...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Intercalation Inhibits the Surface Hydration of Sodium Montmorillonite: Experiments and Density Functional Theory Simulation
【24h】

Intercalation Inhibits the Surface Hydration of Sodium Montmorillonite: Experiments and Density Functional Theory Simulation

机译：嵌入抑制蒙脱石钠的表面水合：实验和密度泛函理论模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to use water-based drilling fluids to substitute for oil-based drilling fluids in the drilling industry, one of the main challenges is the inhibiting the surface hydration of clay to further develop oil and gas resources. In this work, low-molecular weight branched polyethylenimine (BPEI) and hexamethylenediamine (HMDA) as inhibitors were used to investigate the inhibitory mechanism of surface hydration on sodium montmorillonite (Mt) using isothermal adsorption, X-ray diffraction (XRD), thermogravimetric analysis (TGA), low field nuclear magnetic resonance (LF-NMR), the Brunner-Emmet-Teller (BET) technique, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), and density functional theory (DFT) simulations. The XRD results confirmed that HMDA and BPEI could decrease the d001 values of hydrated Mt from 1.91 to 1.32 and 1.39 nm, respectively. These results verified that the interlamellar space of Mt-HMDA and Mt-BPEI may contain one layer of water molecules. TGA and LF-NMR analyses further confirmed that HMDA can restrict Mt to one-layer hydration, while BPEI can completely inhibit the interlayer surface hydration of Mt. The HMDA and BPEI could displace the exchangeable cations in the interlamellar space of Mt, whereas as the number of primary amine groups increased, both the displaced exchangeable cations and the inhibition performance increased. The DFT simulation results showed that, as the number of primary amine groups increased, both the adsorption energy of the inhibitor on the Mt surface and the inhibition performance increased. Finally, the mechanism of the inhibition of the clay surface hydration through intercalation adsorption was put forward. The theory and method can be helpful in designing inhibitors that completely inhibit the surface hydration of clay.
机译：为了利用水性钻井液替代钻井工业中的油钻井液，主要挑战之一是抑制粘土的表面水合，进一步发展油气资源。在该工作中，使用低分子量支化聚乙烯亚胺（BPEI）和六亚甲基二胺（HMDA）作为抑制剂，用于使用等温吸附，X射线衍射（XRD），热重分析（TGA），低现场核磁共振（LF-NMR），Brunner-Emmet-externer（Bet）技术，扫描电子显微镜（SEM），透射电子显微镜（TEM），能量分散X射线（EDX），和密度泛函理论（DFT）模拟。 XRD结果证实，HMDA和BPEI可以分别将水合MT的D001值降低至1.32和1.39nm。这些结果证实了MT-HMDA和MT-BPEI的层状空间可含有一层水分子。 TGA和LF-NMR分析进一步证实HMDA可以限制MT至单层水合，而BPEI可以完全抑制MT的中间层表面水合。HMDA和BPEI可以使MT的内部空间中的可交换阳离子置换为伯胺群的数量增加，流离失所的可交换阳离子和抑制性能都增加。 DFT仿真结果表明，随着伯胺基团的数量增加，抑制剂对MT表面的吸附能和抑制性能增加。最后，提出了通过插层吸附抑制粘土表面水合的机制。理论和方法可以有助于设计完全抑制粘土表面水合的抑制剂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号