期刊
CHEMICAL ENGINEERING RESEARCH & DESIGN
卷 115, 期 -, 页码 182-194出版社
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.cherd.2016.09.031
关键词
Biorefinery; Gasification; Methanol; DME; Platform chemical; Light olefins
资金
- Chalmers Energy Initiative by Swedish Government
- Wilhelm och Martina Lundgrens Vetenskapsfond
- Universidad de Sevilla [PPI2014-II.5]
This work investigates and compares the thermodynamic performance of alternative platform chemicals for the production of light olefins (i.e., ethylene, propylene, and mixed butylenes) via gasification of lignocellulosic biomass (forest residues). Two concepts based on the same general process layout are considered: (i) via methanol synthesis and methanol to -olefins (MTO) synthesis; (ii) via direct dimethyl ether (DME) synthesis and DME-to-olefins (DTO) synthesis. The work is based on process models established in Aspen Plus to obtain mass and energy balances. Heat recovery targets for integration of a steam network for combined heat and power production are investigated using pinch analysis tools. The different process alternatives are compared in terms of energy efficiency (eta(en)). Additionally, to identify key process differences, the cold gas efficiency (eta(cg,i)) and carbon conversion (C-conv,C-i) from biomass feedstock to various intermediate products along the process value chain are compared. The results show that light olefins could be produced with an energy efficiency of approximately 52-54% (higher heating value (HHV) basis) using methanol and DME as platform chemicals. The two investigated concepts had similar cold gas efficiency along the process value chain and overall electricity balance. Accordingly, no significant thermodynamic difference could be identified for the two investigated cases. One interesting feature that is identified is that the same amount of the renewable carbon in the feedstock is lost, mainly as CO2, regardless of whether the methanol or DME route is adopted. The difference is where in the process value chain most of the CO2 is formed and removed. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据