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首页> 外文期刊>Journal of industrial and engineering chemistry >Characteristics of the product from steam activation of sewage sludge
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Characteristics of the product from steam activation of sewage sludge

机译：污水污泥的蒸汽活化产物的特性

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Steam activation of a dried sewage sludge was studied to produce hydrogen rich gas and sludge char for converting to energy and resources. A batch-type wire mesh reactor was used to study the characteristics of the steam activation. The characteristics of activation product (i.e., producer gas, gravimetric tar, light tar, and sludge char) were identified. With the increase in the steam feed rate, the sludge char decreased but the producer gas increased, having higher gas heating value. And tar generation slightly increased when a small amount of steam was fed, but when the steam feed rate significantly increased, tar decreased because part of the tar was converted into light gas. Hydrogen and carbon monoxide increased with the increase in the steam feed rate. And carbon dioxide, methane, ethylene, and ethane reached their maximum according to different production mechanisms up to decreasing the species. The gradually increase in the steam feed rate resulted in the creation of micropores, which developed to the maximum when the steam flow rate was 14 mL/g min. When excessive steam was supplied, however, micropores sank due to the resulting sintering phenomenon, and the adsorption capacity deteriorated. The sludge char had a mean pore size of 6.229 nm, which is the size of mesopores from which condensible tar (the cause of damage on the device) is properly adsorbed and removed.
机译：对干燥的污水污泥的蒸汽活化进行了研究，以产生富氢气体和污泥炭，将其转化为能源和资源。间歇式丝网反应器用于研究蒸汽活化的特性。确定了活化产物的特征（即，生产气，重量焦油，轻质焦油和污泥焦）。随着蒸汽进料速率的增加，污泥炭减少，但生产气增加，具有更高的煤气热值。当供给少量蒸汽时，焦油的产生略有增加，但是当蒸汽进料速率显着增加时，由于部分焦油转化为轻质气体，焦油减少。氢气和一氧化碳随蒸汽进料速率的增加而增加。二氧化碳，甲烷，乙烯和乙烷根据不同的生产机制达到最大，直至减少物种。蒸汽进料速度的逐渐增加导致微孔的产生，当蒸汽流速为14 mL / g min时，微孔发展到最大。然而，当供给过量的蒸汽时，由于产生的烧结现象而使微孔下沉，吸附能力降低。污泥炭的平均孔径为6.229 nm，这是中孔的大小，可凝结的焦油（设备损坏的原因）可以从中孔中被适当地吸附和去除。

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