Gas phase oligomerization of isobutene over acid treated kaolinite clay catalyst

被引:5
作者
Aldhayan D. [1 ]
Aouissi A. [1 ]
机构
[1] Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh
关键词
Clay catalyst; Clean gasoline; Isobutene; Oligomerization; Solid acid catalyst;
D O I
10.9767/bcrec.12.1.758.119-126
中图分类号
学科分类号
摘要
Natural Kaolin Clay was calcined and treated by sulfuric acid. The resulting solid acid catalyst was characterized by FTIR, TGA, and X-ray powder diffraction (XRD) and tested for isobutene oligomerization in a gas phase. The characterization results showed that the acid treated clay underwent chemical and structural transformations. After acid treatment, the Si/Al ratio was increased, and the crystalline raw clay became amorphous. The effects of various parameters such as reaction temperature, reaction time and contact time on isobutene oligomerization were investigated. Catalytic tests showed that isobutene oligomerization led to dimers and trimers as major products. Tetramers were obtained as byproducts. At relatively high reaction temperatures and long contact times, the conversion was enhanced while the selectivity of dimers was decreased in favor of higher oligomers. Copyright © 2017 BCREC GROUP. All rights reserved.
引用
收藏
页码:119 / 126
页数:7
相关论文
共 33 条
[11]  
Zhang J., Kanno M., Zhang J., Ohnishi R., Toriyabe K., Matsuhashi H., Kamiya Y., Preferential Oligomerization of Isobutene in a Mixture of Isobutene and 1-Butene over Sodium-Modified 12-Tungstosilicic Acid Supported on Silica, J. Mol. Catal. A, 326, pp. 107-112, (2010)
[12]  
Yoon J.W., Chang J.S., Lee H.D., Kim T.J., Jhung S.H., Trimerization of Isobutene over a Zeolite Beta Catalyst, J. Catal., 245, pp. 253-256, (2007)
[13]  
Hauge K., Bergene E., Chen D., Fredriksen G.R., Holmen A., Oligomerization of Isobutene over Solid Acid Catalysts, Catal. Today, 100, pp. 463-466, (2005)
[14]  
Yoon J.W., Jhung S.H., Choo D.H., Lee S.J., Lee K.Y., Chang J.S., Oligomerization of Isobutene over Dealuminated Y Zeolite Catalysts, Appl. Catal. A, 337, pp. 73-77, (2008)
[15]  
Mako E., Senkar Z., Kristof J., Vagvolgyi V., Surface Modification of Mechano-Chemically Activated Kaolinites by Selective Leaching, J. Colloid Interf. Sci., 294, pp. 362-370, (2006)
[16]  
Volzone C., Ortiga J., SO<sub>2</sub> Gas Adsorption by Modified Kaolin Clays: Influence of Previous Heating and Time Acid Treatments, J. Environ. Manage., 92, pp. 2590-2595, (2011)
[17]  
Kasprzhitskii A., Lazorenko G., Yavna V., Daniel Ph., DFT Theoretical and FT-IR Spectroscopic Investigations of the Plasticity of Clay Minerals Dispersions, J. Mol. Struct., 1109, pp. 97-105, (2016)
[18]  
Morsy F.A., El-Sherbiny S., Hassan M.S., Mohammed H.F., Modification and Evaluation of Egyptian Kaolinite as Pigment for Paper Coating, Powder Technol., 264, pp. 430-438, (2014)
[19]  
Bakhti A., Derriche Z., Iddou A., Larid M., A Study of the Factors Controlling the Adsorption of Cr(III) on Modified Montmorillonites, Eur. J. Soil Sci, 52, pp. 683-692, (2001)
[20]  
Frost R.L., Vassallo A.M., The Dehyddroxylation of the Kaolinite Clay Minerals using Infrared Emission Spectroscopy, Clays Clay Miner., 44, pp. 635-651, (1996)