Yue Li,Huan Ren,Daolai Sun,Xinqiang Zhao,Satoshi Sato
Liquid-phase catalytic hydrodeoxygenation of 1,2-decanediol (1,2-DDO) to form 1-decanol was performed over various non-noble metal-loaded acidic catalysts, and Cu loaded on amorphous SiO 2 -Al 2 O 3 exhibited a high catalytic activity for the formation of 1-decanol. A high 1-decanol selectivity of 84.7% with a complete 1,2-DDO conversion was obtained within only 15 min over the Cu/SiO 2 -Al 2 O 3 at 250 °C under 10 MPa H 2 pressure. The temperature at 250 °C and the H 2 pressure higher than 3 MPa were conducive to the efficient production of 1-decanol from 1,2-DDO. In contrast to the previously reported noble metal catalysts, Cu/SiO 2 -Al 2 O 3 required a relatively high reaction temperature, while an extremely high 1-decanol productivity of 78 mmol g cat −1 h −1 could be achieved. Meanwhile, the hydrodeoxygenation of 1,2-decanediol over Cu/SiO 2 -Al 2 O 3 proceeded via a reaction mechanism in which decanal was formed as the intermediate. In addition, the Cu/SiO 2 -Al 2 O 3 catalyst was reusable at least five times without serious deactivation.
Lin Li,Jia Chen,Jiawei Liu,Zhongzheng Xu,Yining Wu,Mingwei Zhao,Guang Zhao,Caili Dai
A large amount of oil film remains on the rock surface after conventional oil displacement methods. Developing novel surfactant to achieve efficient oil film peeling, and unveiling the oil-solid interaction mechanism behind is of great significance. Herein, a novel anionic surfactant 1,2-decanediol dihydroxypropyl sulfonates ( D -diHS), which was composed of one hydrophobic tail and two branched hydrophilic heads containing hydroxyl groups and sulfonate groups was synthesized via a feasible two-step reaction. The experimental results showed that D -diHS could alter the wettability of rock surface from oleophilic to strong hydrophilic, with the water contact angle reducing substantially from 100.8° to 17.8°. Compared with traditional surfactants , D -diHS exhibited superior oil film peeling performance with excellent salinity tolerance (oil film reduction rate >74.3 % at 6 wt% salinity). Based on the nano-mechanical experimental results, the reduced adhesion caused by improved hydrophilicity and the produced electrostatic repulsion between the oil film and rock surface played crucial roles in the oil film peeling. The novel anionic surfactant D -diHS proposed in this work was designed from the perspective of oil-solid interfacial interaction control, exhibiting great application potential in efficient residual oil development.
危险品化学品经营许可证（带存储）