摘要
工业煤基费托合成工艺一般采用铁基催化剂-浆态床反应器的技术路线。针对该工艺中催化剂易失活、需要周期性置换的问题,本文构建了一种Matlab-Aspen Plus集成模型,创新性地将催化剂失活、置换的动态过程与费托合成稳态工艺模拟进行了耦合。以产能为80×10^(4)t/a的费托合成系统为例,分析了催化剂动态置换条件对关键性能指标每吨C_(3^(+))有效气耗和催化剂消耗的影响,并得出了经济性最优的置换条件,即每132h置换20%的催化剂,此时C_(3^(+))有效气耗为5449m^(3)/t(标准状况),C_(3^(+))催化剂消耗为1.65kg/t。该模型对费托合成装置的工艺设计、运行预测及实际的催化剂置换操作具有一定的指导意义,同时也为存在催化剂失活与置换操作的工艺系统建模提供了一种思路。
In industrial coal-based Fischer-Tropsch(FT)synthesis,Fe-based catalysts coupled with slurry bed reactors are widely adopted.However,catalyst deactivation necessitates periodic replacement due to inherent limitations.To address this issue,a Matlab-Aspen Plus model was constructed,which integrated the dynamic processes of catalyst deactivation and replacement with steady-state simulation of FT synthesis.Taking an FT synthesis system with an annual capacity of 80×10^(4)t/a as a case study,we analyzed the impacts of dynamic catalyst replacement conditions on key performance indicators-Specifically,specific syngas consumption and catalyst consumption per tonne of C_(3^(+))hydrocarbons.The economically optimal catalyst replacement strategy was to replace 20% catalyst every 132h.Under this condition,the specific syngas consumption and catalyst consumption were 5449m^(3)/t and 1.65kg/t,respectively.This model offers valuable guidance for the process design,performance prediction of FT synthesis units and practical catalyst replacement operations in industrial settings.Furthermore,it provides a practical methodology for simulating process systems involving catalyst deactivation and dynamic replacement,demonstrating broader applicability in similar industrial contexts.
作者
赵用明
卜亿峰
王涛
杜冰
门卓武
ZHAO Yongming;BU Yifeng;WANG Tao;DU Bing;MEN Zhuowu(National Institute of Clean and Low Carbon Energy,Beijing 102211,China)
出处
《化工进展》
北大核心
2025年第8期4536-4544,共9页
Chemical Industry and Engineering Progress
基金
国家重点研发计划(2022YFB4101400)。
关键词
费托合成
催化剂置换
失活
模拟
优化
Fischer-Tropsch(FT)synthesis
catalyst replacement
deactivation
simulation
optimization
