Wojcieszak Dawid, Przybył Jacek, Czajkowski Łukasz, Majka Jerzy, Pawłowski Artur
Department of Biosystems Engineering, Poznań University of Life Sciences, ul. Wojska Polskiego 50, 60-627 Poznań, Poland.
Department of Wood Science and Thermal Techniques, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 38/42, 60-637 Poznań, Poland.
Materials (Basel). 2022 Apr 12;15(8):2831. doi: 10.3390/ma15082831.
Over the last decade, there has been increased interest in applying biomass as a raw material for producing biofuels used for thermochemical conversions. Extensive use of biomass could lead to controversial competition for arable land, water, and food; therefore, only waste materials and agricultural by-products and residues should be used to produce biofuels. One suitable by-product of agricultural production is crop residue from the harvest of maize for grain (corn stover). The harvest residues of corn stover consist of four fractions, i.e., husks, leaves, cobs, and stalks, which are structurally and morphologically distinct. The aim of the study was to determine the effect of selected maize cultivars with distinct FAO (Food and Agriculture Organization of the United Nations) earliness classifications on the chemical and energetic properties of their corn cob cores. We determined the chemical properties based on elemental analysis, and the energy properties based on the heat of combustion and calorific values. The content of ash and volatile compounds in the corn cobs were also determined. The results indicated that the heat of combustion of fresh and seasoned corn cob cores ranged from 7.62-10.79 MJ/kg and 16.19-16.53 MJ/kg, respectively. The heat of combustion and calorific value of corn cob cores in the fresh state differed significantly and were strongly correlated with maize cultivars with distinct FAO earliness.
在过去十年中，将生物质作为用于热化学转化的生物燃料的原料的兴趣日益增加。生物质的广泛使用可能会引发对耕地、水和食物的争议性竞争；因此，仅应使用废料、农业副产品和残余物来生产生物燃料。农业生产的一种合适副产品是收获玉米籽粒后的作物残余物（玉米秸秆）。玉米秸秆的收获残余物由四个部分组成，即外皮、叶子、玉米芯和茎杆，它们在结构和形态上各不相同。该研究的目的是确定具有不同联合国粮食及农业组织（FAO）早熟分类的选定玉米品种对其玉米芯核心的化学和能量特性的影响。我们基于元素分析确定了化学性质，并基于燃烧热和热值确定了能量性质。还测定了玉米芯中灰分和挥发性化合物的含量。结果表明，新鲜和风干的玉米芯核心的燃烧热分别为7.62 - 10.79兆焦/千克和16.19 - 16.53兆焦/千克。新鲜状态下玉米芯核心的燃烧热和热值差异显著，并且与具有不同FAO早熟性的玉米品种密切相关。
