| 张顺元,张洪伟,张克江.响应面法优化棉秆水热液化生产腐植酸的运行条件[J].农业环境科学学报,2024,43(2):434-441. |
| 响应面法优化棉秆水热液化生产腐植酸的运行条件 |
| Optimization of operating conditions for the production of humic acid by hydrothermal liquefaction of cotton straw using response surface methodology |
| 投稿时间：2023-09-06 |
| DOI：10.11654/jaes.2023-0723 |
| 中文关键词: 水热液化 棉秆 响应面法 腐植酸 |
| 英文关键词: hydrothermal liquefaction cotton stalk response surface method humic acid |
| 基金项目: |
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| 摘要点击次数: 325 |
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| 中文摘要: |
| 为优化棉秆水热液化生产含腐植酸液态肥的运行条件，确定反应条件间的交互作用及其反应产物的组成，采用三因素三水平的响应面分析方法，探究了反应温度（X1，260~340℃）、反应时间（X2，30~90 min）和物料质量分数（X3，5%~10%）对水溶肥腐植酸产率的影响。回归模型方差分析表明，反应温度、反应时间以及物料质量分数均对腐植酸产率有较大影响。其中，物料质量分数是最重要的参数。腐植酸产率的最佳反应条件为：反应温度300℃，反应时间90 min，物料质量分数10%。在此条件下，腐植酸产率为4.10%，高于国家含腐植酸水溶肥标准（NY 1106—2010）中规定的腐植酸含量（不小于3%），与预测值吻合较好。GC-MS分析表明，棉秆水热液化的水溶性产物主要含有酚类及其衍生物、酮类、醛类、醇类以及有机酸化合物。 |
| 英文摘要: |
| We determined the interaction between reaction conditions and the composition of reaction products to optimize the operating conditions for producing liquid fertilizer containing humic acid using hydrothermal liquefaction of cotton stalks. A response surface analysis method with three factors and three levels was used to investigate the effects of reaction temperature（X1, 260–340 ℃）, reaction time （X2, 30–90 min）, and material mass fraction（X3, 5%–10%）on the yield of humic acid in water-soluble fertilizers. Regression model analysis of variance showed that reaction temperature, reaction time, and material mass fraction all significantly impacted the yield of humic acid. Among them, the material mass fraction was the most important parameter. The optimal reaction conditions for the yield of humic acid were reaction temperature 300 ℃, reaction time 90 minutes, and material mass fraction 10%. Under these conditions, the yield of humic acid was 4.10%, which is higher than the humic acid content specified in the national standard for humic acid water-soluble fertilizers（not less than 3%; NY 1106—2010）and is in good agreement with the predicted value. GC-MS analysis showed that the water-soluble products of cotton stem hydrothermal liquefaction mainly contained phenols and their derivatives, i.e., ketones, aldehydes, alcohols, and organic acid compounds. |
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