合成低级脂肪胺的负载型镍催化剂研究

研究了负载型镍催化剂催化下低级脂肪醇的脱氢胺化。通过研究影响催化剂性能的因素,确定适宜的制备条件,使所开发催化剂的性能达到了同类催化剂的国际先进水平。同时,研究了催化剂在制备和使用过程中,物性指标与性能指标的变化情况。     

THE COMPETITIVE PERMEATION OF COBALT AND NICKEL WITH SUPPORTED LIQUID MEMBRANES

In this paper, the competitive permeation of cobalt and nickel from nitrate solutions through supported liquid membranes was studied, in which contained 2-ethylhexyIphosphonic acid mono-2-cthylhexyl ester (HEHEHP) dissolved in kerosene as a mobile carrier. The permeation rate equations were derived taking into account the aqueous film diffusion of metal ions towards and out of the membrane and the membrane diffusion of HEHEHP and its metal complexes. The mass transfer coefficients of metal ions and metal-HEHEHP complexes were also determined using the permeation cell. It was found that the calculated permeation rates were in good agreement with the measured ones.     

乙烯装置与干气回收联合的再生系统探讨

介绍了乙烯装置与干气回收装置联合的情况下再生系统工艺流程,探讨了某再生系统优化前后的工艺流程设计,认为优化后的再生流程在安全性、可操作性和能耗等方面均有较大改善,为同类装置的工程设计提供借鉴。     

处理方法对碳纳米管织构性质及负载Pd-Pt催化剂萘加氢反应活性的影响

采用酸性KMnO4溶液、浓HNO3／H2SO4混酸、中性H202溶液和高温熔融KOH分别对碳纳米管（CNTs）进行了氧化处理，用氮气物理吸附、高分辨透射电镜（HRTEM）、傅立叶变换红外光谱（FTIR）、化学滴定和X射线衍射（XRD）对处理后CNTs的表面性质和体相结构进行了研究，考察了其处理前后的变化及其负载的Pd—Pt催化剂在萘加氢为四氢萘反应过程中的的活性。结果表明：KMnO4和混酸处理后，CNTs表面上形成了大量含氧基团，H2O2处理时含氧基团量生成量则较少，而KOH处理后生成的含氧基团量很少，但CNTs比表面积显著提高，同时也使其体相结构破坏。CNTs负载的Pd-Pt催化剂上萘加氢反应的活性随表面羧基类基团含量的升高而增加。     

CATALYTIC PRODUCTION OF ELEMENTAL SULFUR FROM THE THERMAL DECOMPOSITION OF H2S IN THE PRESENCE OF CO2

The feasibility of using a cobalt-molybdenum (Co-Mo) sulfide catalyst that was prepared from a commercial Co-Mo oxide catalyst for the production of elemental sulfur from hydrogen sulfide (H₂S) and carbon dioxide (CO₂) in a packed bed catalytic reactor was studied. It was demonstrated that the desired sulfide catalyst could be prepared by first reducing, then sulphiding the corresponding oxide. The results showed that the prepared catalyst was capable of producing elemental sulfur from the thermal decomposition of H₂S in the presence of CO₂ over a temperature range of 465-700°C and at atmospheric pressure. A specific rate coefficient was calculated as well as the Arrhenius parameters for the non-equilibrated reaction. The H₂S decomposition reaction was found to be a second order reaction and have an activation energy of 114.4kJ/mol(27.3kcal/mol).     

反应时间对VCD法制备多壁碳纳米管产率和形貌的影响

以甲烷为碳源气，以氢气为载气和还原气，以自制纳米NiO/SiO2气凝胶为催化剂，探讨了气相化学沉积法制备碳纳米管工艺过程中，反应时间对产物产率和形貌的影响。实验结果表明，随反应时间的延长，碳纳米管的产率不断提高，一定时间后增长趋于平缓，TEM图象表明碳纳米管的长径比也随之增加。