- Author
- Fong, W. S.
- Title
- Plasticity and Agglomeration in Coal Pyrolysis.
- Coporate
- Massachusetts Institute of Technology, Cambridge
- Report
- Thesis, February 1986, 206 p.
- Keywords
- coal | pyrolysis | plastics | agglomerates | experiments | mathematical models | high temperature
- Identifiers
- Pittsburg Number (No.) 8 Seam bituminous coal; high heating rates; plastometer
- Abstract
- Two new techniques were developed to study the plastic behavior of softening coals at severe conditions, i.e. high heating rates and high temperatures pertinent to modern coal conversion processes but previously unattainable with conventional instruments. A Pittsburgh No. 8 Seam bituminous coal was used mainly in this stody. A fast response plastometer was developed to measure the apparent viscosity of a rapidly pyrolyzing coal. The plastometer determines the torque required for constant speed rotation of a thin disk embedded in a thin layer of packed coal particles heated electrically between two parallel metal plates. Heating rates, final temperatures and sample residence times at final temperatures can be separately selected and controlled over the ranges 40 - 1000 K/s, 600 - 1250 K, and 0 - 40s respectively. The instrument can be operated in hydrogen or inert gas atmospheres from vacuum to 100 atm.