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

[1]. U. S. Energy Information Administration “The transition to ultra- low-sulfur diesel fuel: effects on prices and supply”, SR/OIAF/ 200101.##

[2]. پورصابری ط.، حسنی سعدی م.، ترکستانی ک. و کریمی زند ا.، "استفاده از نانوذرات مغناطیسی عامل دار شده با مایعات یونى جهت حذف ترکیباتگوگردی آروماتیک بنزین" مجله پژوهش نفت، شماره 70، صفحه 84-77، سال 1391.##

[3]. Largeteau D., Ross J., Laborde M., and Wisdom L., “Challenges and opportunities of 10 ppm sulphur gasoline: part 2," Petroleum Technology Quarterly, Vol. 17, 2012.##

[4]. Su B. M., Zhang S., and Zhang Z. C., “Structural elucidation of thiophene interaction with ionic liquids by multinuclear NMR spectroscopy,” The Journal of Physical Chemistry B, Vol. 108, pp. 19510-19517, 2004.##

[5]. Carrado K., Kim J., Song C., Castagnola N., Marshall C., and Schwartz M., “HDS and deep HDS activity of CoMoS-mesostructured clay catalysts,” Catalysis today, Vol. 116, pp. 478-484, 2006.##

[6]. Jiang M. and Ng F. T., “Adsorption of benzothiophene on Y zeolites investigated by infrared spectroscopy and flow calorimetry,” Catalysis today, Vol. 116, pp. 530-536, 2006.##

[7]. Bashkova S., Bagreev A., and Bandosz T. J., “Adsorption of methyl mercaptan on activated carbons,” Environmental science & technology, Vol. 36, pp. 2777-2782, 2002.##

[8]. Thomas M., Toth E., LeComte F., Meyer P., and Ambrosino J. L., “Method of purifying a natural gas by mercaptan adsorption,’ ed: Google Patents, 2008.##

[9]. Sang S., Liu Z., Tian P., Liu Z., Qu L., and Zhang Y., “Synthesis of small crystals zeolite NaY,” Materials Letters, Vol. 60, pp. 1131-1133, 2006.##

[10]. Weber G., Benoit F., Bellat J. P., Paulin C., Mougin P., and Thomas M., “Selective adsorption of ethyl mercaptan on NaX zeolite,” Microporous and Mesoporous Materials, Vol. 109, pp. 184-192, 2008.##

[11]. Tian F., Shen Q., Fu Z., Wu Y., and Jia C., “Enhanced adsorption desulfurization performance over hierarchically structured zeolite Y,” Fuel Processing Technology, Vol. 128, pp. 176-182, 2014.##

[12]. Seyedeyn-Azad F., Ghandy A. H., Aghamiri S. F., and Khaleghian-Moghadam R., “Removal of mercaptans from light oil cuts using Cu (II)–Y type Zeolite,” Fuel Processing Technology, Vol. 90, pp. 1459-1463, 2009.##

[13]. Barzamini R., Falamaki C., and Mahmoudi R., “Adsorption of ethyl, iso-propyl, n-butyl and iso-butyl mercaptans on AgX zeolite: Equilibrium and kinetic study. Fuel,” Vol. 130: pp. 46-53, 2014..##

[14]. Kizito S., Wu Sh., Wandera S. M., Guo L. and Dong R., “Evaluation of ammonium adsorption in biochar-fixed beds for treatment of anaerobically digested swine slurry: Experimental optimization and modeling,” Science of The Total Environment,. 563: pp. 1095-1104, 2016.##

[15]. Afroze S., Sen T. K., and Ang H., “Adsorption performance of continuous fixed bed column for the removal of methylene blue (MB) dye using Eucalyptus sheathiana bark biomass,” Research on Chemical Intermediates, Vol. 42, pp. 2343-2364, 2016.##

[16]. Ryzhikov A., Hulea V., Tichit D., Leroi C., Anglerot D., Coq B., and Trens Ph., “Methyl mercaptan and carbonyl sulfide traces removal through adsorption and catalysis on zeolites and layered double hydroxides,” Applied Catalysis A: General, Vol. 397, Issues 1–2, pp. 218-22430 Apr. 2011.##

[17]. Patiño Y., Díaz E., and Ordóñez S., “Pre-concentration of nalidixic acid through adsorption–desorption cycles: Adsorbent selection and modeling,” Chemical Engineering Journal, Vol. 283, pp. 486-494, 2016.##

[18]. Mastropietro T., Drioli E. and Poerio T., “Low temperature synthesis of nanosized NaY zeolite crystals from organic-free gel by using supported seeds,” RSC Advances, Vol. 4, pp. 21951-21957, 2014.##

[19]. Eskandari A., Jahangiri M. and Anbia M., “Effect of particle size of nax zeolite on adsorption of CO2/CH4,” IJE Transactions A: Basics Vol. 29, No. 1, pp. 1-7, Janu. 2016.##

[20]. Kim K. J. and Ahn H. G., “The effect of pore structure of zeolite on the adsorption of VOCs and their desorption properties by microwave heating,” Microporous and Mesoporous Materials, Vol. 152, pp. 78-83, 2012.##

[21]. Galhotra P., Navea J. G., Larsen S. C. and Grassian V. H., “Carbon dioxide (C 16 O 2 and C 18 O 2) adsorption in zeolite Y materials: effect of cation, adsorbed water and particle size,” Energy & Environmental Science, Vol. 2, pp. 401-409, 2009.##

[22]. Kundu S. and Gupta A., “As (III) removal from aqueous medium in fixed bed using iron oxide-coated cement (IOCC): experimental and modeling studies,” Chemical Engineering Journal, Vol. 129, pp. 123-131, 2007.##

[23]. Chica A., Strohmaier K. G. and Iglesia E., “Effects of zeolite structure and aluminum content on thiophene adsorption, desorption, and surface reactions,” Applied Catalysis B: Environmental, Vol. 60, pp. 223-232, 2005.##