Effects of operating parameters on Coal Char produced from low temperature Pyrolysis

Abstract

The abstract introduces a study focused on upgrading lignite, an important underutilized energy resource. The study's objective was to investigate advanced methods for boosting lignite's energy content and decreasing its moisture levels. This was accomplished through the utilization of experimental setups involving thermal drying and chemical treatment. The outcomes highlighted a noteworthy 40% increase in the calorific value of lignite, along with a high reduction of moisture content. These advancements hold the potential to enhance energy production efficiency and diminish emissions. The study underscores the feasibility of upgrading lignite, rendering it a cleaner and more viable energy option. This research endeavor encompasses a comprehensive series of thermal laboratory experiments with the aim of transitioning into commercial-scale production. The thermal laboratory experiments yield invaluable insights into the intrinsic thermal properties of Mae Moh coals, indispensable for the advancement and fine-tuning of thermal processes. The focal point of the investigation pertains to the meticulous study of pyrolysis dynamics, encompassing moisture elimination from lignite and devolatilization of dry basis lignite across a spectrum of particle sizes namely, 0.25 mm, 0.85 mm, 1 mm, and 2.36 mm, executed at varying temperatures spanning from 250°C to 600°C. The outcomes garnered align harmoniously with the established methodological framework underpinning ultimate analysis, as prescribed by ASTM 3172-76. Employing a fixed-bed reactor configuration, the research scrutinizes the interplay between moisture content and volatile components within lignite, under diverse final temperature conditions. The completion of moisture evaporation and low-volatile decomposition at a significantly lower temperature is specifically within the vicinity of 350°C. This research voyage plays a pivotal role in efficiency, cost-effectiveness, convenience, and safety.