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Intensification of CO₂ Capture by Monoethanolamine Solution in a Rotating Packed Bed Reactor Equipped with High Frequency Ultrasonic Transducers | ||
| Journal of Heat and Mass Transfer Research | ||
| مقاله 3، دوره 9، شماره 2 - شماره پیاپی 18، بهمن 2022، صفحه 121-128 اصل مقاله (502.28 K) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2023.27119.1379 | ||
| نویسندگان | ||
| Mahdi Hefzi Lotfabadi؛ Masoud Shirzadi Ahoudashti؛ Mahdieh Abolhasani* | ||
| Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran | ||
| تاریخ دریافت: 18 اردیبهشت 1401، تاریخ بازنگری: 18 دی 1401، تاریخ پذیرش: 19 دی 1401 | ||
| چکیده | ||
| In this study, a carbon dioxide (CO2) absorption process in a typical rotating packed bed (RPB) reactor equipped with blade packing and under a high frequency ultrasonic field has been studied. The utilized ultrasonic transducers were ultrasonic atomizer humidifiers with a frequency of 1.7 MHz. This reactor takes advantage of both controllable high gravitational force and induced effects of high frequency ultrasound, simultaneously, in a small volume. The overall volumetric gas side mass transfer coefficient (KGa) with and without ultrasound was investigated. The effects of different parameters such as rotational speed (400-1600 rpm), liquid flow rate (20- 120 L/h), monoethanolamine (MEA) concentration (1- 4 mol/L), gas flow rate (2500- 4000 L/h), and CO2 concentration (1- 4 vol%) were investigated in the absence and presence of ultrasound. The obtained results showed that the removal efficiency increased with increasing gas and liquid flow rates, and rotational speed, as well as MEA concentration. With increasing CO2 concentration, absorption efficiency decreased. The average arithmetic value of the relative volumetric gas-side mass transfer coefficient was enhanced 11.4% under the ultrasonic field. Moreover, the average CO2 removal efficiency was enhanced from 27.4 % in the absence of ultrasound to 29.8% in the presence of ultrasound. Therefore, high frequency ultrasound can enhance CO2 absorption, even in high efficiency equipment like RPBs. | ||
| کلیدواژه‌ها | ||
| RPB reactor؛ Blade packings؛ High frequency ultrasonic waves؛ CO2 absorption؛ Gas-side mass transfer coefficient | ||
| عنوان مقاله [English] | ||
| تشدید جذب CO2 توسط محلول مونو اتانول آمین در یک راکتور بستر پر شده چرخان مجهز به مبدل های فراصوت فرکانس بالا | ||
| چکیده [English] | ||
| در این مطالعه، فرآیند جذب دی‌اکسید کربن (CO2) در یک راکتور بستر پر شده چرخان (RPB) مجهز به پکینگ تیغه‌ای و تحت میدان فرا صوت فرکانس بالا مورد بررسی قرار گرفته است. مبدل‌های فرا صوت مورد استفاده، از نوع مرطوب کننده فراصوت با فرکانس 1/7 مگاهرتز بودند. این نوع راکتور از نیروی گرانشی بالای قابل کنترل و اثرات القایی امواج فراصوت با فرکانس بالا به طور همزمان در حجم کم بهره می برد. ضریب انتقال جرم حجمی کلی سمت گاز (KGa) با و بدون فرا صوت مورد بررسی قرار گرفت. اثر متغیرهای مختلف مانند سرعت چرخش ( rpm1600-400)، سرعت جریان مایع (L/h 20-120)، غلظت مونواتانول امین (MEA) (1-4 mol/L)، سرعت جریان گاز (L/h 2500-4000) و غلظت CO2 (4-1 درصد حجمی) در غیاب و در حضور امواج فرا صوت بررسی شد. نتایج به‌دست‌آمده نشان داد که با افزایش دبی گاز و مایع، سرعت چرخش و همچنین غلظت MEA، بازده حذف افزایش می‌یابد. با افزایش غلظت CO2، بازده جذب کاهش یافت. میانگین حسابی ضریب انتقال جرم نسبی حجمی سمت گاز در میدان فرا صوت 11/4 درصد افزایش یافت. علاوه بر این، متوسط بازده حذف CO2 از 27/4٪ در غیاب فراصوت به 29/8٪ در حضور فراصوت افزایش یافت. بنابراین، فرا صوت با فرکانس بالا می‌تواند جذب CO2 را حتی در تجهیزات با بازده بالا مانند RPB ها افزایش دهد. | ||
| کلیدواژه‌ها [English] | ||
| راکتور RPB, پکینگ تیغه‌ای, امواج فرا صوت فرکانس بالا, جذب CO2, ضریب انتقال جرم سمت گاز | ||
| مراجع | ||
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