مدل‌سازی منحنی رخنه بستر جذب ترکیبات گوگردی از جریان پروپان و بوتان با نانوجاذب زئولیتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران، ایران

2 مرکز توسعه فناوری نانو و کربن، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

در پژوهـش حاضـر، جذب ترکیبات گوگردی از جریان گاز واقعی پروپان و بوتان عسلویه به وسیله جاذب زئولیتی نوع Faujasite در دما و فشار ثابت در بستر جذب انجام شد. به منظور تعیین اثر اندازه جاذب بر مقدار جذب ترکیبات گوگردی، جاذب زئولیتی در آزمایشگاه ساخته شد. پس از مشخصه‌سازی جاذب ساخته شده  با آنالیزهای FE-SEM, ASAP و XRD سه جاذب با اندازه‎های 60، 800 و nm 2400 انتخاب گردید و میزان جذب کل ترکیبات گوگردی به وسیله پتانسیومتری اندازه‌گیری شد. زمان اشباع سه جاذب به ترتیب 150، 270 و min 350 برای گاز پروپان و 100، 160 و min 250 برای گاز بوتان بود. منحنی رخنه برای هر کدام از گازهای خوراک با جاذب مورد استفاده رسم شد و با مدل‌های (Bed Depth ServiceTime (BDST و Yoon-Nelson مدل‌سازی گردید تا اثر اندازه جاذب، نوع گاز خوراک و میزان ترکیبات گوگردی گاز خوراک بر پارامترهای هر دو مدل تعیین گردد. میزان خطا در تطبیق نتایج آزمایشگاهی با مدل‌سازی از حدود 1% برای مدل BDST، گاز پروپان جاذب nm 800 تا حدود17% برای گاز پروپان، مدل Yoon-Nelson، جاذب nm 2400 متغیر بود. پس از مقایسه نتایج حاصل از مدل‌سازی منحنی‌های رخنه مشاهده گردید که با کاهش اندازه جاذب شاخص ظرفیت جذب در مدل BDST افزایش یافته در حالی که ثابت تناسب مدل کاهش می‌یابد. در مدل Yoon-Nelson نیز با کاهش اندازه ذرات زمان رسیدن به 50% منحنی رخنه افزایش یافته و همچنین ثابت سرعت مدل کاهش می‌یابد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Breakthrough Curve Modeling for Adsorption of Sulfur Compounds from Propane and Butane Streams Using Nano Zeolite

نویسندگان [English]

  • abdollah khosravanian 1
  • Flor Shayegh 2
  • Mohammad Soltanieh 1
  • Saeed Soltanali 2
  • Alimorad Rashidi 2
1 Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
2 Nano Technology Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
چکیده [English]

In this research, the adsorption of sulfur compounds from propane and butane streams (real gas from Assaluyeh) using faujasite-type zeolite in constant pressure and temperature was studied. Zeolite NaY was synthesized in order to specify the effect of NaY size on adsorption of sulfur compounds. The synthesized samples were characterized by XRD, FE-SEM and BET analyses then three different sizes of NaY zeolite (60nm, 800nm, 2400nm) were selected to specify the effect of the particle size on the sulfur compound’s removal performance. The outlet gas streams were characterized using a potentiometric method (UOP212). Breakthrough curves were plotted for each stream; moreover, the breakthrough curves were modeled using BDST (bed depth service time) model and Yoon-Nelson model in order to determine the effect of adsorbent’s size, type of inlet gas and the amount of sulfur compounds on the parameters of Yoon-Nelson and BDST models. After making a comparison between the results from breakthrough modeling, it was concluded that for BDST model, decreasing the size of NaY zeolite increased the adsorption capacity index while the proportionally constant model was being decreased; however, in Yoon-Nelson model, decreasing the size of NaY zeolite increased time to %50 of breakthrough curve and decreased the proportionally constant model.
 

کلیدواژه‌ها [English]

  • NaY Zeolite
  • Nano
  • Sulfur Compounds Adsorption
  • Breakthrough Modeling
  • Propane and Butane
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