One Question per Day on Synthetic Ammonia (Series 43)
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I. Multiple-choice questions (each question has 4 options, of which only 1 is correct; fill in the correct option in the brackets). Continuing from Series 42, 211: The function of the saturation tower is to raise the temperature of the feed gas and increase the content of ( ) in it. A、CO B、CO2 C、H2O(g) D、CH4 212、During the defoaming process using tannin, （ ） in the defoaming solution can react with NaHS to produce sodium metavanadate in a reduced form, thereby allowing elemental sulfur to precipitate. A、Na2CO3 B、NaHCO3 C、NaVO3 D、NaOH 213、Which component in the feed gas can temporarily poison iron-chromium catalysts? A. Dust B. H2S C. Phosphorus and arsenic D. Inorganic salts 214. When a pressure overload occurs during the operation of a fixed-bed reactor, what is the emergency measure that needs to be taken? A. Open the inlet vent valve for venting. B. Open the outlet vent valve for venting. C. Add an inert gas. D. Lower the temperature. 215. There is no strict requirement regarding the type of reactor to be used in an industrial production process for a given reaction, but the primary consideration is to meet ( ). A. Process requirements B. Reducing energy consumption C. Easy operation D. Compact design. Answer: C C B B A. The scoring starts at 3 points, with 1 point added for each correct answer.
CCBBA~~~~~~~~~~~
211. The function of the saturation tower is to raise the temperature of the feed gas and increase the content of (C, H2O(g)) in it. 212. During desulfurization using the tannin method, (C, NaVO3) in the desulfurization solution can react with NaHS to form reducible sodium metavanadate, thereby precipitating elemental sulfur. 213. (B, H2S) in the feed gas can temporarily poison iron-chromium catalysts. 214. When a pressure excess occurs during the operation of a fixed-bed reactor, the emergency measure that needs to be taken is (B: opening the outlet vent valve to release pressure). 215. There are no strict regulations regarding the type of reactor to be used for a reaction process in industrial production; priority is given to meeting (A) the process requirements.
211. The function of the saturation tower is to raise the temperature of the feed gas and increase the content of (C) in it. A、CO B、CO2 C、H2O(g) D、CH4 212、During the deliming process using tannin, (C) in the desulfurization solution can react with NaHS to form sodium reduced vanadate, which leads to the precipitation of elemental sulfur. A、Na2CO3 B、NaHCO3 C、NaVO3 D、NaOH 213、(B) in the feed gas can temporarily poison iron-chromium catalysts. A. Dust B. H2S C. Phosphorus and arsenic D. Inorganic salts 214. When a pressure overload occurs during the operation of a fixed-bed reactor, the emergency measure that needs to be taken is (B). A. Open the inlet vent valve for venting. B. Open the outlet vent valve for venting. C. Add an inert gas. D. Lower the temperature. 215. There is no strict requirement regarding the type of reactor to be used in an industrial production process for a given reaction, but the primary consideration is to meet (A). A. Process requirements B. Reducing energy consumption C. Easy operation D. Compact structure