CO2 mitigation by carbon nanotube formation during dry reforming of methane analyzed by factorial de

• 作 者: Tiago P. Braga Regina C. R. Sa
• 机 构: Department of Analytical Chemistry and Physical Chemistry,Department of Chemistry
• 出 处: 催化学报
• 发表日期: 2004年期
• 关键词: Factorial design Carbon dioxide Reforming Methane Carbon nanotube

A factorial experimental design was combined with response surface methodology (RSM) to opti-mize the catalyzed CO2 consumption by coke deposition and syngas production during the dry re-forming of CH4. The CH4/CO2 feed ratio and the reaction temperature were chosen as the variables, and the selected responses were CH4 and CO2 conversion, the H2/CO ratio, and coke deposition. The optimal reaction conditions were found to be a CH4/CO2 feed ratio of approximately 3 at 700 °C, producing a large quantity of coke and realizing high CO2 conversion. Furthermore, Raman results showed that the CH4/CO2 ratio and reaction temperature affect the system’s response, particularly the characteristics of the coke produced, which indicates the formation of carbon nanotubes and amorphous carbon.