Twenty-two compositional characterizations and theoretical energy potentials of extensively diversified China's crop residues
Twenty-two compositional characterizations and theoretical energy potentials of extensively diversified China's crop residues
复制标题
中国广泛多样化农作物秸秆的二十二种成分特征和理论能源潜力
DOI：
10.1016/j.energy.2016.01.093
复制
发表时间：
2016-04-01
期刊：
影响因子：
9
通讯作者：
Yang, Zengling
中科院分区：
文献类型：
--
作者：
Niu, Wenjuan;Han, Lujia;Yang, Zengling
了解作物残渣原料的组成特性对于过程控制和处理能源利用中的副产品和废物非常重要。在这项研究中，收集了1076个作物残体来自全国326个地点。对五种有机化学成分、四种工业成分、五种最终成分和八种矿物元素进行了化学分析。根据农作物秸秆的组成特征，对我国农作物秸秆的能源潜力进行了定量分析。结果表明，小麦秸秆、水稻秸秆、玉米秸秆、油菜秸秆和棉秆的组成特征差异显著（p < 0.05），变异性较大。变异系数与作物残体组成均值呈负相关。主成分分析结果表明，各组分能够较好地解释5种作物残体的多种变异和聚类规律。各参数间的相关性可概括为半纤维素/灰分-纤维素/木质素/水溶性碳水化合物/粗蛋白/P、水溶性碳水化合物-粗蛋白、粗蛋白-N-P-Mg-Cu、挥发性物质-灰分-固定碳、C-H-O-N-S、P-K-Na-Ca和灰分-C/H/O/K（p < 0.01）。5种底物的能量势也存在显著差异（p < 0.05）。秸秆的热值、乙醇理论产率和生物甲烷理论产率分别为12.97-18.58 MJ/kg、336.69-658.25 g/kg和151.48-288.45 L/kg。(c)2016爱思唯尔有限公司版权所有
Knowledge of the compositional properties of crop residues feedstocks is important for process control and handling of co-products and waste from energy utilization. In this study, 1076 crop residues were collected from 326 sites across China. Chemical analysis of five organic chemical compositions, four proximate compositions, five ultimate compositions and eight mineral elements were conducted. Energy potentials of crop residues in China were quantified based on their compositional characterization. Results showed that the compositional characteristics of wheat straw, rice straw, corn stover, rape stalk and cotton stalk were shown to be significant different (p < 0.05) and highly variable. The coefficients of variation were negatively correlated with the means of crop residues compositions. Principal component analysis reflected that the compositions could explain several variations and clustering rules of the five crop residues. The correlations among parameters could be briefly summarized as hemicelluloses/ash-cellulose/lignin/water soluble carbohydrates/crude protein/P, water soluble carbohydrates crude protein, crude protein-N-P-Mg-Cu, volatile matter-ash-fixed carbon, C-H-O-N-S, P-K-Na-Ca and ash-C/H/O/K (p < 0.01). The energy potentials of the five substrates were also significantly different (p < 0.05). The higher heating values, theoretical ethanol yields, and theoretical biomethane yields of the crop residues were 12.97-18.58 MJ/kg, 336.69-658.25 g/kg, and 151.48-288.45 L/kg, respectively. (c) 2016 Elsevier Ltd. All rights reserved.