Catalytic Hydrogen Production from Municipal Sludge in Supercritical Water with Partial Oxidation
This paper describes partial oxidative gasification of municipal sludge with NaOH catalyst, using a batch type reactor. Hydrogen peroxide was employed as oxygen source. The reaction is studied in the ranges of 623-723 K, 23-28 MPa and various reaction time 5-40 min. We found that sludge at low concentrations can be completely gasified and no char or tar was observed. Gaseous products were composed of H2, CO2, CO, CH4, and so on. The improvement of gasification efficiency by partial oxidation was accompanied with high yield of hydrogen and carbon monoxide. The effect of partial oxidation was investigated. For comparison, we also conducted the experiments without catalyst at the same conditions. The yield of hydrogen with NaOH was almost twice as much as that without catalyst. Thus, a base catalyst has a positive effect on partial oxidation of sludge to produce H2. The catalytic effect of NaOH was the inhibition of char formation and promotion of CO yields and thus H2 by water-gas shift reaction.
Hydrogen production Sewage sludge Supercritical water Partial oxidation Base catalyst
Zhang Qinming Wang Shuzhong Wang Liang Xu Donghai
State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an Shaanxi 710049, China
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）