One Question per Day on Synthetic Ammonia (Series 34)
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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 33, 166: Through a transformation reaction, CO can be removed, and at the same time an equal volume of ( ) can be produced. A、N2 B、O2 C、H2 D、Cl2 167. When converting CO, using ( ) method can increase the conversion rate of CO. A. Raise the temperature B. Lower the temperature C. Increase the pressure D. Decrease the pressure 168. The main component of iron-chromium catalysts before reduction is ( ). A、Fe3O4 B、Fe2O3 C、Cr2O3 D、Al2O3169、Before use, ferro-chromium catalysts are usually reduced using ( ) from gas. A. H2 and CO B. H2 and CO2 C. H2 and H2O D. H2 and H2S 170. During the conversion process, if the concentration of ( ) in the feed gas is too high, it will cause the furnace temperature to rise rapidly, leading to overheating of the catalyst and even its sintering. A、H2O B、CO2 C、O2 D、N2 Answer: C B B A C. The scoring starts at 3 points, with 1 point added for each correct answer. It should be specifically noted that respondents are required to hide their answers. If the answerer’s score is not hidden, it is halved. For methods to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html
This post was last edited by 654262293 on 2016-3-7 14:21: C B B A C
Answer: C B B A C
166. Through a transformation reaction, not only can CO be removed, but also an equal volume of (C) can be produced. A、N2 B、O2 C、H2 D、Cl2 167. When converting CO, using (B) method can increase the conversion rate of CO. A. Raise the temperature B. Lower the temperature C. Increase the pressure D. Decrease the pressure 168. The main component of iron-chromium catalysts before reduction is (B). A、Fe3O4 B、Fe2O3 C、Cr2O3 D、Al2O3169、Before use, ferro-chromium catalysts are usually reduced using ( A ) from gas. A. H2 and CO B. H2 and CO2 C. H2 and H2O D. H2 and H2S 170. In the conversion process, if the content of (C) in the feed gas is too high, it will cause the furnace temperature to rise rapidly, leading to overheating of the catalyst and even its sintering. A、H2O B、CO2 C、O2 D、N2
This post was last edited by 654262293 on 2016-3-7 17:14. Through a transformation reaction, CO can be removed, and at the same time an equal volume of (c) can be produced. C, H2
This post was last edited by 654262293 on 2016-3-7 17:14. When performing CO conversion, using method (b) can increase the CO conversion rate. B. Lowering the temperature. 168. The main component of iron-chromium catalysts before reduction is (b). B. Fe2O3 169: Before use, ferro-chromium catalysts are usually reduced using ( ) from gas. A, H2, and CO 170: During the conversion process, if the concentration of (c) in the feed gas is too high, it can cause the furnace temperature to rise rapidly, leading to overheating of the catalyst and even its sintering. C, O2