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The Investigation on the Catalytic Dehydrogenation of Propane to Propylene

Author: GaiXiKun
Tutor: TianYuanYu
School: Shandong University of Science and Technology
Course: Chemical processes
Keywords: Propane Propylene Catalytic dehydrogenation Catalyst Fixed - bed reactor A fluidized bed reactor
CLC: TQ221.212
Type: Master's thesis
Year: 2008
Downloads: 86
Quote: 0
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Abstract


The current global context, propylene strong demand, the general steam cracking and catalytic cracking process in the resulting product can not meet the actual needs of production. Propane dehydrogenation propylene propylene yield, relatively low investment in equipment, effective use of liquefied petroleum resources significant advantages attracted attention. First propane dehydrogenation to propylene progress discussed the pros and cons of the various technologies, details and analysis of the catalytic dehydrogenation of propane propylene process, and combined with the analysis proposed for fluidized bed The characteristics of the reactor to study the the chromium catalyst of ideas. Main research work as follows: the research in the preparation of the catalyst, the method of this paper, the active component of the catalyst load, the load sequence study results showed that such volume impregnation method such as an active ingredient than the volume of spray prepared The catalyst having better activity. The selection of the carrier and the active component of the catalyst, the choice of the γ-Al 2 O 3 for carrier, and various additives comparative experiment results show that alkaline the modification effect of the additives on the catalyst significantly improves the yield of the catalyst, selectivity and stability, contrast modification effect on the catalyst of the additives A and additives B and found that the effect of the aid A superior additives B. Modified research on rare earth elements on the catalyst, the paper examines the role of the assistant C catalyst modified, added assistant C improve the selectivity of the catalyst. In the performance of the catalyst research on the development of the catalyst in a fixed bed reactor, investigated the influence of the reaction temperature and the volume of space velocity on the catalyst performance; investigated in a fluidized bed reactor, the amount of catalyst loading, and the reaction such factors as temperature and volume airspeed to change the influence on the performance of the catalyst. 3 In order to further improve the catalyst of the catalytic dehydrogenation of propane, for the catalyst in the fluidized bed reactor serious wear problems, proposed and designed a unique wear-resistant core-shell dehydrogenation catalyst, the results show that the abrasion index of the catalyst significantly reduced . 4 according to the experimental results, for the catalytic dehydrogenation of propane catalyst industrialized Preparation of its micro-fluidized bed reaction test, the results show that: the research and development of the catalyst having a high reaction activity, the reaction temperature is 590 ℃ , volume airspeed 1000 H -1 conditions, the propylene-way conversion rate exceeds 40%, the selectivity of more than 90%, and the catalyst has good reproducibility and abrasion resistance.

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic hydrocarbons > Unsaturated lipid hydrocarbon > Monoolefins > Propylene
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