One Question per Day on Synthetic Ammonia (Series 20)
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Multiple-choice question (fill in the correct option in the brackets) Series 19: 96. (B-A-010) During the reduction of ammonia synthesis catalysts, increasing the reduction pressure can ( ) the temperature difference across the same plane. (A) Shrink (B) Expand (C) Remain unchanged (D) Shrink or expand 97. (B-A-010) The reducing gas used in ammonia synthesis catalysts is ( ). (A) Water vapor (B) Hydrogen (C) Carbon dioxide (D) Methane 98. (B-A-011) The reducing gas most commonly used in low-temperature shift catalysts is ( ). (A) Natural gas (B) Water vapor (C) N2 (D) H2 99. (B-A-011) The reduction rate of low-temperature shift catalyst is proportional to the ( ) power of the H2 partial pressure. (A) 1 (B) 2 (C) 3 (D) 1.5 100. (B-A-011) At an inlet H2 concentration of 2% for catalyst type B204, the induction period at 180°C is ( ) minutes. (A) 5 (B) 4 (C) 3 (D) 2 ABCAC Scoring criteria: 3 points for participation, 8 points for a completely correct answer.
96. (B-A-010) During the reduction of ammonia synthesis catalysts, increasing the reduction pressure can (A) reduce the temperature difference across the same plane. (A) Shrink (B) Expand (C) Remain unchanged (D) Shrink or expand 97. (B-A-010) The reducing gas used in ammonia synthesis catalysts is (B). (A) Water vapor (B) Hydrogen (C) Carbon dioxide (D) Methane 98. (B-A-011) The reducing gas most commonly used in low-temperature shift catalysts is (C). (A) Natural gas (B) Water vapor (C) N2 (D) H2 99. (B-A-011) The reduction rate of low-temperature shift catalyst is proportional to the (A)th power of the H2 partial pressure. (A) 1 (B) 2 (C) 3 (D) 1.5 100. (B-A-011) At an inlet H2 concentration of 2% for catalyst type B204, the induction period at 180°C is (C) minutes. (A) 5 (B) 4 (C) 3 (D) 2
96. (B-A-010) During the reduction of ammonia synthesis catalysts, increasing the reduction pressure can (A) increase the temperature difference within the same plane. (A) Shrink (B) Expand (C) Remain unchanged (D) Shrink or expand 97. (B-A-010) The reducing gas used in ammonia synthesis catalysts is (B). (A) Water vapor (B) Hydrogen (C) Carbon dioxide (D) Methane 98. (B-A-011) The reducing gas most commonly used for low-temperature shift catalysts is (A). (A) Natural gas (B) Water vapor (C) N2 (D) H2 99. (B-A-011) The reduction rate of low-temperature shift catalyst is proportional to the (B)th power of the H2 partial pressure. (A) 1 (B) 2 (C) 3 (D) 1.5 100. (B-A-011) At an inlet H2 concentration of 2% for catalyst type B204, the induction period at 180°C is (C) minutes. (A) 5 (B) 4 (C) 3 (D) 2
Answer: A B C A C