【Daily Question】August 2: H2/CH4 ratio in the dry gas of the catalytic cracking unit
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This post was last edited by 3FCCtaofeng on 2015-8-2 at 11:03. Daily question for the activity (single-choice question): Under all other identical operating conditions, in March 2008, the metal contents in the catalyst bed were as follows: iron 7000 ppm, vanadium 1000 ppm, nickel 7000 ppm, calcium 6000 ppm； In July 2008, the metal contents in the balance agent were: iron at 8000 ppm, vanadium at 3000 ppm, nickel at 8500 ppm, and calcium at 7000 ppm. Therefore, the H2/CH4 ratio in the dry gas in July 2008 would be compared to that in March 2008: A) Higher, B) Lower, C) No significant change, D) Uncertain. Answer: A, Higher (since the increase in metal content leads to more dehydrogenation reactions during the reaction process). This leads to an increase in the hydrogen content in the dry gas. Everyone is encouraged to participate actively for prizes. +5 points for correct answers, +2 points for participation. One time per person only. Close this topic in two days.
A, increase. ------------------------
In July 2008, the H2/CH4 ratio in dry gas will be higher than in March 2008 (A, increased)
A is rising! ! ! ! ! ! ! ! !
So, the H2/CH4 ratio in dry gas in July 2008 will be higher than that in March 2008 (d)
Under conditions where all other operating parameters were the same in a certain catalytic cracking unit, the metal contents in the balance agent in March 2008 were as follows: iron at 7000 ppm, vanadium at 1000 ppm, nickel at 7000 ppm, and calcium at 6000 ppm； In July 2008, the metal contents in the balance agent were: iron at 8000 ppm, vanadium at 3000 ppm, nickel at 8500 ppm, and calcium at 7000 ppm. Therefore, the H2/CH4 ratio in the dry gas in July 2008 would be (A) compared to March 2008. A) Higher B) Lower C) No significant change D) Uncertain
In July 2008, the H2/CH4 ratio in dry gas will be higher than in March 2008 (A, increased)
B. Reduce.................
A: An elevated H2 content leads to catalyst poisoning.