Kamińska Adrianna, Sreńscek-Nazzal Joanna, Serafin Jarosław, Kałamaga Agnieszka, Kiełbasa Karolina, Wróblewska Agnieszka
Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland.
Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland.
Bioresour Technol. 2025 May;424:132305. doi: 10.1016/j.biortech.2025.132305. Epub 2025 Feb 25.
The use of orange peel as a precursor for activated carbon (AC) is a promising way to valorize this waste due to its ease of acquisition and the high elemental carbon content of this raw material. In this study, two different methods for the synthesis of carbon catalysts based on AC from biomass were presented. In these methods, HPO was used as the chemical activator, while Cu (NO) acted as the metal precursor for the active phase of the catalyst. Copper was introduced into the carbon material at different stages of preparation (before and after carbonization). The catalysts were characterized using FTIR, XRD, SEM, EDX and XPS. The textural properties were investigated using N sorption at -196 °C. These materials were successfully used in the oxidation of α-pinene and the conversion of this cheap terpene into compounds of great industrial importance (α-pinene oxide, verbenone and verbenol). The results showed that the material prepared by impregnating the already prepared carbon support (AC_5%Cu_impregnation) was more active. For this catalyst, the conversion of α-pinene was 53 mol%, while this value for AC_5%Cu_oven sample was 43 mol%. The selectivity of the α-pinene oxide was 48 mol% for AC_5%Cu_impregnation sample and 39 mol% for AC_5%Cu_oven catalyst. The selectivities of the other products eg. verbenone and verbenol were not significantly different for both catalysts. Considering catalytic activity, it was found that a better method of prepared catalysts for use in the α-pinene oxidation was impregnation of carbonaceous support with a copper salt solution after the carbonization process.
由于橙皮易于获取且这种原材料的元素碳含量高，因此将其用作活性炭（AC）的前驱体是一种很有前景的废物利用方式。在本研究中，提出了两种基于生物质AC合成碳催化剂的不同方法。在这些方法中，HPO用作化学活化剂，而Cu(NO)用作催化剂活性相的金属前驱体。在制备的不同阶段（碳化前后）将铜引入碳材料中。使用FTIR、XRD、SEM、EDX和XPS对催化剂进行了表征。在-196°C下使用N吸附研究了其结构性质。这些材料成功用于α-蒎烯的氧化，并将这种廉价的萜烯转化为具有重要工业价值的化合物（α-蒎烯氧化物、马鞭草烯酮和马鞭草烯醇）。结果表明，通过浸渍已制备的碳载体（AC_5%Cu_浸渍）制备的材料活性更高。对于该催化剂，α-蒎烯的转化率为53mol%，而AC_5%Cu_烘箱样品的该值为43mol%。AC_5%Cu_浸渍样品的α-蒎烯氧化物选择性为48mol%，AC_5%Cu_烘箱催化剂的选择性为39mol%。两种催化剂的其他产物（如马鞭草烯酮和马鞭草烯醇）的选择性没有显著差异。考虑到催化活性，发现用于α-蒎烯氧化的更好的催化剂制备方法是在碳化过程后用铜盐溶液浸渍碳质载体。
