Investigation on gas conversion efficiency and filtration behaviour of diesel oxidation catalysis system

ABSTRACT

The toxicity of automotive exhaust emissions can be reduced by pretreatment and post-treatment techniques out of which post-treatment techniques have proven to be more effective. A detailed study on the mechanism of reactions taking place inside the diesel oxidation catalysis (DOC) system is carried out in this paper. Experimental study has been carried out to determine the conversion efficiency of DOC system which is composed of cordierite substrate with a catalyst coating of platinum and palladium. Four DOC substrates with different catalyst loading have been used for experimentation and a comparative study has been conducted on the conversion efficiency of these substrates. Characterization of the DOC substrate is carried out using particle size analysis and atomic force microscopy techniques. Experimental analysis of the system is conducted in a multi-cylinder four stroke diesel engine with electrical dynamometer for loading. The results of experimental study showed that 400 cpsi ceramic DOC (35 g/ft³) has better conversion efficiency and performance among the DOC substrates considered in this work. Higher conversion efficiency is observed at full load condition which shows that the exhaust gas temperature plays a major role in the catalytic activity of DOC substrates.

KEYWORDS:

• Diesel oxidation catalysis (DOC)
• diesel engine
• exhaust emission
• conversion efficiency

Acknowledgments

The research work performed in this article is funded and supported by internal seed fund project grant by R&D department, UPES, Dehradun, India. The authors also thank the Department of Mechanical Engineering and Centre for Alternate Energy Research, UPES for their extended help and support.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the SEED Grant, R&D UPES, Dehradun, India [SEED].

Notes on contributors

Caneon Kurien

Caneon Kurien is working as a Doctoral Research Fellow in University of Petroleum and Energy Studies. He received a bachelor's degree in Mechanical Engineering from Calicut University and master's degree in Pipeline Engineering from University of Petroleum and Energy Studies. His current area of research is on the development of an intuitive emission control system and sustainable energy. He is interested in internal combustion engines, computational fluid dynamics, energy systems and fluid transportation.

Ajay Kumar Srivastava

Dr.Ajay Kumar Srivastava is working as Professor and Head of Mechanical Engineering Department in University of Petroleum and Energy Studies. He received a bachelor's degree in Mechanical Engineering from Visweraya Technological University and Master's degree in Design of Process machines and Ph.D degree in VARTM process modelling from Motilal Nehru National Institute of Technology, India. He is an active member of SAE (Society of Automotive Engineers) and ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) His current area of research is on the exhaust emission control of compression ignition engines and development of composite materials and composite manufacturing processes.