Sequential supercritical water gasification and partial oxidation of hog manure
Sequential supercritical water gasification and partial oxidation of hog manure
复制标题
DOI：
10.1016/j.ijhydene.2010.08.097
复制
发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Emhemmed A. Youssef;E. Elbeshbishy;H. Hafez;G. Nakhla;P. Charpentier
中科院分区：
文献类型：
--
作者：
Emhemmed A. Youssef;E. Elbeshbishy;H. Hafez;G. Nakhla;P. Charpentier
在间歇式反应器中，在500°C、28 MPa的温度和压力下，采用几种金属催化剂，研究了超临界水气化部分氧化猪粪催化制氢的反应。猪粪的特征是总化学需氧量（TCOD）和可溶性化学需氧量（SCOD）分别为57，000和28，000 mg/L，总悬浮固体（TSS）和挥发性悬浮固体（VSS）分别为25，000和19，000，氨分别为2400 mg/L。产氢量大小顺序为Pd/AC>Ru/Al 2 O 3>Ru/AC>NaOH，COD去除率大小顺序为NaOH>Ru/AC>AC>Ru/Al 2 O 3>Pd/AC。实验研究了挥发性脂肪酸（VFAs）、乙醇、甲醇、氨、H2S和硫酸盐的行为，并进行了讨论。在连续气化部分氧化（氧化剂在理论要求的80%）实验中观察到的H2和CH 4产率减少35%相比，气化实验（仅催化剂）。此外，气体产率的这种降低与液体流出物化学需氧量（COD）降低45%、液体流出物中氨浓度降低60%和流出气体中H2S浓度降低20%相一致。
The catalytic hydrogen production from hog manure using supercritical water gasification and partial oxidation was investigated in a batch reactor at a temperature of 500°C, and pressure of 28MPa using several metallic catalysts. Hog manure was characterized by a total and soluble chemical oxygen demand (TCOD, SCOD) of 57,000 and 28,000mg/L, total and volatile suspended solids (TSS, VSS) of 25,000, 19,000, and ammonia of 2400mg/L, respectively. The order of H2production was the following: Pd/AC>Ru/Al2O3>Ru/AC>AC>NaOH, and the order of COD reduction efficiency was as follows: NaOH>Ru/AC>AC>Ru/Al2O3>Pd/AC. The behavior of the volatile fatty acids (VFAs), ethanol, methanol, ammonia, H2S, and sulfate was investigated experimentally and discussed. A 35% reduction in the H2and CH4yields was observed in the sequential gasification partial oxidation (oxidant at an 80% of theoretical requirement) experiments compared to the gasification experiments (catalyst only). Moreover, this reduction in gas yields was coincided with a 45% reduction in the liquid effluent chemical oxygen demand (COD), 60% reduction of the ammonia concentration in the liquid effluent, and 20% reduction in the H2S concentration in the effluent gas.