ie9b01002_si_001.pdf (139.95 kB)
Thermodynamic Fundamentals and Energy Efficiency for the Separation and Highly Valued Utilization of Light Naphtha from Fischer–Tropsch Synthesis
journal contribution
posted on 2019-05-06, 00:00 authored by Xin Gao, Yue Zhao, Wei Yuan, Suli Liu, Xingang Li, Hong Li, Sixiao Wang, Xueshan LuTo
improve the economic potential of Fischer–Tropsch (F–T)
products, the low-cost separation of linear α-olefins is a flexible
technology. However, the scarcity of thermodynamic data and high production
cost were the key R&D issues essential to commercialization. In
this article, the isobaric vapor–liquid equilibria (VLE) data
of five binary systems composed of 1-hexene, 2-hexene, 2-methylpentane,
1-octene, and 2-octene were measured and regressed by the activity
coefficient models. With the binary interaction parameters regressed
by experimental data, two separation processes for obtained α-olefins
fraction products C6 (1-hexene) and C8 (1-octene) were simulated by
comparing with a traditional sequence distillation route and a dividing
wall column (DWC) route. A practical configuration of the heat-integrated
distillation process was proposed to reduce the energy consumption
for the separation of olefins and alkanes. The energy consumption
and total annual costs (TACs) of the separation technology were estimated
and compared, which indicated that an advanced separation technology
could reduce the energy consumption and TAC of the production of α-olefins
from F–T products.