铈改性海藻炭基催化剂选择性催化氧化苯甲醇制备苯甲醛的研究  

Selective oxidation of benzyl alcohol to benzaldehyde over Ce-modified algal-based biochar

作　　者：何盈 袁川 凌祺凡 曹斌[1] 何思蓉 王爽[1] HE Ying;YUAN Chuan;LING Qifan;CAO Bin;HE Sirong;WANG Shuang(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《能源环境保护》2024年第6期125-131,共7页Energy Environmental Protection

基　　金：江苏省杰出青年基金资助项目(BK20230012)。

摘　　要：苯甲醛作为一种重要的化学品中间体,在医药、精细化工等领域广泛应用。为解决传统苯甲醛合成中污染较大的问题,通过苯甲醇催化氧化制备苯甲醛具有较高的研究价值和现实意义。以广泛分布且廉价的大型海藻为原料,制备了海藻炭基催化剂载体,并在其表面均匀负载CeO2,制备了具有优异催化氧化性能的铈改性海藻炭基催化剂。通过扫描电子显微镜、X射线衍射仪、X射线能谱仪等多种表征手段对催化剂的理化特性进行深入分析。基于控制变量试验,进一步考察催化氧化过程中反应温度、氧化反应时间、CeO_(2)掺杂量以及催化剂用量对苯甲醇转化率和苯甲醛选择性的影响。结果表明,所制备的铈改性海藻碳基催化剂可在温和条件下实现苯甲醇的高效转化,苯甲醇的转化率与苯甲醛的选择性分别为100%和86.59%,实现了在温和条件下将苯甲醇高选择性转化为苯甲醛,为绿色、经济、环保制备苯甲醛提供了参考。As an important chemical intermediate,benzaldehyde is widely used in medicine and fine chemicals.To address pollution in traditional benzaldehyde synthesis,preparing benzaldehyde through the catalytic oxidation of benzyl alcohol holds significant research and practical value.In this study,a cerium-modified algal-derived biochar catalyst with excellent catalytic oxidation performance was prepared.The physicochemical properties of the catalysts were thoroughly analyzed using various characterization methods,including scanning electron microscope,X-ray diffractometer,and X-ray energy spectrometer.The effects of reaction temperature,oxidation reaction time,CeO2 doping,and catalyst dosage on benzyl alcohol conversion and benzaldehyde selectivity during catalytic oxidation were further investigated through controlled variable tests.The results showed that the prepared catalysts enabled efficient conversion of benzyl alcohol under mild conditions,with conversion rates of 100%and benzaldehyde selectivity of 86.59%.This study demonstrates the highly selective conversion of benzyl alcohol to benzaldehyde under mild conditions and proposes an alternative for the preparation of benzaldehyde in a green,economical,and environmentally friendly way.

关 键 词：生物质 海藻 生物炭 催化氧化 苯甲醛 

分 类 号：X505[环境科学与工程—环境工程]