Abstract
The combustion of bituminous coal, bio-oil, and their slurry mixtures were performed under air atmosphere using Thermogravimetric Analyzer (TGA). All samples were run from room temperature to 110°C and held for 10 minutes before the temperature was ramped to 1100°C and held again for 10 minutes at 1100°C at the heating rate of 10°C/min and gas flow rate of 50mL/min. Kinetic evaluation was conducted using a simple Arrhenius-type kinetic model with first-order decomposition reaction. Apparent activation energy, Ea, and pre-exponential factor, A, were calculated from the modelling equation. Results reveal that the reactivity of CBS fuel is higher than a single coal fuel to which the addition of bio-oil helps to increase the combustion performance of the blends. The optimum fuel ratio appears at 50:50 ratio with equal contribution of coal and bio-oil properties that contribute to the increase in volatile matter causing maximum combustion rate achievable at much lower temperature compared to single coal fuel.
Highlights
World necessity lies on water and energy supplies
Even though bio-oil is more reactive than Clermont coal as it is ignited due to its volatile matter content, its lower values of energy content is overcome by adding into coal to enhance its combustibility
The information on kinetic parameters was determined by differential method using Arrhenius expression to evaluate the combustion performance where main weight loss occurs at the stage of oxidation
Summary
World necessity lies on water and energy supplies. With continuous surge on populations and economies, the global energy demand is foreseen to climb up by more than a third by 2035, in which, 60% of the increment is demanded by China, India and Middle Eastern countries. Fossil fuel by far, has been the ultimate source of world energy production and coal is one of them. World is fixed upon a rapid transition into the utilization of renewable energy sources such as the engaging biomass. Co-combustion of coal-biomass in the existing coal-fired power plants has been proposed to quell coal consumption. This mixed generation has become one of the fastest and low-cost alternative solution in recent years with proven study in reducing NOx and fossil CO2 emissions [1]. Biomass conversion into bio-oil is being proposed to develop an energy mix technology known as Coal-biooil slurry (CBS) fuel
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