Carbon giàu oxy từ các polyme liên kết chéo siêu cao được sửa đổi carbonyl để bắt giữ CO2 hiệu quả

Springer Science and Business Media LLC - Tập 27 - Trang 1-8 - 2020
Yafei Sang1, Gui Chen2, Jianhan Huang1
1College of Chemistry and Chemical Engineering, Central South University, Changsha, China
2College of Chemistry and Materials, Huaihua University, Huaihua, China

Tóm tắt

Một loạt các polyme liên kết chéo siêu cao (HCPs) được sửa đổi carbonyl với độ xốp khác nhau đã được chế tạo và chúng đã được carbon hóa để sản xuất các carbon xốp giàu oxy. Kết quả cho thấy các loại carbon này có diện tích mặt cao theo phương pháp Brunauer-Emmett-Teller (BET) từ 440–1769 m2/g và khả năng vi xốp nổi bật từ 72–87%, hàm lượng oxy rất cao sau quá trình carbon hóa với hàm lượng oxy đạt 20.7–29.2 wt%. Sự thu nhận CO2 của PDVC-700-1 là cao nhất với giá trị 303 mg/g ở 273 K và 1.0 bar, trong khi PDV-pc có độ chọn lọc CO2/N2 cao nhất là 46.8. Đặc biệt, quá trình hấp phụ CO2 có tương quan tuyến tính với thể tích vi xốp siêu nhỏ (d < 1.0 nm) với hệ số tương quan là 0.9935 (273 K, 1.0 bar) và hàm lượng oxy cũng có vai trò trong hấp phụ CO2. Những loại carbon xốp này có nhiệt lượng hấp phụ trung bình từ 28.5–34.9 kJ/mol với hiệu suất desorption và tái sử dụng xuất sắc.

Từ khóa

#carbon giàu oxy #polyme liên kết chéo siêu cao #sửa đổi carbonyl #thuốc thử CO2 #hấp phụ

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