Mass and Elements Balance of Polish and Czech Hard Coal Pyrolysis Process

A Predictive Model for Coal Coking Based on Product Yield and Energy Balance

“…To balance the coking process, mass yields were determined for individual coking products, and physical and chemical analyses were performed, yielding the following data: tar, BTX, process gas, pyrogenic water, ammonia, and hydrogen sulphide. [19] The coking process proceeds as follows: The retort with the coal charge (1) was placed in an oven (2) and heated up to 900-920 • C. Twenty min after placing the retort in the oven and reconnecting the oven heating sections to the mains, the temperature at the retort wall reached about 800 • C. Further heating was adjusted to produce temperature increase increments for the oven heaters of 1.5 • C per min. Once the heater temperature of 950 • C was obtained, the retort was held at this temperature until the gas emission rate decreased below 0.5 dm 3 per min.…”

“…At equal volume intervals, samples of the released gas were taken (11). To balance the coking process, mass yields were determined for individual coking products, and physical and chemical analyses were performed, yielding the following data: tar, BTX, process gas, pyrogenic water, ammonia, and hydrogen sulphide [19].…”