Applications of high-gravity technologies in gas purifications: A review

The traditional gas purification techniques such as wet gas desulfurization, with their advantages of large-scale implementation and maturity, have still been widely used. However, the main drawback of these techniques is the low transfer efficiency, which normally needs towers as tall as tens of meters to remove the pollutants. Therefore, new technologies which could enhance the mass transfer efficiency and are less energy-intensive are highly desirable. As a process intensification technology, high-gravity technology, which is carried out in a rotating packed bed(RPB), has recently demonstrated great potential for industrial applications due to its high mass transfer efficiency, energy-saving, and smaller volume. This consequently provides higher efficiency in toxic gas removal, and can significantly reduce the investment and operation costs. In this review, the mechanism,characteristics, recent developments, and the industry applications of high-gravity technologies in gas purifications, such as hydrogen sulfide, nitrogen oxide, carbon dioxide, sulfur dioxide, volatile organic compounds and nanoparticle removal are discussed, most of the demonstration projects and practical application examples in gas purification come from China. The perspective and prospective of this technology in gas purification and other fields are also briefly discussed.     

浅析海底管道节点IMPP涂层的施工

IMPP（注射成型聚丙烯）涂层是一种新型海管节点涂层,其耐高温、耐磨损、防腐性能好、施工自动化程度高、施工质量容易控制。这种涂层解决了高温海管节点防腐的难题,在中东等地应用广泛,但国内没有应用先例。本文介绍了某国外海管项目施工中的相关经验。 IMPP涂层的施工包括表面处理、 FBE（环氧粉末）喷涂、 CMPP（化学改性聚丙烯）喷涂和 PP（聚丙烯）注入等工序,使用的主要设备有循环磨料喷砂设备、中频加热设备、流化床、粉末喷枪、辐射加热设备、 PP注入设备等。     

Synthesis and properties of a phosphate ester as curing agent in an epoxy resin system

Phosphate ester compounds display good flame retardancy effect in epoxy resin systems. In this paper, several novel phosphate esters, used as curing agents for epoxy resins, were synthesized based on P₂O₅, phosphoric acid, and different types of alcohol. The structures of phosphate esters were characterized by ³¹P nuclear magnetic resonance (³¹P NMR). Then, a series of flame retardant epoxy composites were prepared by curing the epoxy resins (E-44) with the phosphate esters. The flame retardancy and thermal degradation behaviors of flame retardant epoxy composites were investigated by cone calorimeter test (CCT) and thermogravimetric analysis (TGA), respectively. The results of CCT indicated that phosphate esters can significantly decrease heat release rate, total heat release (THR), and smoke production rate. The sample cured by butyl phosphate ester from phosphorus pentoxide, phosphoric acid and butanol showed the best flame retardant performance among all samples. The TGA results showed that phosphate esters could enhance char residues of flame retardant epoxy composites when compared with those of a composite using T31 as a curing agent at high temperature. It may be concluded that good flame retardant properties of flame retardant epoxy composites are related to the formation of a protective phosphorus-rich char layer. These phosphate esters have a good future on flame retardant epoxy composites.     

生物质秸秆墙材—新型墙材的发展方向

秸秆是第二大“森林”资源，将秸秆制备成墙材，既找到大量秸秆资源化的出路，也填补了墙材即将面临短缺的难题。综述了生物质秸秆墙材的研究进展，讨论了目前秸秆墙材研究与应用中存在的问题，探讨了秸秆墙材将来研究的趋势。     

Radiation synthesis of polysilane-modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

Functionalized graphene oxide (named GO-Si) was synthesized with graphene oxide and triethoxyvinylsilane (TEVS) using tetrahydrofuran solution by γ-ray irradiation. TEVS was successfully covered onto GO sheets, and the polysilane content on GO-Si was increased upon increasing the absorbed dose. The structures of GO-Si were verified by atomic force microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The resultant GO-Si was dispersed into α,ω-dihydroxypolydimethylsiloxane to prepare room temperature vulcanized silicone rubber composites (named SR/GO-Si) by solution casting. The dispersion of GO-Si was more uniform than that of GO. Compared to that of pure SR, the thermal conductivity of SR/GO-Si-1.95 composites was increased 1.5-fold, and its tensile strength and elongation at break increased 78.6 and 71.4%, respectively. It was expected that SR/GO-Si would have potential application as the thermal interface material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47776.     

