CO2 Yakalamanın Biyokatalitik Absorpsiyon ve Ultrasonik-Destekli Desorpsiyon Performansının İncelenmesi

Sterik engelli amin sisteminin susuz çözeltisinin (2-amino-2-etil-1,3-propandiol (AEPD): 1-hekzanol) ardışık CO2 absorpsiyon-desorpsiyon performansı gaz-sıvı karıştırmalı hücre reaktöründe incelenmiştir. Farklı AEPD: 1-hekzanolkonsantrasyonları için absorpsiyon kapasitesi ve başlangıç absorpsiyon hızı 303 K ve 2 bar mutlak basınçta hesaplanmıştır.AEPD miktarının artırılması CO2 absorpsiyon kapasitesini arttırmıştır. Sabit miktarda karbonik anhidrazın (CA) CO2absorpsiyon performansı üzerindeki biyokatalitik etkisi de araştırılmış, ve CA enziminin toplam absorplanan CO2 miktarınıarttırdığı bulunmuştur. AEPD: 1-hekzanol ve CA ile aktifleştirilen AEPD: 1-hekzanolün CO2 yüklemesi sırasıyla 0.88 ve 0.97mol CO2/mol AEPD bulunmuştur. CO2 desorpsiyon deneyleri, 363 K ve 1.1 bar mutlak N2 basıncında aynı deney düzeneğininfarklı diziliminde gerçekleştirilmiştir. Ultrasonik ışınlamanın 0.1 g/L CA katalizli AEPD: 1-hekzanol sisteminin desorpsiyonperformansı üzerindeki etkisi de araştırılmıştır. Ultrasonik desteğin desorpsiyon süresini kısalttığı ve desorpsiyon hızınıarttırdığı gözlenmiştir. Ayrıca, AEPD:1-Hekzanol sisteminin, CA yokluğunda ve varlığındaki, rejenerasyonun etkinliği, yenidenkullanılabilirliği ve performans kaybı Fourier dönüşümü kızılötesi spektrometresi ile analiz edilmiştir.

Investigation of Biocatalytic Absorption and Ultrasound-Assisted DesorptionPerformance of CO2 Capture

The CO2 absorption-desorption performance of non-aqueous solutions comprising a sterically hindered amine system(2-amino-2-ethyl-1,3-propanediol (AEPD): 1-hexanol) was investigated in a gas-liquid stirred cell reactor undersequential absorption-desorption cycles. The absorption capacity and initial absorption rate were calculated for differentconcentrations of AEPD: 1-hexanol at 303 K and 2 bar absolute pressure. Increasing the amount of AEPD increased theCO2 absorption capacity. The biocatalytic effect of a constant amount of carbonic anhydrase (CA) on the CO2 absorptionperformance was also investigated, and the CA enzyme was found to increase the total amount of absorbed CO2. The CO2loading of AEPD: 1-hexanol and CA activated AEPD: 1-hexanol were 0.88 and 0.97 mol CO2/mol AEPD, respectively. CO2desorption experiments were performed in different sequences of the same experimental set-up at 363 K and 1.1 barabsolute N2 p ressure. T he e ffect o f u ltrasonic i rradiation o n t he d esorption p erformance o f 0 .1 g /L C A c atalyzed A EPD:1-hexanol system was also investigated. It was observed that ultrasonic assistance shortened the desorption time andenhanced the desorption rate. Furthermore, the effectiveness of regeneration, the reusability, and performance loss ofAEPD: 1-hexanol, in the presence and absence of CA, were analyzed by Fourier transform infrared spectrometry.

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