Guo Yafeng, Cheng Shiye, Du Yu, Lu Na, Li Chao, Bao Hanchun, Zhu Xiao, Tang Shi-Ya
State Key Laboratory of Chemical Safety, Qingdao, China.
SINOPEC Research Institute of Safety Engineering Co., Ltd, Qingdao, China.
Front Chem. 2025 Mar 5;13:1532478. doi: 10.3389/fchem.2025.1532478. eCollection 2025.
Tar reforming has gained widely attention in the field of biomass gasification. Dielectric barrier discharge (DBD) presents a promising technology for the conversion of biomass gasification tar under ambient conditions. In this study, plasma-enhanced dual DBD (ED-DBD) combined with packing materials such as glass (SiO) beads and SiC blocks was utilized to examine the CO reforming of benzene, serving as a tar analogue, into syngas. (Introduction) First, the discharge characteristics and performance metrics for benzene and CO conversion (Method 1) were evaluated and compared between the conventional dual dielectric barrier discharge (D-DBD) system and the ED-DBD reactor, which was augmented with SiO beads and SiC blocks. The findings indicated that the ED-DBD reactor incorporating SiC blocks demonstrated superior performance, achieving a benzene conversion of 51.0%, a CO conversion of 75.0%, and an energy efficiency for CO conversion of 73.9%. The results satisfy the minimum requirements for CO conversion and energy efficiency required for industrial application (Results and Discussion 1). Secondly, analysis via X-ray Photoelectron Spectroscopy (XPS) (Method 2) revealed that a minor proportion of carbon elements originating from the SiC blocks within the plasma region were involved in the reaction process (Results and Discussion 2). Moreover, an elevated initial concentration of CO in the benzene system enhanced the degradation of benzene, whereas the introduction of benzene into the CO system promoted the conversion of CO. Emission spectroscopy (Method 3) corroborated the presence of active hydroxyl radical (·OH) particle during the discharge process. It suggests that the SiC-packed ED-DBD reactor more efficiently generates active OH particles during the discharge compared to the SiO-packed ED-DBD reactor (Results and Discussion 3). This study not only offers an effective method for converting tar analogues into syngas under mild conditions but also presents an alternative approach for CO utilization within a carbon-neutral strategy.
焦油重整在生物质气化领域已受到广泛关注。介质阻挡放电（DBD）是一种在环境条件下转化生物质气化焦油的有前景的技术。在本研究中，采用等离子体增强双介质阻挡放电（ED-DBD）并结合玻璃（SiO）珠和碳化硅块等填充材料，来研究作为焦油类似物的苯的CO重整制合成气过程。（引言）首先，评估并比较了传统双介质阻挡放电（D-DBD）系统与装有SiO珠和碳化硅块的ED-DBD反应器中苯和CO转化的放电特性及性能指标（方法1）。结果表明，装有碳化硅块的ED-DBD反应器表现出优异性能，苯转化率达到51.0%，CO转化率达到75.0%，CO转化的能量效率为73.9%。这些结果满足工业应用所需的CO转化和能量效率的最低要求（结果与讨论1）。其次，通过X射线光电子能谱（XPS）分析（方法2）表明，等离子体区域内源自碳化硅块的少量碳元素参与了反应过程（结果与讨论2）。此外，苯体系中较高的初始CO浓度增强了苯的降解，而将苯引入CO体系则促进了CO的转化。发射光谱（方法3）证实了放电过程中活性羟基自由基（·OH）粒子的存在。这表明与装有SiO的ED-DBD反应器相比，装有碳化硅的ED-DBD反应器在放电过程中能更有效地产生活性OH粒子（结果与讨论3）。本研究不仅提供了一种在温和条件下将焦油类似物转化为合成气的有效方法，还为碳中性策略中的CO利用提供了一种替代方法。
