Effect of operation parameters on adsorption of thiophene from benzene over CeY sorbent
-
摘要: 通过固定床吸附实验考察了吸附剂的粒径、空速与浓度及床层温度等操作参数对苯中噻吩吸附的影响。结果表明,上述因素分别通过改变内、外扩散过程的传质阻力以及其物理吸附行为来影响噻吩的脱除。最佳的参数是,吸附剂粒径为0.2~0.3 mm,空速为0.85 h-1,床层温度为室温。在此条件下,CeY吸附剂能将噻吩浓度为500 mg/L苯溶液中的噻吩完全脱除,其噻吩的穿透时间和吸附量可达400 min和4.61 mg/g以上。Abstract: The effect of operation parameters, such as particle size of the CeY sorbent, space velocity, and concentration of the solution and temperature of the fixed bed, on the adsorption of thiophene from benzene was investigated. The results show that this effect can be ascribed to the change of the inner and external diffusion process of the mass transfer resistance and the adsorption type, which are affected by those operation parameters respectively. The suitable operation parameters were the particle sizes of 0.2~0.3 mm, space velocity of the solution of 0.85 h-1. At the conditions of room temperature and atmospheric pressure, CeY sorbent can entirely remove the thiophene from benzene with the breakthrough time and adsorption capacity of thiophene of above 400 min and 4.61 mg/g in the benzene containing thiophene 500 mg/L, respectively.
-
Key words:
- CeY sorbent /
- thiophene /
- benzene /
- adsorption /
- operation parameter
-
陈艳珍. 吸附法脱除焦化苯中噻吩的研究[D]. 太原: 太原理工大学, 2008. (CHEN Yan-zhen. Research on adsorption of thiophene in cooking benzol[D]. Taiyuan: Taiyuan University of Technology, 2008.) 何建平, 李辉. 炼焦化学产品回收技术[M]. 北京: 化学工业出版社, 2006: 221-226. (HE Jian-ping, LI Hui. Coking chemical products recovery technology[M]. Beijing: Chemical Industry Press, 2006: 221-226.) 程时富, 安莹, 司晓娟, 付贤磊, 高国华. Ti-TWW分子筛催化叔丁基过氧化氢氧化脱硫[J]. 燃料化学学报, 2011, 39(10): 771-775. (HE Shi-fu, AN Ying, SI Xiao-juan, FU Xian-lei, GAO Guo-hua. Oxidative desulfurization of diesel oil over Ti-MWW catalyst with TBHP as oxidant[J]. Journal of Fuel Chemistry and Technology, 2011, 39(10): 771-775.) KONG L, LI G, WANG X, WANG Y. Thiophene oxidative over titanium silicate using hydrogen peroxide[J]. Chin J Catal, 2004, 25(2): 89-90. KONG L, LI G, WANG X, WU B. Oxidative desulfurization of organic sulfur in gasoline over Ag/TS-1[J]. Energy Fuels, 2006, 20(3): 896-902. SHIRAISHI Y, HIRRAI T, KOMASAWA I. Oxidative desulfurization process for light oil using titanium silicate molecular sieve catalysts[J]. J Chem Eng Jpn, 2002, 35(1/2): 1305-1310. HULEA V, FAJULA F, BOUSQUET J. Mild oxidative desulfurization with H2O2 over Ti-containing molecular sieves-A very efficient method for removing aromatic sulfur compounds from fuels[J]. J Catal, 2001, 198(1): 179-186. 廖俊杰, 王文博, 王海堂, 靳庆麦, 常丽萍. 焦化苯中噻吩类硫化物脱除的研究[J]. 现代化工, 2009, 29(S1): 219-221. (LIAO Jun-jie, WANG Wen-bo, WANG Hai-tang, JIN Qing-mai, CHANG Li-ping. Study on removing thiophene-like sulfides from cooking benzene[J]. Modern Chemical Industry, 2009, 29(S1): 219-221.) SONG C S. An overview of new approaches to deep desulfurization for ultra-clean gasoline, diesel fuel and jet fuel[J]. Catal Today, 2003, 86: 211-263. YANG R T. HERN A NDEZ-MALDONADO A J, Yang F Y. Desulfurization of transportataion fuels with zeolites under ambient conditions[J]. Science, 2003, 301(5629): 79-80. HERNÁNDEZ-MALDONADO A J, YANG R T. Desulfurization of diesel fuels by adsorption via SymbolpA@-complexation with vapor-phase exchanged Cu(I)-Y zeolites[J]. J Am Chem Soc, 2004, 126(4): 992-993. LIN L G, ZHANG Y Z, ZHANG H Y, LU F W. Adsorption and solvent desorption behavior of ion-exchanged modified Y zeolites for sulfur removal and for fuel cell applications[J]. J Colloid Interface Sci, 2011, 360(2): 753-759. LIAO J J, WANG W B, ZHANG Y J, XIE Y Y, CHANG L P, BAO W R. Adsorptive removal of thiophene from benzene by NaY zeolite ion exchanged with Ce(IV)[J]. Sep Sci Technol, 2012, 47(13): 1880-1885. HASHIMOTO K, MATZUO K, KOMINAMI H, KERA Y. Cerium oxides incorporated into zeolite cavities and their reactivity[J]. J Chem Soc, Faraday Trans, 1997, 20: 3729-3732. LIAO J J, ZHANG Y J, WANG W B, Li X L, CHANG L P. Detection of thiophene and CS2 in coking benzene using GC-FPD[C]. 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM 2011). 2011: 44-47.
点击查看大图
计量
- 文章访问数: 1244
- HTML全文浏览量: 21
- PDF下载量: 562
- 被引次数: 0