The issue of N2 in gas
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Our company’s two batches of coke ovens have capacities of 4.3 M and 5.5 M respectively. The N2 content in the gas produced (after purification) by the 4.3 M oven is around 5%, while the H2 content is 55-56%. In the case of the 5.5 M oven, the N2 content is 8-9%, with an H2 content of 52-52%. I would like to know where the N2 comes from – from air, or from the decomposition of coal-derived products? Also: The O2 content is roughly the same
Check whether the air excess coefficient is too high, whether the coke oven is operating under negative pressure, and whether the seals on the furnace door exchange cocks are tight.
N2 is produced by the decomposition of coal during the coking process.