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bce ›› 2016, Vol. 50 ›› Issue (3): 13-20.doi: 10.3969/j.issn.1673-5854.2016.03.003

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Pyrolysis Process of Corn Stalk Briquettes and Characteristics of Products

YANG Hua1,2, HUANG Li2, LIU Shi-cai1,2, XU Wei2, SUN Yun-juan1,2, HOU Min2   

  1. 1. Research Institute of Forestry New Technology, CAF, Beijing 100091, China;
    2. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Materials, Jiangsu Province, Nanjing 210042, China
  • Received:2015-11-16 Online:2016-05-31 Published:2016-06-03

Abstract: The pyrolysis of corn stalk briquette in a fixed bed was investigated.The influences of pyrolysis temperature on the pyrolysis process and the properties of products (solid charcoal,bio-oil and gaseous product) were studied,too.The research found that with the increase of the pyrolysis temperature,the yield of solid charcoal decreased,and the production of gaseous product increased.The bio-oil yield firstly increased and then decreased with the maximum of 35.61% at 450℃.The proximate,FT-IR and SEM analyses of solid charcoal showed that the charcoal had high ash content,the pyrolysis reaction of corn stalk briquette occuried mainly before 650℃ and the pore structure was honeycomb on the broken section.The GC-MS analyses of bio-oil showed that at low temperature (250-750℃),the organic compounds identified from pyrolysis bio-oil mainly included many oxygenated compounds such as aldehydes,ketones,furans and phenols;the phenolic compounds and furans were most abundant compounds.Nevertheless, the major compounds in the pyrolysis bio-oil obtained at higher temperatures (850-950℃) were polycyclic aromatic hydrocarbons (PAHS).The main compositions of gaseous product were CO2,CO,H2,CH4and a spot of C2Hn.In the temperature of 250-450℃,the high proportion in gaseous were CO and CO2.With the increase of temperature,the productions of CO, H2, CH4 and C2Hn increased,then the calorific value of gaseous product increased.At 650℃,the calorific value of the pyrolysis gas had reached 13.05 MJ/m3 and the rate of increasing slowed down when temperature exceed 650℃.

Key words: corn stalk, briquette, pyrolysis, product properties, pyrolysis bio-oil

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