توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Optimization of Naphtha Steam Cracking Conditions for Production of Light Olefins by Statistical Design of Experiments
نویسنده(ها): ، ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
The effect of temperature, steam to naphtha ratio, and residence time on the yield of the major products in naphtha steam cracking has been investigated. The temperature, steam ratio, and residence time were varied in the range 1053– 1153 K, 0.5–0.9 gr\gr, and 0.15–0.4s, respectively. Based on experimental results, naphtha steam cracking was modeled by use of statistical design of experiments. Good agreement was obtained between the calculated and experimental results. The results for the successful multi–objective optimization of the naphtha steam cracking have also been reported. Performance was assessed using two quantitative descriptors: yields of ethylene and propylene. The response defined by the three most significant parameters was obtained from Box–Behnken design and the optimal parameter set was found. The superiority of the DoE method over the conventional COST (change one separate factor at a time) approach is shown by the fact that we were able to optimize three individual factors with only 13 runs.<\div>

۲Kinetic Modeling Of Naphtha Thermal Cracking
نویسنده(ها): ، ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۷
In this paper, thermal cracking of naphtha was studied. The CCD (central composite design) method was utilized and a set of experiments were designed and carried out. Based on these experiments, the cracking naphtha was studied with the operating conditions as temperature and steam ratio respectively equal to780–830ºc , 0.5–0.9 kg\kg . For this study, the model proposed consist of 27 reactions and 18 species. In the presented model there were 54 unknown parameters(activation energy and rate constant) and considering all the parameters is not simultaneously possibble. To make good agreement between simulation and experimental results, an optimizing objective function was used for the most important components. This function was defined as the sum of squares of differences between simulated results and experimental values.The effects of temperature and inlet steam to naphtha ratio on the major effeluent products were investigated. As the results show, the increase of temperature and steam ratio causes the increase of the yield of major products.<\div>

۳Experimental Investigation of Thermal Catalytic Cracking over Nanotubes Catalysts
نویسنده(ها): ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۸
The effects of temperature and Fe loading over multi wall carbon nano tube catalysts in thermal catalytic cracking of naphtha to produce light olefins have been studied in this paper. The temperature and Fe loading varied from 572–628°C and 0.34–11.66 wt.% Fe, respectively. The maximum yield of ethylene (18.46 wt.% of product) was obtained at 620ºC and 10 wt.% loading of Fe over CNTs, and the maximum yield of propylene (12.01 wt.% of product) was obtained at 628ºC and 6 wt.% of Fe loading over CNTs.<\div>
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