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This work illustrates ultrasound assisted synthesis of biodiesel from waste cooking oil using calcium diglyceroxide as a heterogeneous base catalyst. The effect of different variables such as methanol to oil molar ratio, catalyst loading, reaction temperature, ultrasonic power and duty cycle on the progress of the reaction was studied. Under the optimal reaction conditions viz. methanol to oil molar...
Integration of solvent deasphalting and asphaltenes gasification has been reported as a convenient alternative to coker based upgrading of bitumen, derived from oil sands. However, very limited work has been carried out on pyrolysis and gasification of asphaltenes at entrained flow conditions. The present study aims at addressing this gap, and provides a better understanding of the major intermediate...
A mechanistic approach has been used for assessing the ash deposition tendency and has been used for predicting the ash deposition behavior of Australian bituminous coals in a pilot-scale test furnace. The detailed analysis of mineral matter in coal determined by QemSCAN analytical technique was incorporated into an ash formation model to estimate the character of ash particles. The detailed chemical...
The knowledge of biomass char gasification kinetics has considerable importance in the design of advanced biomass gasifiers, some of which operate at high pressure. The char gasification kinetics themselves are influenced by char structure. In this study, the effects of pyrolysis pressure and heating rate on the char structure were investigated using scanning electron microscopy (SEM) analysis, digital...
This study investigated the deposit structure in terms of the bulk porosity for Australian bituminous coals and blends that were fired in a pilot-scale test furnace. The first part of this study estimated all the deposits bulk porosity using two indirect techniques: a density measurement technique and by scanning electron microscopy (SEM). The results showed a significant difference between the two...
The physical and chemical structure as well as gasification reactivities of chars generated from several biomass species (i.e. pinus radiata, eucalyptus maculata and sugar cane bagasse) were studied to gain insight into the role of heating rate and pressure on the gasification characteristics of biomass chars. Char samples were generated in a suite of reactors including a wire mesh reactor, a tubular...
In this study, deposition experiments with well characterized samples of Australian black coals and blends were conducted in a laminar drop-tube furnace to assess the blends behavior and their potential to form ash deposits. Comparison of the results between the blends and single coals shows that the blends behavior was not additive in nature. Some blends developed a thicker ash deposit layer with...
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