自产催化剂在辽河化肥厂大型装置中的使用

通过辽河化工总厂催化剂分厂所产催化剂在辽河化肥厂引进凯洛格型合成氨装置的使用实践,为合成氨装置催化剂使用提供了借鉴。     

自产催化剂在辽河化肥厂大型装置中的使用(续)

通过辽河化工总厂催化剂分厂所产催化剂在辽河化肥厂引进凯洛格型合成氨装置的使用实践,为合成氨装置催化剂使用提供了借鉴。     

基于催化剂的硫酸装置优化运行策略

介绍了优化催化剂选择和使用方案对硫酸装置运行的积极影响。通过更换高活性催化剂可以提高硫酸装置进气浓度,解决床层压降快速升高的问题;装填防尘催化剂能起到降低床层压降、减少电耗,延长装置运行周期的目的;通过在末段使用低温高活性催化剂可以缩短开车时间,减少燃料消耗;使用高活性催化剂还可以减少尾气吸收装置的碱消耗,几种方案联合使用会取得更好的效果。     

RU小型提升管催化剂评价装置与工业RFCC装置结果的关联性

通过不同阶段随机抽样实验比较，使用工业重油催化裂化（RFCC）装置进料和催化剂（平衡剂），采用相同的反应和再生条件，在RU小型提升管催化剂评价装置上做比较实验。结果发现，RU小型提升管催化剂评价装置既能反映原料油性质差别对产品分布的影响，又能反映催化剂的使用性能。两套装置的产品分布规律相同，说明RU小型提升管催化剂评价装置与工业RFCC装置的关联性较强，在其上可预测催化剂实际使用效果，对新产品开发和催化剂放大应用有重要指导意义。     

钛系催化剂在PET工业化生产中的应用

在10 kt/a间歇式及1 kt/a连续式PET生产装置上使用钛系催化剂,在200kt/a连续式PET生产装置上使用钛-锑复合催化剂进行PET工业化生产,从反应时间、温度、产品质量等方面与使用锑系催化剂的生产状况进行对比.结果表明:与使用锑系催化剂相比,在间歇式装置上,使用钛系催化剂时终缩聚反应时间延长30%,且产物色...     

AEB-1烷基转移催化剂在稀乙烯制乙苯装置上的应用

简述了原催化剂在使用过程中存在的问题和对生产的影响,介绍了AEB-1烷基转移催化剂在稀乙烯制乙苯装置上的使用情况以及AEB-1催化剂与原烷基转移反应催化剂在生产应用上的区别,并将AEB-1烷基转移催化剂在稀乙烯制乙苯装置与纯乙烯制乙苯装置上的使用情况进行了对比。因操作条件的改变,烷基转移进料泵改造后耗电量下降,热载体加热炉F101热负荷降低,对热载体的结碳影响下降。实践证明,AEB-1烷基转移催化剂能够在稀乙烯制乙苯装置上很好的应用,并能降低生产成本,降低装置能耗,提高经济效益。     

低变催化剂B206使用情况总结

低变催化剂Ｂ２０６使用情况总结中原化肥厂李继向低变催化剂在合成氨装置中占有举足轻重的地位，南化公司的Ｂ２０６催化剂是首次在大型合成氨装置中使用，因此，对Ｂ２０６低变催化剂的使用情况进行总结，不仅有利于今后的生产及工艺管理，也有利于提高大型合成氨装置催...     

DQC-401催化剂在双环管工艺聚丙烯装置的应用

使用DQC-401催化剂在海南炼化双环管聚丙烯装置进行试生产,与DQ-Ⅲ-2催化剂进行对比,结果表明：DQC-401催化剂适合在双环管聚丙烯装置上应用。     

FF-14蜡油加氢处理催化剂在金陵分公司的工业应用

金陵分公司通过使用抚顺石油化工研究院(FRIPP)开发的FF-14催化剂,将柴油加氢精制装置作为蜡油加氢精制装置运行,并摸索了缓和条件下该催化剂的使用效果.结合催化剂装填、硫化和开工情况,将FF-14与装置过去使用过的精制催化剂HC-K、FH-5的使用效果进行了分析对比.     

MTBE装置催化剂使用周期缩短的原因及对策

针对MTBE装置催化剂使用周期缩短,结合装置原料以及工艺操作,对催化剂失活的原因进行分析,并对延长催化剂使用周期可采取的措施进行探讨。     

新一代FZC渣油加氢处理催化剂的工业应用

介绍新一代FZC系列渣油加氢处理催化剂的工业应用。新一代FZC系列渣油加氢处理催化剂性能显著提高,催化剂体系具有高的容金属能力和抗结焦能力,活性和稳定性好,能够有效保证装置长周期稳定运行,催化剂整体加氢性能显著提升。工业应用表明,新一代FZC系列渣油加氢处理催化剂能够很好满足用户要求。     

用于茂金属催化剂的载体及其研究进展

概括了近年来茂金属催化剂负载化的研究进展,包括新型载体的研制、载体的负载特性、负载化对催化性能以及聚合产物性能的影响,强调指出,应着重关注催化剂负载后的微观环境及聚合物的相态,以便利于满足茂金属催化剂在现有工业装置中应用的适应性。     

AB-96型乙苯催化剂的试生产和工业应用

AB-96型苯与乙烯气相烷基化制乙苯分子筛催化剂成功地进行了试生产和工业应用,其性能完全达到了国外同类催化剂的水平,给工厂带来了显著的经济效益。     

Supported Metallocene Catalysts

Single-site olefin polymerization catalysts have been researched extensively and are now achieving wide acceptance in the polyolefin industry. To achieve commercial significance in the majority of today's commercial processes, these soluble catalysts must be immobilized on a carrier. The challenges of supporting metallocene catalysts have been addressed in many creative ways and are the topic of this paper.     

