期刊
ENERGY & FUELS
卷 28, 期 8, 页码 5389-5395出版社
AMER CHEMICAL SOC
DOI: 10.1021/ef500684r
关键词
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资金
- Shell Global Solutions International B.V., Netherlands
- Natural Science Foundation of China [21036008, 21276275, 21206193, 20976194, 20806091]
- Program for New Century Excellent Talents in the University of China [NCET-12-0970]
- Science Foundation of China University of Petroleum, Beijing [KYJJ2012-03-23, KYJJ2012-03-25]
Composite ionic liquid (CIL) prepared from triethylamine hydrochloride, anhydrous aluminum(III) chloride, and cuprous chloride is a new catalyst for isobutane alkylation. This composite ionic liquid alkylation (CILA) technology yields an alkylate with favorable product distribution. CILA is a promising replacement for sulfuric acid and hydrofluoric acid alkylation technologies. However, some solids are formed during alkylation, and solid amount increases with time on stream. In a number of separation steps, the used CIL was divided into liquid and solid. Nuclear magnetic resonance, X-ray diffraction, X-ray photoelectron spectroscopy, and elemental analyses were applied to characterize these fractions. The content of acid-soluble oil (ASO) in solid was also investigated. The results showed that the solid was mainly cuprous chloride and contained about 1 wt % ASO. The loss of aluminum chloride and detachment of CuCl as a form of solid from CIL resulted in the decrease of CIL acidity and product selectivity.
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