摘要:

Intrinsic kinetic data for propylene hydrogenation over aCoMof Al2O3catalyst were measured in a plug-flow integral reactor at atmospheric pressure in the ranges of temperature and propylene concentration similar to industrial processes. The parameters of several Langmuir-Hinshelwood kinetic models derived from postulated corresponding reaction mechanisms were estimated by DFP variable measurement method. It was shown in view of physical meaning, variance and residue analysis that the data could be simulated satisfactorily by power law model and the models derived from the adsorption of only either molecular hydrogen or dissociated hydrogen. A kinetic optimization method which combined diffusion-reaction model, kinetic data, pore-size distribution and tortuosity factor was proposed in this paper to calculate the intraparticle reaction dead region and intraparticle concentration profiles. The method was used to treat hydrogenation reaction and the model values of tortuosity factor were justified by single pellet string

ISSN:0884-3759    

DOI:10.1080/08843759608947600

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The article describes the preparation of adsorbents from shale phenols, their properties and applications. Highly effective microporous adsorbents have been produced, with high sorption indices. New adsorbents can be useful for the purposed of air purification, maintaining the required temperatures in food storage facilities, as well as treating gaseous and liquid wastes from nuclear plant

ISSN:0884-3759    

DOI:10.1080/08843759608947601

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Using Mossbauer and X-ray Photoelectron Spectroscopy ( XPS) techniques the sulfur forms in solid products obtained at different reaction were analyzed. The results show that: during supercritical desulfurization the pyritic sulfur is removed as following process: FeS2-FeS+ Fe1-xS, the transformation amounts and the value of x are dependent on reaction conditions, especially on temperature. The conversion of pyrite is very little at 275° C. Pyrrhotite ( Fe1-xS) is Fes1.101at 275° C and Fe1.085at 450° C. Among the organic sulfur groups PhSH. Ph2S and thiolane are easily removed; Ph2SO is more difficult to be removed, its removal may be realized by increasing temperature and adding some water into ethanol; thiophene is most difficult to be removed, its removal needs high reaction temperature

ISSN:0884-3759    

DOI:10.1080/08843759608947602

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Selective conversion of dimethyl ether to lower olefins is a process of commercial significance. Lower olefins are intermediates in the conversion of dimethyl ether to higher hydrocarbons. Conversion of dimethyl ether to hydrocarbons has significant advantages over its counterpart methanol conversion process in the areas of heat duties, hydrocarbon selectivities, product yield, and reactor size

ISSN:0884-3759    

DOI:10.1080/08843759608947603

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The process feasibility analysis on the liquid phase methanol synthesis (LPMeOH) process was performed in an entrained slurry reactor system. In this three phase mini-pilot plant system, finely powdered catalyst is slurried in the inert oil phase and this catalyst-oil slurry is continuously recirculated through the entrained reactor, where it is contacted with the cocurrent flow of syngas to form the product methanol

ISSN:0884-3759    

DOI:10.1080/08843759608947604

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The effect of various operating conditions including the catalyst loading in slurry, on the productivity of methanol in an agitated slurry reactor were studied. The modeling of the mechanically agitated slurry reactor was performed with the aid of the reaction rate expression and the gas-liquid mass transfer correlation that were developed, to predict the rate of methanol production for any inlet condition

ISSN:0884-3759    

DOI:10.1080/08843759608947605

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The depleting supplies of non-renewable petroleum reserves, as well as their escalating costs, have directed a great deal of research toward the synthesis of hydrocarbons from coal. Synthesis of methanol from coal-derived synthesis gas is a well established technology, and methanol has been used as a feedstock for the synthesis of gasoline range hydrocarbons and olefins commercially. However, an efficient hydrocarbon synthesis process has been developed at the University of Akron using dimethyl ether as the starting feedstock. This UA/ EPRI' s DTH ( Dimethyl Ether to Hydrocarbons) process has significant advantages over its counterpart methanol conversion process in the areas of heat duties, hydrocarbon selectivities, product yield, and reactor size

ISSN:0884-3759    

DOI:10.1080/08843759608947606

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The role of methanol produced in-situ in the liquid phase methanol synthesis process has been experimentally examined. The catalyst crystallite size is found to be more stable when the produced water and methanol are consistently removed from the catalyst active sites. The experimental evidence shows that in-situ produced water is not the only culprit for the catalyst crystallite size growth, rather, methanol is also responsible for contributing to crystallite growth and therefore catalyst deactivation

ISSN:0884-3759    

DOI:10.1080/08843759608947607

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor