ABSTRACT
Previous chapters discussed the large set of experiments that were performed on a single set of oil shale samples (GR1, GR2, and GR3) and their pyrolysis products from the Skyline 16 oil shale core, drilled in the Green River Formation of eastern Utah. This chapter focuses on heat and mass transport effects in larger core samples from the Skyline 16 core and from other cores elsewhere in the Mahogany zone of the Green River Formation in Utah. It describes experiments for determining the magnitude of the effects of four factors (core size, heating regime, pressure, and temperature) on products from oil shale pyrolysis. It is shown that each of the four factors contributes to oil
CONTENTS
7.1 Background ................................................................................................. 158 7.2 Oil Shale Pyrolysis Experiments ............................................................. 159
7.2.1 Oil Shale Characterization............................................................ 159 7.2.1.1 S1 and S2 ........................................................................... 159 7.2.1.2 GR1, GR2, and GR3 ......................................................... 160
7.2.2 Experimental Procedures ............................................................. 161 7.2.2.1 TGA Pyrolysis Experiments on S1 and S2 Samples .....161 7.2.2.2 TGA Pyrolysis Experiments on GR Samples .............. 163 7.2.2.3 S1 and S2 Multiscale Pyrolysis Experiments .............. 164 7.2.2.4 Skyline 16 Multiscale Pyrolysis Experiments ............. 166 7.2.2.5 Pyrolysis Product Analysis ............................................ 166
7.3 Pyrolysis Experimental Results and Discussion ................................... 167 7.3.1 Determination of Oil Shale Pyrolysis Rates Using TGA Data .....167 7.3.2 TGA Results for GR Samples and Their Kerogen Isolates ....... 168 7.3.3 Multiscale Pyrolysis Results ......................................................... 170
7.3.3.1 Pyrolysis of Powder Sample (S1) ................................... 170 7.3.3.2 Pyrolysis of 0.75 in. Diameter S2 Core ......................... 172 7.3.3.3 Pyrolysis of 1 in. Diameter S2 Core .............................. 174 7.3.3.4 Pyrolysis of 2.5 in. Diameter S2 Core ........................... 174 7.3.3.5 Pyrolysis of 1 in. Diameter GR Cores ........................... 179
7.3.4 Comparison of Multiscale Core Pyrolysis Results .................... 183 7.4 Summary and Conclusions ...................................................................... 185 References ............................................................................................................. 185
yield and to product distribution. These factors may be used in enhancing the techniques that exist for the production of shale oil from oil shale pyrolysis.
