One Question per Day on Synthetic Ammonia (Series **)
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Single-choice question (fill in the correct option in the brackets) Series 17, Question 86: (B-A-007) When a highly variable catalyst containing CrO3 is reduced, the temperature increase per 1% increase in its content is ( ) °C. (A) 100 (B) 10 (C) 50 (D) 75. 87. (B-A-007) High-volatility sulfur compounds require their sulfur content to be less than ( ) PPm. (A) 0.5 (B) 1 (C) 0.2 (D) 0.4 88. (B-A-007) The overall conversion rate in the transformation process is around ( ). (A) 90% (B) 95% (C) 99% (D) 92% 89. (B-A-008) During the reduction phase, low-activity catalysts can increase the reaction temperature and H2 concentration in order to shorten this reduction period. (A) Initial (B) Main (C) Final (D) Induced 90. (B-A-008) The low-temperature catalyst appears ( ) in color. (A) White (B) Sky blue (C) Green (D) Brown. Scoring criteria: 3 points for participation, 8 points for a completely correct answer.
86. (B-A-007) When a highly variable catalyst contains CrO3, the temperature rise per 1% content is (A) °C. (A) 100 (B) 10 (C) 50 (D) 75. 87. (B-A-007) High-volatility sulfur compounds require their sulfur content to be less than (C) PPm. (A) 0.5 (B) 1 (C) 0.2 (D) 0.4 88. (B-A-007) The overall conversion rate in the transformation process is around (C). (A) 90% (B) 95% (C) 99% (D) 92% 89. (B-A-008) In the reduction phase (C), a low-activity catalyst can increase the reaction temperature and H2 concentration in order to shorten the reduction period. (A) Initial (B) Main (C) Final (D) Induced 90. (B-A-008) The low-activity catalyst appears (D) in color. (A) White (B) Sky blue (C) Green (D) Brown
Answer: A C C C D