Physicochemistry and Utilization of Wood Vinegar from Carbonization of Tropical Biomass Waste

Y. Theapparat, A. Chandumpai, DamrongsakFaroongsarng
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引用次数: 37

Abstract

Pyroligneous acid also called wood vinegar is an aqueous liquid produced from pyrolysis of lignocellulose waste and biomass. In general, the pyrolysis types are classified base on heating rate mainly either fast or slow pyrolysis. The characteristic and properties of wood vinegar are primarily influenced by the type of carbonaceous feedstocks as well as the production techniques. Wood vinegar is a complex mixture of polar and non-polar chemicals with various molecular weights and compositions. Its major constituent is water (80 – 90%). Some physical properties; such as pH, specific gravity, dissolved tar content are, respectively, within the range of 2 – 4, 1.005 – 1.016 g/mL, 0.23 – 0.89% wt, and color, odor and transparency have been reported. In addition, the degree of o Brix was ranged between 1.7 and 6.6. Besides water, the chemical compositions of wood vinegars consisted of acetic acid with the largest component (30.45 – 70.60 mg.mL (cid:1) 1 ). A high number of phenol derivatives have been found and those in higher concentrations were 4-propyl-2-methoxyphenol (5 – 11 mg.mL (cid:1) 1 ) followed by 2-methylphenol (2 – 4 mg.mL (cid:1) 1 ). Wood vinegar has been regarded as a natural product, which claimed to be capable in several fields of application. In agriculture, wood vinegar has been used in vegetable cropping in order to combat disease, pest control, improve growth and fruit quality, seed germination accelerator
热带生物质废弃物炭化木醋的理化及利用研究
热解酸也称为木醋,是由木质纤维素废料和生物质热解产生的一种含水液体。一般来说,根据升温速率对热解类型进行分类,主要分为快热解和慢热解。木醋的特点和性能主要受碳质原料类型和生产工艺的影响。木醋是极性和非极性化学物质的复杂混合物,具有不同的分子量和组成。它的主要成分是水(80 - 90%)。一些物理性质;如pH值、比重、溶解焦油含量分别在2 - 4、1.005 - 1.016 g/mL、0.23 - 0.89% wt范围内,颜色、气味和透明度均有报道。0 Brix度在1.7 ~ 6.6之间。除水外,木醋的化学成分以醋酸为主,含量为30.45 ~ 70.60 mg。mL (cid:1)发现了大量的苯酚衍生物,其中浓度较高的是4-丙基-2-甲氧基苯酚(5 - 11毫克)。mL (cid:1),然后是2-甲基苯酚(2 - 4mg)。mL (cid:1)木醋一直被认为是一种天然产物,据称在许多领域都有应用。在农业上,木醋已用于蔬菜种植,以防治病虫害,改善生长和果实品质,促进种子发芽
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