Due to the increased demand for global transportation needs, a long-range diesel engine is considered an important prime mover to fulfill the transportation demand. The major problem addressed by the diesel engines is it liberates harmful emissions and it also increases global warming. CO2 is considered an important greenhouse gas and it has to be controlled by diesel engines. In this research, extensive experimental work is done to identify a suitable solution to control CO2 emissions. For five different mole concentrations (0.1 to 0.5), three types of amino solutions (L-alanine, L-aspartic acid, and L-arginine) were prepared. By passing diesel exhaust through each solution, CO2 absorption is investigated. For CO2 absorption, an appropriate CO2 control system is built and tested. The tests were carried out in a diesel engine which is a naturally aspirated single-cylinder engine with a water-cooled system. It was possible to obtain an effective CO2 reduction of up to 90%, as well as a simultaneous reduction in HC and CO.

The present investigation focuses on the study of erosive slurry wear behaviour of plasmasprayed flyash-Al 2 O 3 composite coatings on the substrate of Al6061 alloy in slurry with 3.5% NaCl solution. The influence of various process parameters, such as different slurry concentration (10-30%), varying rotational speed (500-1500 rev min −1 ) and varied impinging particle sizes (210-425 µm), was compared by conventional weight loss method and Taguchi's L 27 experimental design method. It was observed that the composite coatings on Al6061 alloy showed a highest resistance to erosion. The significance of the parameters was determined by using analysis of variance technique and it was found that the factors slurry concentration and slurry speed had great influence on erosive slurry wear of substrate with and without plasma spray coatings. Regression analysis was used to develop mathematical model to predict the slurry erosive wear. Predicted values are in good agreement with experimental values.

This chapter discuss extensively on various thermal spray coatings for erosion-corrosion protection of industrial components, feedstock materials and their characteristics. Various coating removal mechanisms in thermal spray coatings have been presented. Influence of process variables, test parameters, coating thickness and working temperature on performance of thermal spray coatings for erosion-corrosion have been discussed comprehensively. Further, the concern of erodent's suspended in fluids, disintegrating and resulting in significant wear of the surfaces due to erosion-corrosion phenomenon also reported here.

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High Pressure Processing (HPP) is an emerging process technique which makes food safer and extends its shelf life. Unlike most conventional heat treatments, it is a non-thermal preservation and pasteurization technique that causes little or no change in the organoleptic and nutritional attributes of the product being processed. High-Pressure Processing (HPP) using 100 MPa to >1,000 MPa for short period and has been shown to enhance safety and extending shelf-life, free from additives with minimal influence on the sensory, physical and nutritional properties of the food and minimizes the microorganisms to the safe level. It meets consumer demand for freshness without the negativity often associated with other methods such as irradiation. This paper reviews the literature on high pressure application in food industry, principles of High-Pressure Processing, types of HPP, advantages and limitations of HPP.