Petrochemical Products Deep Processing Section 【Weekly Topics】【Daily Question】Prize-winning Submission Call (Ongoing)

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This post was last edited by Guan Gongyu on 2015-9-16 at 14:08. In order to boost the popularity of this forum section and help new members grow more quickly, the Petrochemical Deep Processing section will launch the 【Weekly Topic】 and 【Daily Question】 activities starting from September 16. Given the broad range of topics covered in this section, one person’s efforts are insufficient; by pooling collective wisdom, we are seeking suggestions from everyone for relevant questions to serve as a pool of options for 【Weekly Topics】 and 【Daily Questions». I. Question types: Multiple-choice, true/false, fill-in-the-blank, and short-answer questions are all acceptable. II. Topic content: vapor phase, MTBE, dimethyl ether, liquefied gas aromatization, isobutane dehydration, n-butane isomerization, isobutylene, butadiene, sec-butyl acetate, styrene, polypropylene, polyethylene, resins and plastics, rubber and fiber-containing products; basic raw materials for the petrochemical industry (ethylene, propylene, aromatic hydrocarbons C1, C2, C3, C4, C5, C6). III. [Daily Question] Requirements for replies: the question + answer + explanatory analysis; it’s best to indicate the source of the question to avoid unnecessary disputes. Those who reply by providing the question will receive a financial reward. For example: 1. Multiple-choice question: In a heat exchanger, when the flow directions of the two fluids are opposite, it is called (　　). Answer B: Counterflow heat transfer, because......... or the question comes from...... A. Co-current heat transfer B. Counterflow heat transfer C. Cross-flow heat transfer D. Mixed-flow heat transfer. 2. True or False: In a shell and tube heat exchanger, when the heat transfer area remains constant, the convective heat transfer coefficient is slightly higher when the tubes are arranged in a straight pattern rather than in a crossed pattern. ( ) Answer: Wrong. Because..... or the question comes from..... IV. [Weekly Topic] It should be related to the content of the forum and based on actual production practices; it can be a common problem encountered in production operations, to be discussed by everyone. For example, during a recent equipment maintenance, I was wondering how to empty the materials V. The moderators will select the most meaningful topics from the replies posted by users as 【Weekly Topics】 and 【Daily Questions】; those topics that are chosen will come with additional financial rewards. VI. The 【Weekly Topics】 and 【Daily Questions】 activities are updated daily, and all users are encouraged to participate actively in order to continuously enrich our question bank. To prevent others from seeing the questions, the replies are set to be visible only to the author, so feel free to create questions! This post rejects spammy replies; meaningless ones will be deleted directly.