal Gasification( with Prof. Anuradda Ganesh (Energy); Kartic C Khilar, and Sanjay M Mahajani )
The in-situ gasification of deep coal deposits has great potential for enhancing energy supply for the country. A systematic chemical engineering approach is being taken in order to understand the various complex phenomena in UCG. The focus is on the occurrence of multiple reactions, determination of appropriate kinetic equations, study of flow patterns, and modelling of coal cavity formation/growth.
Reduction of Automotive NOx
The catalytic converter is currently widely used for the control of pollutants forming in automobile engines. This multi-purpose device is useful in oxidation of hydrocarbons and carbon monoxide, and also the reduction of Nitrogen Oxides. However, its applicability to diesel, CNG, and lean-burn petrol engines is limited. The focus in our group is on quantification of the relevant catalyst reaction pathways, discrimination between various catalysts from among Platinum Group Metals, and improvements to ensure wider applicability.
Reduction of Large Reaction Mechanisms
Combustion of hydrocarbons is typically envisaged as a complex phenomenon involving several thousand elementary reactions and several hundred intermediate species. While such reaction mechanisms are easily incorporated in ideal or simplified reactor models, they are computationally too intensive for efficient use in Computational Fluid Dynamics (CFD) simulations. In situations where the transport aspects are critical, and the role of the reaction chemistry is less important, use of reduced reaction mechanisms in CFD codes is the common practice. The reduction, however, has to be performed in a coherent, mathematically robust manner. The focus in our group is on development of reduced reaction mechanisms for combustion of large hydrocarbons such as JP10 and n-decane, for use in CFD simulations of scramjet engines.