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Corrosion by Aqueous Piperazine at 40–150 °C in Pilot Testing of CO2 Capture
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-14 , DOI: 10.1021/acs.iecr.9b05735 Ching-Ting Liu 1 , Kent B. Fischer 1 , Gary T. Rochelle 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-14 , DOI: 10.1021/acs.iecr.9b05735 Ching-Ting Liu 1 , Kent B. Fischer 1 , Gary T. Rochelle 1
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Corrosion data from two pilot plant activities of CO2 capture are presented. The pilot plant used 5 m (30 wt %) of aqueous piperazine (PZ) and the advanced stripper (PZAS). 316L stainless steel experienced high corrosion at high temperatures, and the corrosion rate showed strong dependence on temperature. The unexpected vulnerability of 316L was due to the uniquely high operating temperature of PZAS. PZ degradation also had an effect on 316L corrosion. 304 stainless steel and 2205 duplex stainless steel performed well at all temperatures and can be good alternative construction materials for PZAS. Fluid velocity played a bigger role in carbon steel corrosion than temperature because carbon steel corrosion in PZ depends on protective siderite films. Stagnant fluid in the sumps allowed for the formation of compact, protective films, while high-velocity flow might inhibit such film formation. Selective dissolution of Ni from Ni-based alloys into PZ occurred in narrow gaps between alloy and washers. Such localized corrosion can make these alloys not ideal at the joints in pipelines.
中文翻译：
在40–150°C的哌嗪水溶液中进行CO 2捕集试验的腐蚀
来自两个CO 2试点工厂活动的腐蚀数据捕获被呈现。中试工厂使用了5 m（30 wt％）的哌嗪水溶液（PZ）和高级汽提塔（PZAS）。316L不锈钢在高温下会发生高腐蚀，并且腐蚀速率表现出对温度的强烈依赖性。316L出乎意料的漏洞是由于PZAS独特的高工作温度。PZ降解也对316L腐蚀有影响。304不锈钢和2205双相不锈钢在所有温度下均表现良好，可以作为PZAS的良好替代建筑材料。流体速度在碳钢腐蚀中比温度起更大的作用，因为PZ中的碳钢腐蚀取决于保护性菱铁矿膜。收集池中积滞的液体允许形成致密的保护膜，而高速流动可能会抑制这种膜的形成。Ni从Ni基合金到PZ的选择性溶解发生在合金和垫圈之间的狭窄缝隙中。这种局部腐蚀会使这些合金在管道的接头处不理想。
更新日期：2020-02-14
中文翻译：
在40–150°C的哌嗪水溶液中进行CO 2捕集试验的腐蚀
来自两个CO 2试点工厂活动的腐蚀数据捕获被呈现。中试工厂使用了5 m（30 wt％）的哌嗪水溶液（PZ）和高级汽提塔（PZAS）。316L不锈钢在高温下会发生高腐蚀，并且腐蚀速率表现出对温度的强烈依赖性。316L出乎意料的漏洞是由于PZAS独特的高工作温度。PZ降解也对316L腐蚀有影响。304不锈钢和2205双相不锈钢在所有温度下均表现良好，可以作为PZAS的良好替代建筑材料。流体速度在碳钢腐蚀中比温度起更大的作用，因为PZ中的碳钢腐蚀取决于保护性菱铁矿膜。收集池中积滞的液体允许形成致密的保护膜，而高速流动可能会抑制这种膜的形成。Ni从Ni基合金到PZ的选择性溶解发生在合金和垫圈之间的狭窄缝隙中。这种局部腐蚀会使这些合金在管道的接头处不理想。
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