Hydrogen production via supercritical water gasification of almond shell over algal and agricultural hydrochars as catalysts
Hydrogen production via supercritical water gasification of almond shell over algal and agricultural hydrochars as catalysts
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DOI：
10.1016/j.ijhydene.2017.05.102
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发表时间：
2018-01
影响因子：
7.2
通讯作者：
F. Safari;N. Javani;Z. Yumurtacı
中科院分区：
文献类型：
--
作者：
F. Safari;N. Javani;Z. Yumurtacı
杏仁壳是伊朗库尔德斯坦省最丰富的农业废弃物之一。采用管式间歇式微反应器，研究了杏仁壳超临界水气化制取富氢气体的反应过程。在不同的条件下进行了非催化试验，以确定最佳的产氢条件。在460 °C的温度、IOmin的停留时间（RT）和0.01的进料/水比（F/W）下观察到7.85mmol/g的最大氢气产率。以刚毛藻（Cladophora glomerata，C.）超临界水处理后的固体残渣为原料，进行了水焦的催化实验。glomerata）大型藻类和小麦秸秆。采用ICP-OES、FESEM和BET等方法对加氢半焦进行了表征。对于催化实验，将氢焦以0.4的重量比添加到杏仁壳中。杏仁壳的转化率和产氢量受氢焦中无机化合物的影响比表面积和孔体积更大。在小麦秸秆和C. glomeratahydrochars。
Almond shell is one of the most abundant agricultural wastes in Kurdistan province of Iran. Conversion of almond shell into hydrogen-rich gas via supercritical water gasification (SCWG) was investigated in this study using a tubular batch micro-reactor system. Non-catalytic tests were carried out in different conditions to determine the optimum condition for H2production. Maximum hydrogen yield of 7.85 mmol/g, was observed in the temperature of 460 °C, residence time (RT) of 10 min and feed/water ratio (F/W) of 0.01. Catalytic experiments were performed using hydrochars as solid residues remained after SCWG of Cladophora glomerata (C. glomerata) macroalgae and wheat straw. Hydrochars were characterized by ICP-OES, FESEM and BET methods. For catalytic experiments, hydrochars were added to the almond shell by the weight ratio of 0.4. Conversion of almond shell and hydrogen production, were more influenced by the presence of inorganic compounds in the hydrochars rather than the surface area and pore volume. The maximum hydrogen yields of 10.77 and 11.63 mmol/g, were observed for catalytic experiments in the presence of wheat straw andC. glomeratahydrochars, respectively.