We know that C 2 H 6 /C 2 H 4 appeared later than C 2 H 4 , and as the temperature rose rapidly, it reached its maximum in the critical temperature range and then decreased rapidly. At the beginning of the experiment, CO 2 /CO first decreased and then increased with the increase of coal temperature, and as the temperature continued to rise, the CO 2 /CO showed a trend of rapid decline. 2.1.2.
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