A PROCEDURE FOR EVALUATION OF COMMERCIAL FCC CATALYSTS

Based on the correlations between laboratory units and commercial plants, a procedure has been developed to guide commercial FCC (Fluid Catalytic Cracking) catalysts selection. Examining the operability of catalyst mixtures during catalyst transition period is emphasized. The testing procedure is simple and reliable. A commercially available catalyst and the catalyst currently in use have been compared to demonstrate the applicability of this procedure. The commercial testing has confirmed the reliability of laboratory results. The use of the catalyst evaluated led to a 30% saving in catalyst cost.     

A PROCEDURE FOR EVALUATION OF COMMERCIAL FCC CATALYSTS

Based on the correlations between laboratory units and commercial plants, a procedure has been developed to guide commercial FCC (Fluid Catalytic Cracking) catalysts selection. Examining the operability of catalyst mixtures during catalyst transition period is emphasized. The testing procedure is simple and reliable. A commercially available catalyst and the catalyst currently in use have been compared to demonstrate the applicability of this procedure. The commercial testing has confirmed the reliability of laboratory results. The use of the catalyst evaluated led to a 30% saving in catalyst cost.     

分子筛催化合成乙苯工业化技术进展

综述了国内外分子筛催化乙苯工业化技术进展，包括Mobil—Badger，Lummus—UOP，L／U／U，CDTech，Dow化学及中国乙苯工艺，指出乙苯工艺开发的方向是开发液相低苯烯比的新型催化剂和由此带来的能量利用问题。采用稀乙烯、乙烷或乙醇作烷基化剂是原料开发的重点。     

Evaluation of catalytic pyrolysis of cassava rhizome by principal component analysis

Rhizome of cassava plants (Manihot esculenta Crantz) was catalytically pyrolysed at 500 °C using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) method in order to investigate the relative effect of various catalysts on pyrolysis products. Selected catalysts expected to affect bio-oil properties were used in this study. These include zeolites and related materials (ZSM-5, Al-MCM-41 and Al-MSU-F type), metal oxides (zinc oxide, zirconium (IV) oxide, cerium (IV) oxide and copper chromite) catalysts, proprietary commercial catalysts (Criterion-534 and alumina-stabilised ceria-MI-575) and natural catalysts (slate, char and ashes derived from char and biomass). The pyrolysis product distributions were monitored using models in principal components analysis (PCA) technique. The results showed that the zeolites, proprietary commercial catalysts, copper chromite and biomass-derived ash were selective to the reduction of most oxygenated lignin derivatives. The use of ZSM-5, Criterion-534 and Al-MSU-F catalysts enhanced the formation of aromatic hydrocarbons and phenols. No single catalyst was found to selectively reduce all carbonyl products. Instead, most of the carbonyl compounds containing hydroxyl group were reduced by zeolite and related materials, proprietary catalysts and copper chromite. The PCA model for carboxylic acids showed that zeolite ZSM-5 and Al-MSU-F tend to produce significant amounts of acetic and formic acids.     

Influence of zirconia raw materials on the development of DeNOx monolithic catalysts

Pd-zirconia-based monolithic catalysts were prepared with various commercial zirconia raw materials and a natural magnesium silicate binder, sepiolite, for the selective catalytic reduction (SCR) of NO with CH₄ in oxygen excess. The different textural properties, metastable tetragonal zirconia phase stability, surface acidity, Pd dispersion and catalytic properties of these monoliths were compared to select the most suitable structured catalyst for NO_x control in natural gas-fired power plants. The influence of operating temperature in the two reactions, NO reduction and CH₄ combustion, with the monolithic catalysts was determined. A 0.4 wt.% Pd-zirconia catalyst, manufactured from a sulphated zirconium hydroxide raw material, was selected as the most appropriate in the reaction under study, reaching a maximum NO conversion at 400 °C.     

CO2 reforming of methane to syngas: I: evaluation of hydrotalcite clay-derived catalysts

Several important chemicals can potentially be manufactured from natural gas (mostly methane) by first converting it to syngas (CO+H₂). The high cost of converting methane to syngas currently limits the large scale commercial use of syngas to produce methanol. This study focuses on the CO₂/steam reforming of methane to produce inexpensive syngas using nickel and magnesium containing hydrotalcite clay-derived catalysts. Several of these catalysts were prepared and evaluated. The results are compared with commercial Ni/Al₂O₃ or Ni/MgAl₂O₄ catalysts. At 815°C and 300 psi pressure, the fresh clay-derived catalysts showed identical performance as the commercial catalysts. However, under more severe operating conditions, the clay-derived catalysts exhibited superior activity and stability. Aging studies clearly showed that the clay-derived catalysts are more stable and coke resistant than commercial catalysts.