Experimental Research of Thermometamorphic Process of Modern Pineal Pollens
摘要: 本文通过现代松粉较大样品量的热模拟定量研究，认为松粉具有很大的生烃潜力，其特性接近于１类干酪根。以甲烷为主的伴生烃类气体最高产率达２４７ｍ３/ｔ。液态烃包括轻烃和抽提物，产率最高分别达６６．８ｋｇ/ｔ和９４．８ｋｇ/ｔ。受热变质的松粉，低温阶段主要是收缩变小，逐步出现裂隙和本体与气囊分离，３５０℃以上完全破碎。随温度升高松粉及碎片的颜色不断加深，主要调１５０℃以下为黄，２００℃～３００℃为棕，２５０℃～４５０℃为棕黑，５００℃以上为黑。色度指数和镜质组反射率值也随温度升高而增大。Abstract: By means of thermal modeling of compound samples which are composed of kaolinnes and modern pineal pollens, the thermometamorphic process of modern pineal pollens were succesively revealed, the products of solids, liquids and gases produced during the thermal degradation were quantitatively gathered, the geochemical characteristics of the products were primarily researched, and the shapes and colours of the pineal pollens during the thermometamorphic process were carefully observed.The gas products of the thermolysis of the pineal pollens included hydrocarbons and nonhydrocarbons. The products of hydrocarbon gases occoured at 200℃, clearly going up above 400℃, up to its maxium (247m3/t) at 600℃. The relative content of the hydrofarbon gases increased with the increase of tempratures, reaching its maxium (55. 77 %) at 500℃. The hydrocarbon gases were mainly composed of methane, ethane and propane with minor amount of butane。 The non-hydrocarbon gases predorminantly consisted of CO and H with certain amount of CO and N2 . The liquid products of the thermolysis are water, light hydrocarbon and extracts. The light hydrocarbons appeared at 250℃, their production went up with the increas of the tempretures, up to their maxium at 450℃ (66. 83kg/t), and then dropping rapidly. The components of light hydrocarbons were mainly satured hydrocarbons, monocyclic aromatic hydrocarbons and dicyclic aromatic hydrocarbons. The extracts were mainly produced at the tempretures below 400℃, the production of them reached its maxium (98. 4kg/t) at 300℃. The extracts contended higher quantities of non-hydrocarbons and alsphaltenes. The content of the satured hydrocarbons and aromatic hydrocarbons rose with the tempretures increasing, up to their highests of 37 % and 29 % respectively.During the thermometamorphic process of the pineal pollens the shapes of them mainly shrank and became small in the period of low tempretures, appearing fissures at 250℃, their sacs separating from their bodies at 300℃, and crushing completely at 350℃。 Their colours darkened with the tempretures rising, being yellow below the tempretures of 150℃, brown at the tempretures of 200℃ ～ 300℃, brown black at 350℃ ～450℃ and black above 500℃. The colour index and vitrinite reflectance of the pineal pollens also increased with the increasing of the tempretures.
10.Brooks J. et al.，1972, Geochmistry of sporopollenin, Chemical Geology, 10(1):69-87.
11.Pierart P. et al.，1981，Changes in sporopollenin during thermal treatment, Organic maturation studies of fossil fuelexploration, New York, 53-73.
12.Sengupta S.，1977, A comparative study of gradual degradation of exins, resulting from the effects of temperature，Review of Palaeobatany and Palynology, 24(5):239-246.
- 文章访问数: 383
- HTML全文浏览量: 1
- PDF下载量: 294
- 被引次数: 0