One Question per Day on Synthetic Ammonia (Series 46)
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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) Series 45, 226. Compared with batch gasification, the advantage of oxygen-steam continuous gasification is ( ). A. Short effective gas generation time B. High coal gas yield C. Low hydrogen content in semi-water gas D. Low gasification intensity. 227. In the raw gas produced from coal as a feedstock, the main component of sulfides is ( ). A. Carbon disulfide B. Thiol C. Hydrogen sulfide D. Thioether 228. According to research, the reaction rate of zinc oxide-based desulfurization is controlled by internal diffusion; therefore, an effective measure to increase the desulfurization rate is ( ). A. Reducing pressure B. Lowering temperature C. Increasing gas flow velocity D. Increasing the porosity of the zinc oxide solid particles 229. In a shift converter, the purpose of installing the catalyst in segments is ( ). A. For easy filling B. To enable reaction as close as possible to the optimal temperature range C. For safety reasons D. To simplify the process. 230. Generally, in chemical absorption desulfurization, ( ) solutions are used to absorb the acidic gas hydrogen sulfide. A. Acidic B. Neutral C. Alkaline D. Electrolyte Answer: B C D B C Scoring criteria: 3 points for participation, 1 point for each correct answer, and 1 additional point for hiding the answer. It should be specifically noted that, in order to help everyone remember the practice of hiding answers, starting with this daily question, requests will occasionally be made for respondents 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
Answer: B C D B C
This post was last edited by penghh1985 on 2016-3-19 17:04. 226. Compared with intermittent gasification, the advantage of oxygen-steam continuous gasification is ( ). B. High gas yield
This post was last edited by penghh1985 on 2016-3-19 at 17:05. In the raw gas produced from coal as a raw material, the main component of sulfides is (C). According to research, the reaction rate of zinc oxide-based desulfurization is controlled by internal diffusion; therefore, an effective measure to increase the desulfurization speed is (D) to increase the porosity of the zinc oxide solid particles. In a shift converter, the purpose of installing the catalyst in sections is (B) to enable reactions to take place as closely as possible around the optimal temperature range. Generally speaking, chemical absorption methods for desulfurization involve using (C) alkaline solutions to absorb the acidic gas hydrogen sulfide.
226. Compared with intermittent gasification, the advantage of oxygen-steam continuous gasification is (B). A. Short effective gas generation time B. High coal gas yield C. Low hydrogen content in semi-water gas D. Low gasification intensity. 227. In the raw gas produced from coal as a raw material, the main component of sulfides is (C). A. Carbon disulfide B. Thiol C. Hydrogen sulfide D. Thioether 228. According to research, the reaction rate of zinc oxide-based desulfurization is controlled by internal diffusion; therefore, an effective measure to increase the desulfurization rate is (D). A. Reducing pressure B. Lowering temperature C. Increasing gas flow velocity D. Increasing the porosity of the zinc oxide solid particles 229. In a shift converter, the purpose of installing the catalyst in segments is (B). A. For easy loading B. To react as closely as possible around the optimal temperature range C. For safety reasons D. To simplify the process. 230. Generally, in chemical absorption desulfurization, acidic gas hydrogen sulfide is absorbed using (C) solution. A、Acidic B、Neutral C、Alkaline D、Electrolyte
This post was last edited by penghh1985 on 2016-3-19 17:05. 226. Compared with intermittent gasification, the advantage of oxygen-steam continuous gasification is (B: higher coal gas yield). A. Short effective gas generation time B. High coal gas yield C. Low hydrogen content in semi-water gas D. Low gasification intensity. 227. In the raw gas produced from coal as a raw material, the main component of sulfides is (C. Hydrogen sulfide). A. Carbon disulfide B. Thiol C. Hydrogen sulfide D. Thioether 228. According to research, the reaction rate of zinc oxide-based desulfurization is controlled by internal diffusion; therefore, an effective measure to increase the desulfurization rate is (D. Increasing the porosity of the zinc oxide solid particles). A. Reducing pressure B. Lowering temperature C. Increasing gas flow velocity D. Increasing the porosity of the zinc oxide solid particles 229. In a shift converter, the purpose of installing the catalyst in segments is (B. To enable reactions to occur as closely as possible around the optimal temperature range). A. For easy loading B. To react as closely as possible around the optimal temperature range C. For safety reasons D. To simplify the process. 230. Generally, in chemical absorption desulfurization, (C. alkaline) solutions are used to absorb the acidic gas hydrogen sulfide. A、Acidic B、Neutral C、Alkaline D、Electrolyte
This post was last edited by penghh1985 on 2016-3-19 17:05: B C D B C