One Question per Day on Synthetic Ammonia (Series 16)

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This post was last edited by penghh1985 on 2016-2-19 08:19. Multiple-choice question (fill in the correct option in the brackets). Continuing from series fifteen 76. (B-A-003) In industry, the iron ratio of synthetic catalysts used at pressures above 15 MPa is generally controlled at ( ). (A) 0.5～0.6 (B) 0.3～0.4 (C) 0.55～0.65 (D) 0.35～0.65 77. (B-A-004) The medium-temperature shift catalysts used in large ammonia plants employing the hydrocarbon steam conversion method operate mostly within the range of ( )°C. (A) 330～450 (B) 370～400 (C) 380～420 (D) 370～410 78. Medium-temperature shift catalysts include several types such as ( ). (A) B204 (B) Z107 (C) A301 (D) B110 79. The service life of the medium-temperature catalyst in (B-A-004) is ( ) years. (A) 1 (B) 2 (C) 3 (D) 3-5 80. (B-A-005) The bulk density of B110-2 is between ( ) kg/l. (A) 1.1～1.2 (B) 1.2～1.3 (C) 1.4～1.6 (D) 1.4～1.5 C A D D C Scoring criteria: 3 points for participation, plus 5 points for answering all questions correctly.