Production of Liquid Biofuels in a Fluid Catalytic Cracking Pilot-Plant Unit Using Waxes Produced from a Biomass-to-Liquid (BTL) Process
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- 作者：Angelos A. Lappas ; Dimitris K. Iatridis ; Iacovos A. Vasalos
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2011
- 出版时间：January 19, 2011
- 年：2011
- 卷：50
- 期：2
- 页码：531-538
- 全文大小：394K
- 年卷期：v.50,no.2(January 19, 2011)
- ISSN：1520-5045
文摘
The production of synthetic transportation fuels from lignocellulosic biomass feedstocks through a biomass-to-liquid (BTL) process based on Fischer鈭扵ropsch (F鈭扵) synthesis is today of increasingly importance. Depending on the operating conditions of the F鈭扵 process, heavy waxy hydrocarbons could be produced (waxes) with almost zero aromatics and sulfur. The purpose of this study is the investigation of a catalytic cracking process for the upgrading of these BTL waxes in order to produce high-quality biofuels. In this work, a F鈭扵 Wax with hydrocarbons up to C40 was used, while the fluid catalytic cracking (FCC) experiments were carried out in an FCC pilot-plant unit operating in a full circulation mode with continuous catalyst regeneration. Three different catalysts, cofeeding options, and various operating conditions were investigated in the pilot plant. Our results showed that the F鈭扵 Wax is very crackable and conversions in the range of 70鈭?0 wt % (on the feed) can be achieved with all catalysts tested. Catalyst type and cracking temperature also play an important role in improving the selectivity of specific FCC products. The process gives high gasoline yields with very low aromatics, low light cycle oil yields, and very low coke yields. The use of a ZSM-5 catalyst offers also significant advantages for the production of light olefins, while this catalyst strongly influences the gasoline composition.