A novel microwave-assisted methanol-to-hydrocarbons process with a structured ZSM-5/SiC foam catalyst: Proof-of-concept and environmental impacts
A novel microwave-assisted methanol-to-hydrocarbons process with a structured ZSM-5/SiC foam catalyst: Proof-of-concept and environmental impacts
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DOI：
10.1016/j.ces.2022.117669
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发表时间：
2022-04
影响因子：
4.7
通讯作者：
Xiaoxia Ou;M. Tomatis;Yongyong Lan;Yilai Jiao;Yipei Chen;Zheng Guo;Xin Gao;Tao Wu;Chunfei Wu
中科院分区：
文献类型：
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作者：
Xiaoxia Ou;M. Tomatis;Yongyong Lan;Yilai Jiao;Yipei Chen;Zheng Guo;Xin Gao;Tao Wu;Chunfei Wu
本研究提出了一种新型的微波辐射和结构化沸石/碳化硅泡沫催化剂相结合的方法，以改善甲醇制烃(MTH)工艺及其环境可持续性。因此，在不同反应温度(4 0 0~5 5 0℃)和不同空速(8和12 h−1)下，研究了ZSM 5/碳化硅泡沫塑料，并与传统的ZSM 5颗粒进行了比较。与ZSM-5颗粒(分别为40%和6-9%的−)相比，ZSM-5/SiC泡沫具有更高的选择性(∼95%)，特别是丙烯(在400℃和8小时的∼1时−为40%)，这是由于强化了传质和换热。通过生命周期评价，对微波辅助的结构化催化剂和颗粒MTH工艺的环境可持续性进行了评价，并与常规加热工艺进行了比较。结果表明，与相同催化剂的常规加热工艺相比，采用结构化催化剂的微波法可将丙烯生产对环境的影响降低22-30%。
This study presents a novel combination of microwave irradiation and structured zeolite/SiC foam catalyst to improve the methanol-to-hydrocarbons (MTH) process as well as its environmental sustainability. Accordingly, ZSM-5/SiC foam was studied under microwave irradiation at various reaction temperatures (400–550 °C) and space velocities (8 and 12 h−1) and compared to conventional ZSM-5 pellets. ZSM-5/SiC foam promoted higher selectivity towards C1−C5 hydrocarbons (∼95%) and particularly propylene (∼40% at 400 °C and 8 h−1) compared to ZSM-5 pellets (∼40% and 6–9%, respectively) due to the enhanced mass and heat transfers. The microwave-assisted MTH process with both the structured catalyst and pellets was also assessed on the environmental sustainability via life cycle assessment in comparison with the conventionally-heat process with the structured catalyst. The results showed that the microwave-based process with the structured catalyst could reduce the environmental impacts of propylene production by 22–30% compared to the conventionally-heated process with the same catalyst.