Effect of grain size on the electrical performance of BaZr0.1Ce0.7Y0.1Yb0.1O3-δ solid electrolytes with addition of NiO

In order to clarify the effect of grain size on the electrical performance of BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ (BZCYYb) solid electrolytes with addition of NiO, microcrystalline (~1.5?µm) and ultrafine-grained (~280?nm) BZCYYb electrolytes (with 1?wt% NiO) were fabricated by the conventional and two-step sintering method, respectively. The results show that compared with microcrystalline electrolytes, the ultrafine-grained electrolytes have similar grain-interior conductivities, but much lower grain-boundary conductivities, illustrating that the grain boundary is not conducive for ionic transport. As a result, the electrical conductivity of microcrystalline electrolytes (1.9?×?10^?2 S?cm^?1 at 600?°C in wet air) is higher than that of ultrafine-grained electrolytes (1.1?×?10^?2 S?cm^?1 at 600?°C in wet air). In addition, the OCV (open-circuit voltage) values of electrolyte-supported single cells show that the undesired electronic conduction exists in the electrolytes due to the BaY₂NiO₅ impurity formed by the reaction of NiO and BZCYYb. The ultrafine-grained electrolytes show lower OCV values than that of microcrystalline ones, due to the prolonged electronic transport paths. Therefore, large-grained or grain boundary-free microstructure are necessary for improving the electrical performance of BZCYYb electrolytes.     

Synthesis of copper hexacyanoferrate nanoflake as a cathode for sodium-ion batteries

Prussian blue analogues are considered as the promising cathodes for sodium-ion batteries. Since the electrochemical properties are closely related to the morphology, the monodisperse copper hexacyanoferrate nanoflakes with highly crystalline are synthesized by a glycol-assisted coprecipitation method and a tentative synthetic mechanism is proposed to explain the formation of nanostructures. The structure and electrochemical properties are characterized by X-ray photoelectron spectroscopy, FTIR spectra and galvanostatic cycle tests, respectively. Due to the novel architecture of copper hexacyanoferrate, a high electrochemical activity is obtained, resulting a high initial coulombic efficiency of 93%, a capacity retention of 73% at 1?C after 300 cycles and 51?mAh?g^?1 is maintained at high rate of 15?C at 25?°C.     

碳四烯烃制丙烯催化剂及其工业应用

研究碳四烯烃催化裂解制丙烯BOC-1催化剂的放大制备及其工业应用,详细介绍催化剂放大制备后实验室小试和工业应用评价结果。BOC-1催化剂在工业生产装置中运行和再生性能良好,丙烯单程收率28.5%,碳四烯烃转化率82.1%,催化剂使用周期17天,各项性能指标均超过洛阳炼化宏力化工有限责任公司的工业催化剂水平,适合进一步推广使用。建立由烯烃催化裂解、吸收稳定、气分、MTBE醚化和烷烃分离5个单元组成的碳四烯烃资源综合利用工艺流程,并使用VMGSim流程模拟软件进行模拟计算。结果表明,采用新工艺流程,碳四烯烃综合利用率99.3%,聚合级丙烯收率35.19%。     

天然橡胶中蛋白质的研究进展

天然橡胶中含有很大数量的蛋白质,文章从蛋白质在天然胶乳中的生理作用,蛋白质对天然橡胶性能的影响及蛋白质脱除技术三个方面简述了天然橡胶中蛋白质的研究现状。