Hydrogen production from catalytic gasification of cellulose in supercritical water
Hydrogen production from catalytic gasification of cellulose in supercritical water
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DOI：
10.1016/j.cej.2005.05.002
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发表时间：
2005-06
影响因子：
15.1
通讯作者：
Xiaohong Hao;Liejin Guo;Ximin Zhang;Y. Guan
中科院分区：
文献类型：
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作者：
Xiaohong Hao;Liejin Guo;Ximin Zhang;Y. Guan
对大规模使用生物质作为能源和氢的兴趣主要是由全球环境问题引起的。本文以纤维素和木屑为原料，以Ru/C、Pd/C、CeO2、纳米CeO2和纳米（CeZr）xO2为催化剂，在超临界水中气化制备富氢气体。结果表明，催化剂的活性大小依次为Ru/C> Pd/C>纳米（CeZr）xO2>纳米CeO2> CeO2颗粒。低浓度羧甲基纤维素钠（CMC）（2 - 3wt. %）与颗粒状生物质和水混合，形成均匀稳定的粘性糊状物，该糊状物可以有效地气化。10wt. %在500 ℃、27MPa、20min的超临界水停留时间条件下，Ru/C催化剂可使纤维素或木屑与CMC几乎完全气化，每100g原料产氢2-4g，潜在产氢11-15g。
Interests in large-scale use of biomass for energy and in hydrogen are motivated largely by global environmental issues. Cellulose and sawdust were gasified in supercritical water to produce hydrogen-rich gas in this paper, and Ru/C, Pd/C, CeO2paticles, nano-CeO2and nano-(CeZr)xO2were selected as catalysts. The experimental results showed that the catalytic activities were Ru/C>Pd/C>nano-(CeZr)xO2>nano-CeO2>CeO2particle in turn. Low-concentration sodium carboxymethylcellulose (CMC) (2–3wt.%) was mixed with particulate biomass and water to form a uniform and stable viscous paste which can be efficiently gasified. The 10wt.% cellulose or sawdust with CMC can be gasified near completely with Ru/C catalyst to produce 2–4g hydrogen yield and 11–15g potential hydrogen yield per 100g feedstock at the condition of 500°C, 27MPa, 20min residence time in supercritical water.