Pyrolysis characteristics of black liquor solid(BLS)was studied on a tubular reactor furnace at 400-800 ℃. The composition of the liquid products and the distribution characteristics of gas products were analyzed by GC-MS and GC. The surface morphology of chars from BLS pyrolysis was characterized by SEM-EDS analysis. The release rule of important volatile matters in BLS pyrolysis process was discussed with the TG-FTIR. The results showed that the main components of the gas products were H2,CO,CO2 and CxHy(CH4,C2H2,C2H4,C2H6), and phenols, ketones, alcohols, acids, furans, and aromatic compounds in liquid products. TG-FTIR results revealed that the release time of BLS pyrolysis products mainly concentrated in 1 000-2 000 s(300-600 ℃), at this time, the released products mainly include H2O, CO2, CH4, CO and alkanes, aromatics, phenols, alcohols and ketone compounds.
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] Larson E D, Consonni S, Katofsk R E, et al. A cost-benefit assessment of gasification-based biorefining in the kraft pulp and paper industry[R]. New Jersey, USA: The U.S. Department of Energy and the American Forest and Paper Association, 2006.
[2] Dickinson J A, Verrill C L, Kitto J B. Development and evaluation of a low-temperature gasification process for chemical recovery from kraft black liquor[R]. Florida:International Chemical Recovery Conference,1998.
[3] Eriksson H, Harvey S. Black liquor gasification-consequences for both industry and society[J]. Energy,2004,29(4):581-612.
[4] Bhattacharya P K, Shrinath A S, Kunzru D. Pyrolysis of black liquor[J]. Journal of Chemical Technology and Biotechnology, 1985,35A(5):223-233.
[5] Sricharoenchaikul V, Hicks A L, Frederick W J. Carbon and char residue yields from rapid pyrolysis of kraft black liquor[J]. Bioresource Technology, 2001, 77(2):131-138.
[6] Viboon Sricharoenchaikul, Wm James Frederick Jr, Pradeep Agrawal. Carbon distribution in char residue from gasification of kraft black liquor[J]. Biomass and Bioenergy, 2003, 25(2):209-220.
[7] 郭伊丽, 武书彬, 王少光, 等. 黑液热裂解行为的初步研究[J]. 中国造纸, 2006,25(12):65-67. Guo Y L, Wu S B, Wang S G, et al. Preliminary study of the black liquor pyrolysis behavior[J]. China Pulp & Paper, 2006,25(12):65-67.
[8] Guo D L, Wu S B, Lou R,et al. Effect of organic bound Na groups on pyrolysis and CO2-gasification of alkali lignin[J]. Bioresources, 2011,6(4):4145-4157.
[9] Yang H P, Yan R, Chen H P, et al. Characteristics of hemicellulose, cellulose and lignin pyrolysis[J]. Fuel, 2007,86(12 /13):1781-1788.
[10] 谭洪. 生物质热解机理试验研究[D]. 杭州:浙江大学, 2005. Tan H. Mechanism study of biomass pyrolysis[D]. Hangzhou:Zhejiang University, 2005.
[11] Cetin E, Moghtaderi B, Gupta R, et al. Influence of pyrolysis conditions on the structure and gasification reactivity of biomass chars[J]. Fuel, 2004, 83(16):2139-2150.
[12] Connolly T S. CO2 pyrolysis and gasification of kraft black liquor char[D]. Maine:The University of Maine, 2006.
[13] Liu Q, Wang S, Zheng Y, et al. Mechanism study of wood lignin pyrolysis by using TG-FTIR analysis[J]. Journal of Analytical and Applied Pyrolysis, 2008, 82(1):170-177.
[14] Jiang X G, Li C Y, Wang T, et al. TG-FTIR study of pyrolysis products evolving from dyestuff production waste[J]. Journal of Analytical and Applied Pyrolysis, 2009, 84(1):103-107.
[15] Greenwood P F, van Heemst J D H, Guthrie E A, et al. Laser micropyrolysis GC-MS of lignin [J]. J Anal Appl Pyrol, 2002, 62(2):365-373.
[16] Ferdous D, Dalai A K, Bei S K, et al. Production of H2 and medium Btu gas via pyrolysis of lignins in a fixed-bed reactor [J]. Fuel Processing Technology, 2001, 70(1):9-26.
PDF(1247094 KB)
