Black Liquor addition to various rank coals by physical mixing
Description
The dataset determines the synergetic effect of the physical mixing of coal with variable amounts of black liquor, an industrial by-product of pulp production. The blend composition and dispersion were with sample composition data from Energy Dispersive X-Ray Fluorescence (ED-XRF) and adjusted for alkali and alkaline metal composition within the literature-reported catalytic range of 1-9%wt. Three bituminous coal samples with varying reactivity and ash content were chosen to assess the influence of different coal components, such as the petrographic composition of the coal or mineral components, on the catalytic performance of the samples. Therefore, 12 of the resulting samples with different amounts of black liquor (5-20% by weight) were gasified in steam at elevated pressure and process temperatures in the range of 800-1000°C with online measurement of produced syngas. The data on syngas evolution allowed for the visualization of the catalytic process with the gas formation rate curves of the main components of the syngas such as hydrogen, carbon monoxide, carbon dioxide and methane and the catalytic performance was evaluated with the calculation of specific parameters such as the formation rates and yields of syngas components and carbon conversion at various temperatures. Finally, the energy of activation and other kinetic parameters of the processes were calculated using the Isoconversional Model, Random Pore Model and Grain Model to ensure accurate evaluation. Consequently, the results of the experiment allowed for a description of the physical mixing efficiency in catalyst impregnation, and the optimal amount of black liquor additive was established
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Steps to reproduce
Every sample measurement was carried out at prototype isothermal setup for steam gasification at variable temperatures (800-1000 Celsius) and elevated temperature of 10 bar. It was ensured that the outside walls of the reactor have the minimal temperature to hold steam inside (at least 180 Celsius) before steam was introduced. Steam traveled through the reactor for 40 minutes at 2dm3/min of argon stream before the measurement started. Example for data calculation in shown within the files. The energy of activation was calculated with three kinetic models: Random Pore Models, Grain Model and Isoconversional Model. Similarly, the example allowing for reproduction of calculations are provided in the files.