Figure 1
From: Release of organic nitrogen compounds from Kerogen via catalytic hydropyrolysis
Partial mass chromatograms representing (a, b and c) methylcarbazoles (m/z 181), (d, e and f) C2-carbazoles (m/z 195), and (g, h and i) benzocarbazole (m/z 217) isomers [a], [b] and [c] isolated from Kimmeridge Clay hydropyrolysates, sample KC3 (upper traces, see Table 1) and sample KC4 (middle traces, see Table 1) and the Kimmeridge Clay Formation sourced Miller oil (lower traces). Key: 1 = 1-methylcarbazole (MC), 2 = 3-MC, 3 = 2-MC, 4 = 4-MC; C2-carbazoles, 5 = 1,8-dimethylcarbazole (DMC), 6 = 1-ethylcarbazole, 7 = 1,3-DMC, 8 = 1,6-DMC, 9 = 1,7-DMC, 10 = 1,4-DMC + 4-ethylcarbazole + 1,5-DMC + 3-ethylcarbazole, 11 = 2,6-DMC, 12 = 2,7-DMC, 13 = 1,3-DMC, 14 = 2,4-DMC, 15 = 2,5-DMC, 16 = 2,3-DMC, 17 = 3,4-DMC.