IFP连续重整新一代催化剂再生技术的改进

介绍了我国引进的采用法国石油研究院 (IFP)三代催化剂连续再生技术的重整装置 ,分析了第二、第三代技术在原有基础上的改进 ,从再生气循环回路、再生操作参数和再生器内部结构三个方面重点介绍了第三代催化剂连续再生技术的特点和优势 :使催化剂的烧焦气循环回路与氧氯化用气、焙烧气循环回路彼此分开 ,烧焦、氧氯化、焙烧的操作参数可分别得到优化 ,使氧氯化及焙烧在高氧条件下进行 ,有利于催化剂金属的再分散 ,保持催化剂的活性。     

3961连续重整催化剂性能考察

新一代高活性，高水热稳定性3961（PS－Ⅳ）型连续重整催化剂于1996年在上海石化芳烃厂400kt/a连续重整装置上首次进行工业应用试验。开工5a，催化剂跟踪分析结果表明，该剂保持了良好的物化性质和反应性能，表现为良好的比表面积稳定性和持氯能力，经过200个以上再生周期的催化剂未发现有明显的相变和金属分散度的变化。     

In situ regeneration of the Ni-based catalytic reformer of a 5 kW PEMFC system

The paper reports the results of on-site regeneration catalytic bed of the natural gas reformer in a 5 kW PEM fuel cell system. The Ni catalyst previously poisoned by sulphur from the available natural gas, could be re-activated by injection of pure water steam, following the method developed for industrial reformers using the same metal catalyst: this method was shown to be perfectly efficient, provided no natural gas was fed during the operation. Results of the tests conducted are presented and discussed in relation to published data on S-sorption on Ni surfaces.     

Syngas production via combined oxy-CO2 reforming of methane over Gd2O3-modified Ni/SiO2 catalysts in a fluidized-bed reactor

In this research, Ni/SiO₂ catalyst was modified with different amount of Gd₂O₃ and characterized with temperature-programmed desorption of CO₂ (CO₂-TPD) and NH₃ (NH₃-TPD), temperature-programmed reduction with H₂ (H₂-TPR) and X-ray diffraction (XRD). It was found that Gd₂O₃-modified Ni/SiO₂ catalysts possessed higher CO₂ adsorption and activation ability due to the formation of surface carbonate species. H₂-TPR and XRD characterizations found that the strong interaction among nickel, Gd₂O₃ and SiO₂ took place, which improved the dispersion of Ni. Gd₂O₃-modified Ni/SiO₂ catalysts exhibited higher activity and stability for the combined oxy-CO₂ reforming of methane in fluidized-bed reactor. The H₂/CO ratio in produced syngas could be controlled via controlling reaction temperature and CO₂/O₂ ratio in feed.     

焦化汽油加氢试生产重整原料的技术分析

在0.6Mt/a柴油加氢精制装置上利用焦化汽油为原料进行重整原料油的试生产，改善了焦化汽油的性质，降低了硫，氮和可导致重整催化剂中毒的金属含量及烯烃含量，提高了饱和烃的含量，生产出了合格的重整原料，该技术拓宽了重整原料来源，较好地解决了焦化汽油的出路问题。     

对我国催化重整工艺专利市场的思考

根据我国专利法的原则，在对我国催化重整和芳烃生产专利检索过程和结果进行分析的基础上，阐述了对目前我国催化重整工艺专利市场的几点看法并提出对策。     

催化重整装置的几点设计改进

以一套500kt/a规模的催化重整装置的设计为例进行分析和讨论，提出对今后催化重整装置设计的几点改进建议，包括原料的加氢预处理流程，提纯重整产氢，优化预分馏塔及稳定塔的塔盘层数，选择合适的预加氢进料换热器及甲苯塔、二甲苯塔的加压操作等。     

低压组合床重整工艺工业试验

介绍了国产500kt／a低压组合床催化重整装置首次在中国石化股份有限公司长岭分公司的工业试验情况。近两年的运转及标定结果表明试验是成功的，该技术达到了国外连续重整技术第一代与第二代之间的水平，并且投资小，适于小型固定床重整装置的改造。     

多孔纤维型重整微反应器的等效电阻网络建模

针对应用于重整制氢微反应器的复杂多孔金属纤维载体（PFS）的流速场高效分析难题,建立载体中随机微通道的等效电阻网络分析模型. 基于复杂随机纤维结构的统计网络模型,将纤维载体中三维联通的随机微通道结构及与之相连的进出口腔简化为规则的网络通道结构.借鉴基尔霍夫定律,建立纤维载体的等效电阻网络模型,并确定求解方法. 纤维载体流速场实例分析的结果表明,基于等效电阻网络模型求解的纤维载体流速场与计算流体力学(CFD)方法的结果之间的皮尔森相关系数约为98%,且求解效率约为CFD方法的2.9×10⁴倍. 研究成果为多孔纤维型重整制氢微反应器的设计制造提供了新的支撑方案.     

Stable NiO–CeO2 nanoparticles with improved carbon resistance for methane dry reforming

High surface area mixed oxide 8.7% NiO-CeO₂ nanoparticles (122 m²/g; 6–7 nm) were prepared using a reversed microemulsion method, and were tested for dry methane reforming (DRM). The catalytic activity of these nanoparticles remains stable under the severe conditions of DRM (700 °C), and they show better carbon resistance than conventional NiO-CeO₂ catalysts prepared without control of the size. The activity and selectivity of nanoparticles and reference catalyst are similar, but nanoparticles reduce the accumulation of carbon by 63% during the DRM tests, which is a key feature for this reaction. XPS and H₂-TPR suggest that the improved carbon resistance of the nanoparticles is due to the better interaction and cooperation between NiO and CeO₂ mixed phases. In nanoparticles, the participation of cerium cations in the redox processes taking place during DRM stabilizes cationic species of nickel. On the contrary, the catalyst prepared without control of the size suffers segregation of Ni during DRM reaction, and segregated Ni explains the higher catalytic formation of carbon.