The Influence of Impurities on the Chocking Process of Supercritical Carbon Dioxide Pipeline

The Influence of Impurities on the Chocking Process of Supercritical Carbon Dioxide Pipeline
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杂质对超临界二氧化碳管道堵塞过程的影响

DOI:
10.15764/ojces.2014.02003
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发表时间:
2014-08
期刊:
OPEN JOURNAL OF CHEMICAL ENGINEERING AND SCIENCE
影响因子:
--
通讯作者:
Yuxing LI
Yuxing LI
中科院分区:
其他
文献类型:
--
作者:
Qing ZHAO;Qiuyang LI;Yuxing LI

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超临界二氧化碳管道的运输安全是碳捕获与封存(CCS)的一个关键方面。为降低超临界管道发生意外情况时的高压,采用堵塞工艺进行人为泄压。可以基于绝热过程假设来预测阻塞过程的下游参数。 SO2 作为杂质的存在有助于提高通过阻流装置的下游温度,以防止冻结危险,而 N2 作为杂质的存在表明下游温度较低。当采用多级堵塞时,较高的初始温度可以防止通风管出口处形成干冰。关键词—CCS、二氧化碳、管道输送、杂质、堵塞过程
Transportation safety of supercritical CO2 pipeline is a key aspect of Carbon Capture and Storage(CCS). For reducing the high pressure in supercritical pipeline when accidental cases arise, man-made release will be applied using chocking process. The downstream parameters of chocking process can be predicted based on the adiabatic process assumption. The presence of SO2 as an impurity is helpful for increasing the downstream temperatures through the chocking device to prevent the frozen hazard, whereas the presence of N2 as an impurity indicates a lower downstream temperature. The higher initial temperature can prevent the dry ice formation at the outlet of vent pipe when the multistage chocking is applied. Keywords—CCS, carbon dioxide, pipeline transportation, impurity, chocking process
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