Niu Yifei, Ma Xiaolong, Lu Guangyi, Zhao Dandan, Ma Zichuan
Hebei Key Laboratory of Inorganic Nano-Materials, College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang 050024, China.
School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
Molecules. 2024 Oct 14;29(20):4868. doi: 10.3390/molecules29204868.
Volatile organic compounds (VOCs), particularly aromatic hydrocarbons, pose significant environmental risks due to their toxicity and role in the formation of secondary pollutants. This study explores the potential of catalytic pyrolysis as an innovative strategy for the effective remediation and conversion of aromatic hydrocarbon pollutants. The research investigates the high-efficiency removal and resource recovery of the VOC toluene using a Ni/AlO catalyst. The Ni/AlO catalyst was synthesized using the impregnation method and thoroughly characterized. Various analytical techniques, including scanning electron microscopy, X-ray diffraction, and N adsorption-desorption isotherms, were employed to characterize the AlO support, NiO/AlO precursor, Ni/AlO catalyst, and the resulting solid carbon. Results indicate that Ni predominantly occupies the pores of -AlO, forming nano/microparticles and creating interstitial pores through aggregation. The catalyst demonstrated high activity in the thermochemical decomposition of toluene into solid carbon materials and CO-Free hydrogen, effectively addressing toluene pollution while recovering valuable resources. Optimal conditions were identified, revealing that a moderate temperature of 700 °C is most favorable for the catalytic process. Under optimized conditions, the Ni/AlO catalyst removed 1328 mg/g of toluene, generated 915 mg/g of carbon material, and produced 1234 mL/g of hydrogen. The prepared carbon material, characterized by its mesoporous structure and high specific surface area graphite nanofibers, holds potential application value in adsorption, catalysis, and energy storage. This study offers a promising approach for the purification and resource recovery of aromatic volatile organic compounds, contributing to the goals of a circular economy and green chemistry.
挥发性有机化合物（VOCs），尤其是芳香烃，由于其毒性以及在二次污染物形成中的作用，带来了重大的环境风险。本研究探索了催化热解作为一种创新策略，用于有效修复和转化芳香烃污染物的潜力。该研究调查了使用Ni/AlO催化剂对挥发性有机化合物甲苯的高效去除和资源回收。采用浸渍法合成了Ni/AlO催化剂并进行了全面表征。使用了各种分析技术，包括扫描电子显微镜、X射线衍射和N吸附-脱附等温线，来表征AlO载体、NiO/AlO前驱体、Ni/AlO催化剂以及生成的固体碳。结果表明，Ni主要占据γ-AlO的孔隙，形成纳米/微粒，并通过聚集产生间隙孔隙。该催化剂在将甲苯热化学分解为固体碳材料和无CO的氢气方面表现出高活性，有效解决了甲苯污染问题，同时回收了有价值的资源。确定了最佳条件，结果显示700℃的适中温度对催化过程最为有利。在优化条件下，Ni/AlO催化剂去除了1328 mg/g的甲苯，生成了915 mg/g的碳材料，并产生了1234 mL/g的氢气。所制备的碳材料具有介孔结构和高比表面积的石墨纳米纤维，在吸附、催化和能量存储方面具有潜在的应用价值。本研究为芳香挥发性有机化合物的净化和资源回收提供了一种有前景的方法，有助于实现循环经济和绿色化学的目标。
