中国多元林草原料生物质资源分布及醇类利用指标分析

Distribution and alcohol-based index analysis of diverse forest and grass biomass resources in China

中国林草原料资源丰富,对其分布的整理不仅有助于推动林草原料的综合利用,也有助于解决林草废弃物带来的环境问题。因此,该研究根据中国大陆地区的地理经纬度,对全国范围内的代表性林草原料进行了分区梳理,并筛选出了各地区的优势林草作物。对多元林草原料的分布与组成特性,水分、挥发分、纤维素含量、半纤维素含量、C元素含量、O元素含量、热值等进行了共性和个性指标的整理,确定了多元林草原料组成与结构分析的数据库检索字段。华东地区甜菜并不适宜作为生物质醇类利用中林草原料,氧元素含量较其他林草原料高出46%,玉米秸秆和水稻秸秆中O元素含量较低,适宜作为生物质醇类利用中林草原料;大豆中纤维素含量明显较低,比其他林草原料低40%,西南地区玉米秸秆高于其他林草原料;西北地区黑麦草和华东地区华南地区甘蔗的比热容值较高,在3.2~4.8 J/(kg·K),其他能源草比热容值多处于0.8~2.4 J/(kg·K)。深入分析各地区代表性林草原料作为醇类利用的指标,探讨多元林草原料的物理性质、化学组成、工业组成、元素组成以及醇类利用潜力的差异性、变异性和相关性。该研究为中国多元林草醇类利用提供了重要的基础支撑和数据参考。

Forest and grass raw materials are abundant resources in China.The proper utilization of these resources can greatly contribute to environmental issues arising from forest and grass wastes.Therefore,this study aims to classify the representative forest and grass raw materials across China's Mainland.The forest and grass crops were determined in each region,according to geographical coordinates.A systematic analysis was implemented to explore the distribution and composition of diverse forest and grass raw materials.Specific indicators were measured,such as the contents of moisture,cellulose,hemicellulose,carbon,oxygen,volatile matter,and calorific value.A framework of database retrieval was established for the composition and structural analysis of diverse forest and grass raw materials.The results indicated that the sugar beet in the East China region exhibited a moisture content ranging from 80%to 90%,with a relatively lower carbon content,compared with the rest energy grasses.Nevertheless,sugar beet was unsuitable for biomass ethanol use,with a higher oxygen content of 46%,compared with the forest and grass raw materials.Soybeans shared the 40%cellulose content significantly lower than the rest.Furthermore,maize and rice crop straws showed relatively lower contents of moisture and ash,with lower oxygen and similar carbon content.Additionally,maize straws in the Southwest exhibited the highest cellulose content among various forest and grass raw materials.Consequently,maize and rice straws were suitable for biomass ethanol utilization.Ryegrass in the Northwest and sugarcane in the East and South presented a higher specific heat capacity ranging from^(3).2 to 4.8 J/(kg·K),whereas other energy grasses generally ranged from 0.8 to 2.4 J/(kg·K).There were some correlations among the physical properties,chemical compositions,industrial compositions,elemental compositions,and ethanol utilization potential of typical forest and grass raw materials.This finding can provide essential support and data references for the ethanol utilization of diverse forest and grass resources.