In situ PXRD analysis on the kinetic effect of PVP-K90 and PVCap on methane hydrate dissociation below ice point
文献类型：期刊论文
| 作者 | Zhou, Xuebing1,2,3,4; Zhang, Qian3; Long, Zhen1,2,3; Liang, Deqing1,2,3,4
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| 刊名 | FUEL
 |
| 出版日期 | 2021-02-15 |
| 卷号 | 286页码:9 |
| 关键词 | Methane hydrate Hydrate dissociation X-ray diffraction Self-preservation effect |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2020.119491 |
| 通讯作者 | Liang, Deqing(liangdq@ms.giec.ac.cn) |
| 英文摘要 | Kinetic hydrate inhibitors (KHIs) have been developed as an alternative for the prevention of hydrate plug in natural gas transportations due to economic and environmental factors. To understand the kinetic performance of KHIs comprehensively, dissociations of CH4 hydrates in the presence of PVP-K90 and PVCap were investigated below ice point. Cryo-SEM and in situ PXRD were used to provide a microscopic insight on the dissociation kinetics. Results showed that a typical CH4 hydrate dissociation at 268 K could be divided into 4 stages. The selfpreservation effect took place in the second stage accompanied with an rise in the ratio of Ih(002) to Ih(100) peaks from 0.5 to 1.1. About 30% of CH4 hydrates were suggested to dissociate into plate-like ice to form ice coatings on hydrate surface. In the presence of PVP-K90 or PVCap, the self-preservation stage reduced greatly and the initial dissociation rates of CH4 hydrates were found enhanced as the concentrations of the KHIs increased from 0.5 to 2.0 wt%. SEM images revealed that PVP-K90 was suggested to be included in the small ice crystals embedded in hydrate phase and hinder the connections of the plate-like ice crystals on hydrate surface, while PVCap was found to induce a dendritic growth of CH4 hydrate, leading to a surge in the specific surface area of CH4 hydrates which was not beneficial to the formation of ice coatings on hydrate phase. Therefore, both PVP-K90 and PVCap promoted hydrate dissociation below ice point by inhibiting the formation of selfpreservation effect. |
| WOS关键词 | ANOMALOUS PRESERVATION ; SELF-PRESERVATION ; GAS ; DECOMPOSITION ; DEPENDENCE ; REMOVAL ; STORAGE ; TEMPERATURE ; PERFORMANCE ; TECHNOLOGY |
| 资助项目 | National Natural Science Foundation of China[51706230] ; National Key Research and Development Plan of China[2017YFC0307306] ; Guangdong Natural Science Foundation[2020A1515010374] ; Guangdong MEPP Fund[GDOE [2019]A39] ; Guangdong Special Support Program-Local innovation and entrepreneurship team project[2019BT02L278] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000598728800003 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Plan of China ; Guangdong Natural Science Foundation ; Guangdong MEPP Fund ; Guangdong Special Support Program-Local innovation and entrepreneurship team project |
| 源URL | [http://ir.giec.ac.cn/handle/344007/32367]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Liang, Deqing |
| 作者单位 | 1.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.CAS Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Xuebing,Zhang, Qian,Long, Zhen,et al. In situ PXRD analysis on the kinetic effect of PVP-K90 and PVCap on methane hydrate dissociation below ice point[J]. FUEL,2021,286:9. |
| APA | Zhou, Xuebing,Zhang, Qian,Long, Zhen,&Liang, Deqing.(2021).In situ PXRD analysis on the kinetic effect of PVP-K90 and PVCap on methane hydrate dissociation below ice point.FUEL,286,9. |
| MLA | Zhou, Xuebing,et al."In situ PXRD analysis on the kinetic effect of PVP-K90 and PVCap on methane hydrate dissociation below ice point".FUEL 286(2021):9. |
入库方式： OAI收割
来源：广州能源研究所
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