High Efficient Decomposition of Environment-Polluting Gases in a Specific Reaction System

在特定反应体系中高效分解环境污染气体

• 批准号: 10650772
• 负责人: SHIMIZU Yasuhiro
• 金额: $ 2.24万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650772/
• 关键词: Micrwave-Induced Ar Plasma; Trichlorotrifluoroethane; Decomposition; SiC; LaィイD20.8ィエD2SrィイD20.2ィエD2MnOィイD23ィエD2

Our previous studies have revealed that Ar plasma could be generated from SiC ceramics under atmospheric pressure upon irradiation of microwave and this microwave-induced (MI) Ar plasma offered several advantages in decomposing trichlorotrifluoroethane (CFC113). The present study was directed to improving the MI Ar plasma processing.When LaィイD20.8ィエD2SrィイD20.2ィエD2MnOィイD23ィエD2 was used as an alternative trigger for MI Ar plasma generation, similar decomposition behavior of CFC113 could be obtained. Thus, we could confirm again that CFC113 could be decomposed more satisfactorily by MI Ar plasma, accompanied by low energy consumption and low concentration of partial decomposition products, than by its direct thermal decomposition or simple catalytic decomposition with LaィイD20.8ィエD2SrィイD20.2ィエD2MnOィイD23ィエD2.Cooperative decomposition of CFC113 was also conducted by the MI Ar plasma generated from SiC ceramics and LaィイD20.8ィエD2SrィイD20.2ィエD2MnOィイD23ィエD2 catalyst placed in the downstream of th … More e plasma zone. In comparison with the decomposition without the catalyst, the concentration of CClィイD22ィエD2FィイD22ィエD2 as a partial decomposition product in the effluent gas was approximately doubled in the microwave power range of 60-80 W, but the total concentration of partial decomposition products was decreased satisfactory above the microwave power of 100 W. Thus, it was revealed that CFC113 could be decomposed more efficiently by the cooperative decomposition. However, the decomposition efficiency decreased gradually with time, probably due to the degradation of the catalyst by HCl and/or HF produced from CFC113 in the plasma. It was suggested that the long-term stability of this reaction system could be improved by setting the catalyst (heated at 550℃) in the downstream of the plasma zone and then by removing both HCl and HF form the effluent gas before reaching the catalyst zone.The shape of the plasma generated from SiC ceramics was a streak, and therefore it is suggested that poor radical and/or ion bombardment to CFC113 is responsible for unsatisfactory decomposition efficiency of the plasma alone. In the next step, therefore, the effect of the successive double plasma reactors, namely, the usefulness of an additional plasma reactor for decomposing partial decomposition products produced by the first plasma reactor has been investigated. As a result, further improvement in decomposition efficiency could be realized.Based on the results obtained, future investigations should be directed to the development of the ceramic form of a plasma trigger with three-dimensional open-micropore structure. The generation of Ar plasma inside the micropores makes low-cost, high efficient and continuous decomposition of environment-polluting gases possible under atmospheric pressure. Less

我们先前的研究表明，在微波炉照射下，在大气压力下，SIC陶瓷可以产生AR血浆，而微波炉诱导的（MI）AR血浆在分解三氯氟甲烷（CFC113）中提供了几个优势。本研究旨在改善MI AR血浆加工。当LAI D20.8 D20.8 D2SRHI D20.2 D2MNOI D23 D2被用作MI AR等离子体产生的替代触发器时，可以获得类似的CFC113分解行为。 That, we could confirm again that CFC113 could be decomposed more satisfactory by MI Ar plasma, accomplished by low energy consumption and low concentration of partial decomposition products, than by its direct thermal decomposition or simple catalytic decomposition with Lai D20.8 D2Srhii D20.2 D2MnOi D23 D2.Cooperative decomposition of CFC113 was also conducted by the MI Ar由SIC陶瓷和LAI D20.8 D2SRHI D20.2 D2MNOI D23 D2 D2催化剂产生的等离子体放置在更多E等离子体区域的下游。与没有催化剂的分解相比，CCLI D22 D2F D22 D2的浓度在有效气体中作为部分分解产物的浓度在60-80 w的微波功率范围内大约增加一倍，而部分分解产物的总浓度则降低了100 w的微波电源，以降低了可满足的能力。分解。但是，分解效率随时间逐渐降低，这可能是由于血浆中CFC113产生的HCl和/或HF催化剂的降解。有人建议，可以通过在血浆区域的下游中设置催化剂（在550℃中加热），然后通过在达到催化剂区域之前脱离hcl和HF形成有效气体，从而提高该反应系统的长期稳定性。从而使SIC Ceramics的不良构成的速度是一种不良的爆炸性，因此，它是一种有效的气体。仅等离子体的分解效率不令人满意。因此，在下一步中，已经研究了成功的双等离子体反应器成功的双等离子体反应器的作用，即已经研究了额外的等离子反应器对第一个血浆反应器产生的分解部分分解产物的有用性。结果，可以实现分解效率的进一步提高。根据获得的结果，未来的投资应针对具有三维开放式微孔结构的等离子体触发的陶瓷形式的开发。微孔内部的AR血浆的产生使在大气压下可能会使环境污染气体的低成本，高效且连续分解。较少的

项目成果

Yasuhiro Shimizu: "Decomposition of Trichloroethylene by Microwave-Induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure" Denki Kagaku. Vol.66 No.10. 1018-1025 (1998)

Yasuhiro Shimizu：“大气压下 SiC 陶瓷产生的微波诱导 Ar 等离子体分解三氯乙烯”电气化学。

Y. Shimizu, Y. Akai, T. Hyodo, Y. Takao and M. Egashira: "Decomposition of Trichlorotrifluoroethane by Microwave-Induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure"J. Electrochem. Soc.. 146(8). 3052-3057 (1999)

Y. Shimizu、Y. Akai、T. Hyodo、Y. Takao 和 M. Egashira：“常压下 SiC 陶瓷产生的微波诱导 Ar 等离子体分解三氯三氟乙烷”J。

Yasuhiro Shimizu: "Decomposition of Trichloroethylene by Microwave-Induced Ar Plasma Genarated from SiC Ceramics under Atmospheric Pressure"Denki kagaku (presently Electrochemistry). Vol.66 No.10. 1018-1025 (1999)

Yasuhiro Shimizu：“在大气压下由 SiC 陶瓷产生的微波诱导 Ar 等离子体分解三氯乙烯”电气化学（现为电化学）。

Yasuhiro Shimizu: "Decomposition of Toxic Halogenated Hydrocarbons by Microwave-Induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure" Proc.of Italy-Japan Seminar on Functional Ceramic Materials (Setp.29,1998,Tokyo,Japan). 58-61 (1998)

Yasuhiro Shimizu：“大气压下 SiC 陶瓷产生的微波诱导 Ar 等离子体分解有毒卤代烃”意大利-日本功能陶瓷材料研讨会论文集（Setp.29，1998 年，日本东京）。

Y. Shimizu, K. Ogawa, Y. Takao and M. Egashira: "Decomposition of Trichloroethylene by Microwave-Induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure"Denki Kagaku (presently Electrochemistry). 66(10). 1018-1025 (1998)

Y. Shimizu、K. Okawa、Y. Takao 和 M. Egashira：“在大气压下由 SiC 陶瓷产生的微波诱导 Ar 等离子体分解三氯乙烯”Denki Kagaku（现为电化学）。