nts of ethylene pyrolysis in a flow reactor nall cross-section were carried out at higl (850-1, 150°C) and atmospheric pressure e nce of large amount of hydrogen. Under imental conditions, the temperature distri the direction of reactor axis were high13 Analysis of results showed that thi tem consisted of ethylene hydrogenation ation and ethane hydrogenolysis. the kinetic parameters of each forwar (e experimental results with low conver treated with“)Effective temperaturo hich had been proposed in our previoul ing such kinetic parameters obtained am constants from the literature, and consi erature profiles, the exit gas composition”: lated. These calculated values showec ments with experimental results.

View full abstract

luene was passed over zeolite catalyst al erature, the disproportionation of toluene rnethylations of toluene and xylene occur aneously. The catalyst activity for eact ad the selectivity of xylene changed wit le by coke formation. By an analysis of ex data with the assumption that distributior Ilyst activity over the bed was uniform, il that the activity ratios of fouled catalysi ne for each reaction were represented by onential functions of process time. Ant st activities of these reactions decayy In order to ascertain the validity of the for this reaction system, distributions oi tivities over the bed were calculated for 5sible types of deray. ntly it was found that the activity ratio: epresented as exponential function of pro in the early stage of decay and so the used in this experiment was reasonable e it was theoretically pointed out thai ging was easily decided by the investiga ersion-yield curve and experimental result; t the catalyst activities of these reaction; ccording to selective aging.

View full abstract

lamental method of particle growth in the ed can be obtained by the combination o fluidized bed and a spray nozzle.In thil ize distribution and particle growth rate o us coating and agglomeration are studied rate equation, which contains“coatim e coefficient”and“agglomeration growtl cient”, was introduced from the materia bed particles.Steady particle size distri tamed under the continuous operation am an diameters of many cases are calculated of various parameters (coating growtl: lent, agglomeration growth rate coefficien residence time of particles) are made clear: s are obtained by numerical calculation gital computer.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract