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Process feasibility and techno-economic analysis of CO2 from coal-fired flue gas coupled green hydrogen to olefins
- Low-Carbon Chemistry and Chemical Engineering Vol. 51, Issue 1, Pages: 132-140(2026)
- 作者机构：
太原理工大学 化学与化工学院，山西 太原 030024
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250093
CLC： TQ426;TQ649.4Received：09 March 2025，
Revised：2025-04-09，
Published：25 January 2026
- 稿件说明：
移动端阅览
李傲,吴华帅,张效胜等.燃煤烟道气中CO2耦合绿氢制烯烃工艺可行性和技术经济性分析[J].低碳化学与化工,2026,51(1):132-140.
LI Ao,WU Huashuai,ZHANG Xiaosheng,et al.Process feasibility and techno-economic analysis of CO2 from coal-fired flue gas coupled green hydrogen to olefins[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(1):132-140.
李傲,吴华帅,张效胜等.燃煤烟道气中CO2耦合绿氢制烯烃工艺可行性和技术经济性分析[J].低碳化学与化工,2026,51(1):132-140. DOI： 10.12434/j.issn.2097-2547.20250093.
LI Ao,WU Huashuai,ZHANG Xiaosheng,et al.Process feasibility and techno-economic analysis of CO2 from coal-fired flue gas coupled green hydrogen to olefins[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(1):132-140. DOI： 10.12434/j.issn.2097-2547.20250093.
摘要
随着能源结构转型和“双碳”战略推进，CO
2
加氢制烯烃工艺成为碳减排和碳利用的重要途径之一。尽管CO
2
加氢制烯烃催化剂的实验研究已较为成熟，但其在工业应用方面仍处于起步阶段。借助模拟手段进行工艺分析是实现其工业化的有效途径之一。基于CO
2
加氢制烯烃催化剂，按照70 × 10
4
t/a烯烃产能建立了燃煤烟道气中CO
2
耦合绿氢制烯烃工艺（简称“耦合工艺”），该工艺涵盖多个单元，包括碳捕集、逆水煤气变换反应和费托合成制烯烃反应，以及后续轻烃与重烃的分离过程。模拟结果表明，耦合工艺具有显著的碳减排优势，其
碳效率为99.71%，净CO
2
排放量为-1.83 t/t（生产1 t烯烃的CO
2
排放量为-1.83 t）。提高CO
2
转化率可有效降低资本投资和提高能量效率，H
2
生产成本对耦合工艺的经济可行性有重要影响。当CO
2
转化率从47%提高至79%时，耦合工艺的能量效率为40.92%，同时总资本投资可降低38.79%。当H
2
生产成本从0.367 USD/m
3
（标况）降低至0.114 USD/m
3
，耦合工艺的生产成本（指“烯烃生产成本”）可降低51.58%，最低可降至1006.1 USD/t。在相近的H
2
生产成本（0.317 USD/m
3
）下，该工艺的生产成本为2100.8 USD/t，优于文献值（3580 USD/t）。
Abstract
With the transition of the national energy structure and the advancement of “carbon peaking and carbon neutrality” strategy
CO
2
hydrogenation to olefins process has become one of the key methods for carbon emission reduction and carbon utilization. Although experimental studies on catalysts for CO
2
hydrogenation to olefins are relatively mature
their industrial application remains at a preliminary stage. Analyzing the process through simulation is one of the effective approaches to promoting their industrialization. Based on the catalysts for CO
2
hydrogenation to olefins
a coupled process for converting CO
2
from coal-fired flue gas and green H
2
to olefins (“coupling process” for short) has been established for olefin production capacity of 70 × 10
4
t/a. The process encompasses multiple units
including carbon capture
the reverse water-gas shift reaction
Fischer-Tropsch synthesis to olefins and the subsequent separation of light and heavy hydrocarbons. Simulation results indicate that the coupling process offers significant carbon reduction benefits
achieving the carbon efficiency of 99.71% and net CO
2
emission of -1.83 t/t (the CO
2
emission for production 1 t olefins is -1.83 t). Enhancing CO
2
conversion rate can effectively reduce capital investment and improve energy efficiency
while the cost of H
2
production plays a critical role in determining the economic viability of the coupled process. When the CO
2
conversion rate increases from 47% to 79%
the energy efficiency of the coupling process reaches 40.92% and the total capital investment can be reduced by 38.79%. When the cost of H
2
production decreases from 0.367 USD/m
3
(standard conditions) to 0.114 USD/m
3
the production cost (refers to “olefins production cost”) of the coupled process can be reduced by 51.58%
reaching as low as 1006.1 USD/t. At the similar H
2
production cost (0.317 USD/m
3
)
the production cost of the process is 2100.8 USD/t
which is lower than the reported value (3580 USD/t) in literature.
关键词
Keywords
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