Mechanisms of liquefaction and pyrolysis reactions of biomass
Mechanisms of liquefaction and pyrolysis reactions of biomass
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DOI：
10.1016/s0196-8904(99)00130-2
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发表时间：
2000-04-01
影响因子：
10.4
通讯作者：
Demirbas, A
中科院分区：
文献类型：
--
作者：
Demirbas, A
在液化过程中，水解产生的胶束状破碎碎片通过脱水、脱氢、脱氧和脱羧降解为较小的化合物。这些化合物一旦产生，通过缩合、环化和聚合重新排列，导致新的化合物。生物质、纤维素、半纤维素和产物的热解聚和分解以及木炭的固体残余物形成。分别研究了生物质样品结构组分的热解降解机理。在600-650 K温度范围内，4-烷基愈创木酚的热解反应首先发生的是木质素中芳香族C-O键的断裂，生成一个氧原子产物，而甲基C-O键的断裂则生成两个氧原子产物。侧链C-C键的裂解发生在芳环和α-碳原子之间。(C)1999 Elsevier Science Ltd.保留所有权利。
In the liquefaction process, the micellar-like broken down fragments produced by hydrolysis are degraded to smaller compounds by dehydration, dehydrogenation, deoxygenation and decarboxylation. These compounds once produced, rearrange through condensation, cyclization and polymerization, leading to new compounds. Thermal depolymerization and decomposition of biomass, cellulose, hemicelluloses and products were formed as well as a solid residue of charcoal. The mechanism of pyrolytic degradation of structural components of the biomass samples was separately studied. Cleavage of the aromatic C-O bond in lignin led to the formation of one oxygen atom products, and the cleavage of the methyl C-O bond to form two oxygen atom products is the first reaction to occur in the thermolysis of 4-alkylguaiiacol at 600-650 K. Cleavage of the side chain C-C bond occurs between the aromatic ring and the cc-carbon atom. (C) 1999 Elsevier Science Ltd. All rights reserved.