One Question per Day on Synthetic Ammonia (Series 69)
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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)For the series 68186, ( ), what can shift the equilibrium of the methanation reaction to the right?
A. Increase temperature and increase pressure
B. Increase temperature and decrease pressure
C. Decrease temperature and increase pressure
D. Decrease temperature and decrease pressure
187. The commonly used methanation catalyst is a nickel catalyst whose main component is ( ), with alumina as the carrier and magnesium oxide or chromium trioxide as promoters. A、Fe2O3 B、NiO C、Mo D、Fe188. In addition to removing CO, the liquid nitrogen washing method can also remove ( ). A. CO2 and CH4 B. H2 and CO2 C. H2S and CH4 D. CH4 and Ar189. In the tannin desulfurization solution, （ ） can oxidize V4+ to V5+. A、NaVO3 B、Quinone-type tannin C、Phenol-type tannin D、Na2CO3 190. When the load on the synthesis tower is low and the catalyst’s activity is high, it is better to keep the content of inert gases at ( ). A、10%～14% B、14%～16% C、12%～20% D、18%～22% Answer: CBDBC Scoring criteria: 3 points for participation, 1 point for each correct answer
186. (A) Raising the temperature and pressure can shift the equilibrium of the methanation reaction to the right. 187. The commonly used methanation catalyst is a nickel catalyst whose main component is (B) NiO, with alumina as the carrier and magnesium oxide or chromium trioxide as promoters. 188. In addition to removing CO, the liquid nitrogen washing method can also remove (D, CH4, and Ar) simultaneously. 189. In addition to removing CO, the liquid nitrogen washing method can also remove (B, quinone-type tannins) simultaneously. 190. When the load on the synthesis tower is low and the catalyst’s activity is high, it is advisable to keep the inert gas content within the range of (C, 12%～20%).
186. (C) can shift the equilibrium of the methanation reaction to the right. A. Increasing temperature and pressure; B. Increasing temperature and decreasing pressure; C. Decreasing temperature and increasing pressure; D. Decreasing temperature and decreasing pressure. 187. The commonly used methanation catalyst is a nickel catalyst whose main component is (B), with alumina as the carrier and magnesium oxide or chromium trioxide as promoters. A、Fe2O3 B、NiO C、Mo D、Fe 188、In addition to removing CO, the liquid nitrogen washing method can also remove (D). A. CO2 and CH4 B. H2 and CO2 C. H2S and CH4 D. CH4 and Ar 189. In the tannin desulfurization solution, (B) can oxidize V4+ to V5+. A. NaVO3 B. Quinone-type tannin C. Phenol-type tannin D. Na2CO3 190. When the load on the synthesis tower is low and the catalyst’s activity is high, it is better to keep the content of inert gases at (C). A、10%～14% B、14%～16% C、12%～20% D、18%～22%