Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations
Leaching Characteristics of Organic and Inorganic Matter from Biomass by Water: Differences between Batch and Semi-continuous Operations
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DOI：
10.1021/ie3031168
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发表时间：
2013-03
影响因子：
4.2
通讯作者：
Sui Boon Liaw;Hongwei Wu
中科院分区：
文献类型：
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作者：
Sui Boon Liaw;Hongwei Wu
水可分别从桉叶和木材中浸出30%和1.2%以上的有机质，产生含有机酸的酸性浸出液。结果表明，生物质中有机和无机物种的浸出特性在间歇和半连续浸出操作之间存在显著差异。在常规分批浸提下，酸性浸提液连续接触生物质持续延长的时间段，导致至少一些水不溶性无机物质（例如，有机结合）。因此，分批浸提方法明显高估了生物质中水溶性无机物质的量，并表现出两步浸提动力学，即在初始短时间内的快速浸提步骤，随后在相对长的时间内的缓慢浸提步骤。本研究进一步开发了一种半连续浸出方法，以解决这个问题，通过最大限度地减少渗滤液和生物质样品之间的接触。这个.
Over 30% and ∼2% (on a carbon basis) organic matter can be leached from mallee leaf and wood by water, respectively, producing acidic leachates containing organic acids. As a result, there are significant differences in the leaching characteristics of both organic and inorganic species in biomass between batch and semi-continuous leaching operations. Under conventional batch leaching, the acidic leachate continuously contacts the biomass for a prolonged period, resulting in the leaching of at least some water-insoluble inorganic species (e.g., organically bound) from biomass. Therefore, the batch leaching method clearly overestimates the amount of water-soluble inorganic species in biomass and exhibits two-step leaching kinetics, i.e. a rapid leaching step for an initial short period followed by a slow leaching step for a relatively long period. This study further develops a semi-continuous leaching method to address this issue via minimizing the contact between the leachate and the biomass sample. The se...