Li2ZrO3'ün Katı Hal Sentezi ve Prosesin Termokimyasal Modellenmesi

Öz

Mevcut çalışmada, ümit verici bir yüksek sıcaklık CO₂ sorbenti olan lityum zirkonatın (Li₂ZrO₃) katı hal sentezi araştırılmıştır. Kalsinasyon sıcaklığının ve süresinin sentez süreci üzerindeki etkileri analiz edilmiş ve optimum deneysel koşulları tahmin etmek için reaksiyonun termokimyasal modellemesi yapılmıştır. Lityum karbonat (Li₂CO₃) ve zirkonyum oksit (ZrO₂) hammadde olarak kullanılmış ve reaksiyonlar 650°C ile 1050°C arasındaki sıcaklıklarda hava atmosferi altında gerçekleştirilmiştir. X-ışını difraksiyon (XRD) ve taramalı elektron mikroskobu (SEM) analizleri, en az 2 saatlik reaksiyon süreleri boyunca 750°C'nin üzerindeki sıcaklıklarda neredeyse saf Li₂ZrO₃ elde edilebileceğini ortaya koymuştur. Bulgular ayrıca yüksek sıcaklıklarda monoklinik-Li₂ZrO₃ oluşumunu da vurgulamıştır. Bu çalışma, Li₂ZrO₃ üretiminde katı hal sentez yönteminin verimliliğini göstermekte ve sürecin termokimyasal davranışına ilişkin öngörüler sunarak, CO₂ yakalama teknolojilerindeki potansiyel uygulamasını kolaylaştırmaktadır.

Anahtar Kelimeler

• Lityum zirkonat
• katı hal sentezi
• termokimyasal modelleme

Solid-State Synthesis of Li2ZrO3 and the Thermochemical Modelling of the Process

Öz

In the present study, the solid-state synthesis of lithium zirconate (Li₂ZrO₃), a promising high-temperature CO₂ sorbent, was investigated. The effects of calcination temperature and duration on the synthesis process were analysed, and the thermochemical modelling of the reaction was done to predict the optimal experimental conditions. Lithium carbonate (Li₂CO₃) and zirconium oxide (ZrO₂) were utilized as raw materials, and the reactions were performed under air atmosphere with temperatures ranging from 650°C to 1050°C. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses revealed that nearly pure Li₂ZrO₃ could be achieved at temperatures above 750°C for reaction durations of at least 2 hours. The findings also highlighted the formation of monoclinic-Li₂ZrO₃ at elevated temperatures. This study demonstrates the efficiency of the solid-state synthesis method for producing Li₂ZrO₃ and provides insights into the thermochemical behaviour of the process, facilitating its potential application in CO₂ capture technologies.

Anahtar Kelimeler

• Lithium zirconate
• solid state synthesis
• thermochemical modelling

Kaynakça

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