Sulfuric Acid Section – Daily Question for November 29th

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This post was last edited by “I Love Chemical Engineering” on November 29, 2011, at 10:30. 1. Please hide your replies; editing after posting is not possible! Delete directly without hiding! 2. Method for hiding: http://bbs.hcbbs.com/thread-492556-1-1.html. 3 Points will be added for correct answers; everyone who participates will receive a reward. In the industrial production of sulfuric acid, which of the following production operations and the explanations for those operations are both correct? A. Sulfide ore needs to be crushed before combustion, as large pieces of it cannot be burned. B. The flue gas coming out of the boiling furnace needs to be purified, as SO2 in the flue gas reacts with impurities. C. A catalyst is required for the oxidation of SO2 to SO3, which helps to increase the conversion rate of SO2. D. SO3 is absorbed using 98% concentrated H2SO4, in order to prevent the formation of acid mist and ensure complete absorption of SO3. Explanation: Crushing pyrite speeds up the burning rate and ensures a more complete reaction ； The main purpose of purifying SO2 is to prevent impurities from poisoning the catalyst ； Catalysts can only increase the reaction rate; they cannot increase the conversion rate of SO2. Answer: D