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Py-GC/MS study of lignin pyrolysis and effect of catalysts on product distribution

International Journal of Agricultural and Biological Engineering 2017年第5期10卷 214-225页

作者： Si Zhan Wang Chenguang Bi Kang Zhang Xinghua Yu Chiling Dong Renjie Ma Longlong Pang Changle Bioenergy and Environment Science&Technology Laboratory College of EngineeringChina Agricultural UniversityBeijing 100083China Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Key Laboratory of Clean Production and Utilization of Renewable Energy Ministry of AgricultureBeijing 100083China School of Chemical Engineering and Energy Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China National Center for International Research of BioEnergy Science and Technology Ministry of Science and TechnologyBeijing 100083China Department of Vehicle Engineering College of EngineeringChina Agricultural UniversityBeijing 100083China

Fast pyrolysis is one of the most promising methods to convert lignin into fuels and *** the present study,pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS)was used to evaluate vapor phase product distribution of lignin fast *** the non-catalytic pyrolysis process,lignin was pyrolyzed at 400℃,500℃ and 600℃ respectively,finding that the highest yield of aromatic hydrocarbons was obtained at 600℃.Catalytic pyrolysis experiments were also conducted to investigate the effects of catalyst pore structure and acidity on the product *** different catalysts(HZSM-5,MCM-41,TiO_(2),ZrO_(2) and Mg(Al)O)were applied to lignin catalytic pyrolysis,and the catalytic performance was estimated by analyzing the pyrolytic *** catalysts were characterized by using X-ray diffraction(XRD),BET,and NH3(CO_(2))temperature programmed *** on these characterizations,discussion was carried out to explain the formation of the produc *** the five catalysts,HZSM-5 exhibited the best performance on the formation of aromatic hydrocarbons.

关键词： lignin Py-GC/MS fast pyrolysis catalytic upgrading pore structure acid-base property

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Study on Improvement of Flowering Cherry Soil in Nanshan Botanical Park of Chongqing City

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Agricultural Biotechnology 2020年第1期9卷 57-59页

作者： Fuyin XU Tao WAN Chongqing Landscape and Gardening Research Institute Chongqing 401329China Chongqing Urban Landscape Engineering Technology Research Center Chongqing 401329China

[Objectives] This study was conducted to analyze the current status of soil quality in Chongqing and provide scientific data for the rejuvenation of flowering cherry in the botanical park of the city. [Methods] With the flowering cherry soil in Chongqing Botanical Park as the research object, the typical soil in this area was investigated and improved. [Results] After applying soil conditioners, the pH value of the surface soil decreased from 7.32 to 6.34, and the pH value of the bottom soil decreased from 7.52 to 6.77;and the surface soil organic matter increased from 35.2 to 54.1 g/kg, and the bottom soil organic matter increased from 15.7 to 26.3 g/kg. [Conclusions] The soil has strong buffering capacity, and it is difficult to achieve rapid adjustment of soil pH and organic matter in actual work. Soil improvement needs to be carried out step by step. After targeted improvement, further maintenance is required in the later stage.

关键词： Flowering cherry Organic matter acid-base property Soil improvement

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