【Daily Question No. 276】2018.10.09
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【Daily Question No. 276】October 09, 2018: Briefly describe the mechanism of carbon deposition on hydrogenation catalysts Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites where strong adsorption occurs; this in turn covers the active sites and **reduces the surface utilization rate of the catalyst’.** (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant drop in its activity; therefore, an increase in temperature is needed to compensate for this
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for strong adsorption; this in turn covers the active sites and **reduces the surface utilization efficiency of the catalyst**‘’
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for adsorption, which **reduces the surface utilization efficiency of the catalyst. In the early stages of the reaction, the amount of carbon deposition increases rapidly, and the catalyst’s activity declines accordingly. In the later stage, excessive carbon buildup blocks the pores of the catalyst, resulting in a significant decrease in its activity; therefore, an increase in temperature is needed to compensate for this.
Due to the presence of acidic sites, carbon deposits gradually form on the surface of the catalyst. Carbon deposition reduces the catalyst’s activity, as carbon-forming compounds strongly adsorb onto the acidic sites, covering those active sites. Moreover, the accumulation of coke blocks the pores, preventing reactants from reaching the active sites for strong adsorption, thereby covering them and **reducing the surface utilization efficiency of the catalyst.