全低变催化剂的失活原因及对策

针对全低变催化剂的失活情况进行分析,并提出解决办法。     

Clinsulf-DO硫回收工艺

通过某厂 18- 30工程 Clinsulf- DO装置的引进过程 ,介绍了 Clinsulf- DO硫回收工艺的原理和特点     

浅谈新车型涂装生产准备通过性分析

以奇瑞公司某涂装线为例,对新车型在该涂装线进行生产试制前的非标及机械化设备的通过性进行分析介绍。     

煤制天然气淮南煤气化技术的选择

主要介绍了淮南煤和煤灰的特性,通过煤气化技术比较,选择煤制天然气方案中适合淮南煤的气化技术。     

Reduction of NOx over Fe/ZSM-5 catalysts: mechanistic causes of activity differences between alkanes

Fe/ZSM-5 catalysts prepared by sublimation of FeCl₃ onto H/ZSM-5 catalyze the selective reduction of NO_x by hydrocarbons to N₂. The order of the relative rates and N₂ yields obtained with different alkanes reveals a non-trivial chemistry. The maximum yield is lower for propane than for n-butane but about the same for n- and iso-butane. However, at temperatures below this maximum, the N₂ yield is higher for propane and n-butane than for iso-butane. Deposits are formed on the catalyst that contain N atoms in a low-oxidation state which are able to react with NO₂ to form N₂. TPO and FTIR results show that the amount and also the character of the deposits depend on the nature of alkanes. The change of the oxidation state of nitrogen from a high value in NO or NO₂ to a lower value in nitrile and amino groups of the deposit is rationalized by applying mechanistic concepts of organic chemistry, including the Beckmann rearrangement and fragmentation. FTIR spectra and the observed oxygen- and nitrogen-containing compounds by GC-MS are potential clues to the reaction mechanism.     

庚醛催化加氢制庚醇新型催化剂的性能研究

研制了一种新的庚醛催化加氢催化剂,并用于进行庚醛催化加氢合成庚醇试验,以活性炭为载体时,最佳反应条件为:反应温度为250℃,压力2.0MPa,空速0.5h-1,H2与C7H14O的体积比为1000。通过100mL单管放大试验及500h的稳定运转,庚醛转化率达90%以上,庚醇的选择性达到91%。     

A Comprehensive Study on Gasification of Petroleum Wastes Based on a Mathematical Model

Gasification is a thermochemical process that produces useful and environmentally friendly by-products. Here the effects of various parameters such as equivalence ratio, pressure, and steam gasifying on the gasification process of waste lubricant oil are investigated based on Gibbs free energy minimization approach. The model is validated by reported data and found to be in good agreement. Various gasification performance parameters such as cold gas efficiency, carbon conversion efficiency, gasification temperature, pressure, and heating value of produced gas were determined based on a parametric study. The use of CaO catalyst has also been investigated for the production of hydrogen-rich gas with in situ CO₂ capture in steam gasification of waste oil. The results indicate that an appropriate steam/fuel ratio and more catalyst are favorable for getting a higher H₂ ratio and a lower CO₂ output.     

0.6Mt/a连续重整装置的设计和标定

介绍了齐鲁石油化工公司 0 .6Mt/a连续重整装置的设计和满负荷标定情况以及装置尚需解决的问题。该装置采用法国石油研究院的连续重整第二代再生技术 ,与以往的引进方式不同 ,这次引进只付专利费 ,不购买与专利有关的工艺包 ,全部技术方面工作由国内负责。该装置设计在充分消化吸收引进技术的基础上 ,开发了并列式连续再生控制系统 ,改进了再生系统关键设备及催化剂粉尘收集系统的设计及采用了国内多项先进技术。运行和标定结果表明 ,设计达到国际先进水平     

基于压缩机-支架系统的异常噪声研究

针对某乘用车发动机转速在1 573 r/min,压缩机开启时车内噪声异常的问题,对样车进行试验分析与诊断,对压缩机-支架系统进行仿真分析,提出改进方案并验证改进效果。利用LMS声振信号采集系统采集振动噪声数据,采用频谱分析、阶次追踪等方法,并结合压缩机-支架系统模态仿真结果,确定车内异常噪声是压缩机轴频21阶与压缩机-支架系统3阶模态频率接近发生共振造成的。通过优化支架结构来提高压缩机-支架系统3阶模态频率以此来避免共振,并换装橡胶驱动盘缓和压缩机输入扭矩波动。将改进结构进行整车试验,结果表明：匀速工况空调开启时问题转速下,车内噪声降低了2.5 dB(A);匀加速工况空调开启时发动机转速1 500~1 650 r/min区间,车内噪声无峰值,其余转速空调开启时改进前/后车内噪声基本不变,噪声波动趋势平缓。     

洗浴行业空调系统设计

通过分析洗浴中心各主要区域的温度、新风与排风的要求，阐述了主机、新风置与排风量的确定原则。达到了保证室内舒适温度和室内空气品质以及节能目的。