文献类型：期刊文献

英文题名：Atmosphere controlled sulfur migration in microwave fluidized-bed pyrolysis of high sulfur seaweed for clean energy

作者：Xu, Qing[1,2];Chen, Baokang[1];Xian, Shengxian[1,2];Li, Haowei[1,2];Wu, Yujian[1,2];Zhang, Zongliang[1];Chen, Yanxu[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean Engn & Energy, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China

年份：2026

卷号：195

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：SCI-EXPANDED(收录号：WOS:001696536700001)、、WOS

基金：This work was supported by the National Natural Science Foundation of China (No.52476190) , the National Natural Science Foundation of China (No.52376171) , Joint Training Demonstration Base Project for Graduate Students of "Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences" in Guangdong Province, Zhanjiang Science and Technology Plan Project (2025A401002) , Guangdong Basic and Applied Basic Research Foundation (2023A1515110541) ,Guangdong Basic and Applied Basic Research Foundation (2025A1515010722) , Characteristic and Innovative Projects of General Institutions of Higher Education in Guangdong Province (2025KTSCX044) ,Youth S&T Talent Support Programme of Guangdong Provincial Association for Science and Technology (SKXRC2025404) ,Zhanjiang Non-Funded Science and Technology Research Program Projects (2025B01054) ,Guangdong Basicand Applied Basic Research Foundation (2024A1515010637) ,Zhanjiang Marine Youth Talent Innovation Project (Grant No. 2024R3002) .

语种：英文

外文关键词：Microwave pyrolysis; Seaweed; Complex atmosphere; Pyrolysis characteristics; Sulfur release characteristics

外文摘要：High-sulfur marine biomass Ascophyllum nodosum (AS) faces severe environmental challenges in energy utilization due to sulfur emissions during thermal conversion. Microwave fluidized-bed pyrolysis offers an efficient conversion route; however, sulfur migration behavior under complex atmospheres remains insufficiently understood. In this study, AS was systematically investigated in a microwave fluidized-bed reactor under N2, CO2, H2O, and CO2-H2O mixed atmospheres (volume ratios of 3:7, 1:1, and 7:3), with particular emphasis on the effects of atmosphere on microwave heating characteristics and sulfur migration pathways. The results show that steam enhances the heating rate of the system. Under an H2O:N2 ratio of 1:1, the sulfur content in bio-oil increased by 19 %, and the H2S yield rose with increasing steam proportion, reaching a maximum of 6.5 & times; 10-2 mmol & sdot;min-1 . In contrast, CO2 caused a delayed temperature rise due to a dilution effect; however, high CO2 concentrations competitively occupied active sites and promoted biochar aromatization, resulting in more than 50 % of sulfur being retained in the solid char. Under CO2-H2O mixed atmospheres, particularly at a volume ratio of 7:3, sulfur in the char was preferentially fixed in organic sulfur structures, while the generation of gaseous sulfur species decreased by more than 10 %. These results demonstrate that regulating the CO2/H2O mixing ratio can effectively promote sulfur capture while enhancing the formation of value-added products, thereby providing an important theoretical basis for the clean and high-value utilization of high-sulfur marine biomass.