توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Pre–feasibility study for construction of a unit for styrene extraction from pyrolysis gasoline in the south parts of Iran
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۴
(PG) is presented in this paper. The location of unit was considered to be in south parts of Iran and the study was done based on the present conditions. Pyrolysis gasoline is a byproduct of olefin plants which contains C5–C10 hydrocarbons but its main compounds are Benzene, Toluene, Styrene and Xylenes. The technical problem in separation of styrene from pyrolysis gasoline is the boiling points of compounds, which are very close to each other especially for styrene and o–xylene. So, separation of these two compounds by traditional processes such as distillation needs huge equipment which makes the process uneconomical. Extractive distillation is one of the useful methods for separation of styrene from pyrolysis gasoline. According to National Petrochemical Company (NPC) reports, there are some deficits for styrene in Iran so construction of new styrene plants seems necessary. Extraction of styrene from pyrolysis gasoline is a suitable process to compensate the styrene demand in Iran. Also, by this process we make a valuable product (styrene) from a lower value material (PG).<\div>

۲Modeling of non–adiabatic reactors, used in Di–Methyl Ether (DME) synthesis
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۷
Commercial processes for Di–Methyl Ether (DME) production are based on methanol dehydration over acidic catalysts in adiabatic fixed bed reactors. As the synthesis reaction is exothermic, to increase the equilibrium conversion, nonadiabatic shell–tube type reactors can be used. In this paper modeling of adiabatic and non–adiabatic reactors, using three cooling mediums in shell side of reactor in cocurrent and countercurrent flow regime, was performed. The cooling mediums used in this research are water in its boiling point (saturated water), methanol gas feed to reactor which is preheated in shell side and a special type of oil. Adiabatic reactor modeling shows good compatibility between our results and the data received from Haldor Topsoe Company. The results of non–adiabatic reactor modeling show that more conversion can be achieved in lower length of reactor although, in some cases, the maximum temperature in the tube side of reactor is more than the deactivation temperature of catalyst.<\div>
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