کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6528858 | 1419838 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon dioxide dissociation in a microwave plasma reactor operating in a wide pressure range and different gas inlet configurations
ترجمه فارسی عنوان
جداسازی دی اکسید کربن در یک رآکتور پلاسمای مایکروویو که در محدوده فشار گسترده و تنظیمات ورودی گاز مختلف عمل می کند
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کلمات کلیدی
تبدیل، پلاسما، مایکروویو، تخلیه،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
چکیده انگلیسی
Microwave (MW) plasmas represent a promising solution for efficient CO2 dissociation. MW discharges are also very versatile and can be sustained at various pressure and gas flow regimes. To identify the most favorable conditions for the further scale-up of the CO2 decomposition reaction, a MW plasma reactor operating in pure CO2 in a wide pressure range (200â¯mbar-1â¯bar) is studied. Three different gas flow configurations are explored: a direct, reverse and a vortex regime. The CO2 conversion and energy efficiency drop almost linearly with increasing pressure, regardless of the gas flow regime. The results obtained in the direct flow configuration underline the importance of post-discharge cooling, as the exhaust of the MW plasma reactor in this regime expanded into the vacuum chamber without additional quenching. As a result, this system yields exhaust temperatures of up to 1000â¯K, which explains the lowest conversion (â¼3.5% at 200â¯mbar and 2% at 1â¯bar). A post-discharge cooling step is introduced for the reverse gas inlet regime and allows the highest conversion to be achieved (â¼38% at 200â¯mbar and 6.2% at 1â¯bar, with energy efficiencies of 23% and 3.7%). Finally, a tangential gas inlet is utilized in the vortex configuration to generate a swirl flow pattern. This results in the generation of a stable discharge in a broader range of CO2 flows (15-30 SLM) and the highest energy efficiencies obtained in this study (â¼25% at 300â¯mbar and â¼13% at 1â¯bar, at conversions of 21% and 12%). The experimental results are complemented with computational fluid dynamics simulations and with the analysis of the latest literature to identify the further research directions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 24, March 2018, Pages 386-397
Journal: Journal of CO2 Utilization - Volume 24, March 2018, Pages 386-397
نویسندگان
Igor Belov, Vincent Vermeiren, Sabine Paulussen, Annemie Bogaerts,