Catalytic Hydrogen Production from Municipal Sludge in Supercritical Water with Partial Oxidation
Catalytic Hydrogen Production from Municipal Sludge in Supercritical Water with Partial Oxidation
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DOI：
10.1007/978-3-540-76694-0_234
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发表时间：
2007
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影响因子：
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通讯作者：
Qinming Zhang;Shuzhong Wang;Liang Wang;Donghai Xu
中科院分区：
文献类型：
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作者：
Qinming Zhang;Shuzhong Wang;Liang Wang;Donghai Xu
采用间歇式反应器，以NaOH为催化剂，对城市污泥进行部分氧化气化。采用过氧化氢作为氧源。在623-723 K、23-28 MPa、反应时间5-40 min的条件下，污泥在低浓度下均能完全气化，无焦炭和焦油生成。气相产物主要由H2、CO2、CO、CH 4等组成，部分氧化提高了气化效率，同时也提高了氢气和一氧化碳的产率。研究了部分氧化的影响。为了比较，我们还在相同的条件下进行了无催化剂的实验。氢氧化钠催化剂的氢产率几乎是无催化剂的2倍。因此，碱催化剂对污泥部分氧化产生H2具有积极作用。氢氧化钠的催化作用是抑制焦炭的生成，促进水煤气变换反应中CO和H2的产率。
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 H2by water-gas shift reaction.