The current study is to investigate a multi-condenser system for separating pyrolytic vapors as a promoting method to produce bio-oils that are more impervious to aging. Bio-oil vapors produced by fast pyrolysis of cotton stalk in a fluidized bed reactor at a temperature of 500 °C and were divided by a fractional condensation system into four fractions. The results showed that the stability of the fractional bio-oil was improved because most of the reactive aliphatic compounds with small molecules involving water rich organic acids, aldehydes and ketones were effectively separated from the other components. It was found out that the stability of bio-oil was affected by the active chemicals derived from fast pyrolysis as well as the aqueous acidic condition of bio-oils because most polymerization, condensation and electrophilic addition substitution reactions need the presence of H⁺ to be the catalyst. The observation pointed out that the suspended solid particles (SS) in bio-oils can be suppressed by separating conventional bio-oils into different stages by means of concentrating the initial SS in a certain fraction.

目前的研究是研究用于分离热解蒸汽的多冷凝器系统，作为生产更不易老化的生物油的促进方法。在 500 °C 的温度下，在流化床反应器中通过棉杆快速热解产生的生物油蒸气，并通过分馏系统分为四个部分。结果表明，分馏生物油的稳定性得到提高，因为大多数具有小分子的反应性脂肪族化合物涉及富含水的有机酸、醛和酮与其他组分有效分离。结果发现，生物油的稳定性受快速热解产生的活性化学物质以及生物油的酸性水溶液条件的影响，因为大多数聚合反应，⁺成为催化剂。观察指出，通过将初始SS浓缩在一定的分数中，将常规生物油分离成不同阶段，可以抑制生物油中的悬浮固体颗粒（SS）。