白酒酒糟与污水污泥共气化制氢反应特性及协同性分析

Characteristics and synergistic analysis of co-gasification of spirit-based distillers′grains with sewage sludge for hydrogen production

利用固定床为反应器、水蒸气为气化剂进行了污水污泥(SS)和白酒酒糟(SDG)的气化实验,通过分析二者的掺混比和反应温度对二者气化特性的影响,推导了二者共气化的协同作用及协同机理。结果表明,污水污泥比白酒酒糟气化反应活性更强,白酒酒糟比污水污泥合成气选择性更高,二者在气化中存在互补作用。污水污泥与白酒酒糟共气化时,随着共混物中白酒酒糟比例的提高,氢气含量逐渐提高、一氧化碳含量逐渐降低;提高反应温度和增大污水污泥比例,可以提升气化反应的活性。当反应温度为800℃、污水污泥与白酒酒糟的质量比为1∶1时,污水污泥与白酒酒糟共气化具有最大的协同因子(1.36)。污水污泥和白酒酒糟中的钾和钙对气化反应产生了协同催化效果,催化机理为钾和钙的氧化还原循环。

Experiments on the gasification of sewage sludge(SS)and spirit-based distillers′grains(SDG)were conducted using a fixed bed as the reactor and water vapor as the gasification agent.The effects of blending ratio and reaction temperature on the gasification characteristics of SS and SDG were investigated,and the synergistic effects and synergistic mechanisms of SS and SDG co-gasification were analyzed.The results showed that SS had stronger gasification reaction activity than SDG,SDG had higher selectivity than SS syngas,and there were complementary effects in gasification.When SS and SDG were co-gasified,the H2content was gradually increased and CO content was gradually decreased as the proportion of SDG increasing in the blends.Increasing the temperature and increasing the proportion of SS could enhance the gasification reaction activity.When the temperature was 800℃and m(SS)∶m(SDG)=1∶1,SS and SDG co-gasification had the maximum synergistic factor of 1.36.K and Ca in SS and SDG produced synergistic catalytic effect on the gasification reaction,and the catalytic mechanism was the K and Ca redox cycle.