One Question per Day on Synthetic Ammonia (Series 15)

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This post was last edited by penghh1985 on 2016-2-16 at 15:58. Multiple-choice question (fill in the correct option in the brackets). Continuing from Series 14, question 71: (B-A-002) The common cause of catalyst failure is generally ( ). (A) Poisoning (B) Chemical blockage (C) A and B (D) Water immersion 72. (B-A-002) If the CO content at the low-temperature gas outlet is reduced by 0.1%, the output can be increased ( ). (A) 1.1%–1.6% (B) 2% (C) 3% (D) 3.5% 73. (B-A-002) A trace amount of ( ) can also be produced on low-volatility catalysts. (A) Methanol (B) NH3 (C) Propane (D) Methylamine 74. (B-A-003) The main catalyst component in ammonia synthesis catalysts is added in the form of refined natural ( ) ore. (A) Ferrous sulfur (B) Magnet (C) Copper (D) Zinc 75. (B-A-003) The main component of medium-temperature shift catalyst is ( ). (A) Iron (B) Chromium (C) A and B (D) Zinc 71.C 72.A 73.A 74.B 75.C Scoring criteria: 3 points for participation, 1 point for each correct answer. It should be specifically noted that respondents are required to hide their answers. If the responder is not hidden, they must participate in scoring. For methods to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html