Fundamental Investigation of Fuel Transformations in Pulverized Coal Combustion and Gasification Technologies Annual Report (open access)

Fundamental Investigation of Fuel Transformations in Pulverized Coal Combustion and Gasification Technologies Annual Report

The goal of this project is to carry out the necessary experiments and analyses to extend leading submodels of coal transformations to the new conditions anticipated in next-generation energy technologies. During the first two projects years, significant progress was made on most of the tasks, as described in detail in the two previous annual reports. In the current third annual report, we report in detail on the BYU task on the properties and intrinsic reactivities of chars prepared at high-pressure. A flat-flame burner was used in a high pressure laminar flow facility to conduct high temperature, high heating rate coal pyrolysis experiments. Heating rates were approximately 10{sup 5} K/s, which is higher than in conventional drop tube experiments. Char samples from a Pitt No.8 coal and lignite were collected at 1300 C at 1, 6, 10, and 15 atm. Swelling ratios of the lignite were less than 1.0, and only about 1.3 for the Pitt No.8 coal. All coals showed slight increases in swelling behavior as pressure increased. The swelling behavior observed for the Pitt No.8 coal at each pressure was lower than reported in high pressure drop tube experiments, indicating the effect of heating rate on particle swelling. This …
Date: January 1, 2004
Creator: Hurt, Robert; Calo, Joseph; Fletcher, Thomas & Sayre, Alan
System: The UNT Digital Library