“…27 Clarke claimed that coke is mainly formed from CH 3 Cl cracking on copper, e.g., 2Cu + 2CH 3 Cl → 2CuCl + CH 4 + H 2 + C. 29 Wessel et al reported an enhanced coke deposition at higher reaction temperatures. 30 It has also been reported that insufficient fluidization in the reactor may lead to the formation of localized hot spots, 31 up to 1000 °C during the industrial direct synthesis, thereby facilitating thermal cracking of CH 3 Cl. The deposited coke may contain chlorine, in which case it has been found to further catalyze the cracking process at lower temperatures, i.e.…”