Mechanism of Palm Oil Waste Pyrolysis in a Packed Bed
详细信息 查看全文
- 作者：Haiping Yang ; Rong Yan ; Hanping Chen ; Dong Ho Lee ; David Tee Liang ; and Chuguang Zheng
- 刊名：Energy & Fuels
- 出版年：2006
- 出版时间：May 2006
- 年：2006
- 卷：20
- 期：3
- 页码：1321 - 1328
- 全文大小：381K
- 年卷期：v.20,no.3(May 2006)
- ISSN：1520-5029
文摘
To better understand the process mechanism, pyrolysis of palm oil wastes was investigated at differenttemperatures in a packed bed, with focus on the changing of chemical structure and physical characteristics ofsolid residues and gas-releasing properties. First, three palm oil wastes were pyrolyzed with temperatureincreasing from the ambient to 1000 
C, and the main products from it were solid charcoal, liquid oil, andhydrogen-rich gas. The gas component mainly consisted of H2, CO2, CO, and CH4 together with trace C2H4and C2H6. CO and CO2 evolved out at lower temperature (<450 C), while H2 released at higher temperature(600-700 C). Second, the decomposition property of biomass shell was analyzed at variable temperatures(300, 400, ..., 1000 C). The pyrolysis products were thoroughly identified using various approaches (includingmicro-GC, FTIR, GC-MS, ASAP2010, SEM, and CNHS/O analyzer) to understand the influence of temperatureon product properties and, thus, reaction mechanism involved. Starting from low temperature at 300 C, COand CO2 evolved out easily because of the breaking of carbonyl and carboxyl functional groups, and thereleasing of CH4 increased at the price of CH alkyl breaking and diminishing. Following that, at temperature> 400 C, aromatic rings broke gradually with a lot of H2 evolving out. Meanwhile, a large amount of poresin the biomass sample were opened in the course of pyrolysis, and the Brunauer-Emmett-Teller (BET) surfacearea increased greatly. The maximum yield of oil was achieved at 500 C, and it is a mixture of acid, ether,phenol, etc. High temperature (>700 C) was favorable for the evolving of hydrogen-rich gases, while mediumtemperature (500-600 C) was recommendable for a higher generation of liquid oil and charcoal with a largeBET surface area and fine pore size.
C, and the main products from it were solid charcoal, liquid oil, andhydrogen-rich gas. The gas component mainly consisted of H2, CO2, CO, and CH4 together with trace C2H4and C2H6. CO and CO2 evolved out at lower temperature (<450 C), while H2 released at higher temperature(600-700 C). Second, the decomposition property of biomass shell was analyzed at variable temperatures(300, 400, ..., 1000 C). The pyrolysis products were thoroughly identified using various approaches (includingmicro-GC, FTIR, GC-MS, ASAP2010, SEM, and CNHS/O analyzer) to understand the influence of temperatureon product properties and, thus, reaction mechanism involved. Starting from low temperature at 300 C, COand CO2 evolved out easily because of the breaking of carbonyl and carboxyl functional groups, and thereleasing of CH4 increased at the price of CH alkyl breaking and diminishing. Following that, at temperature> 400 C, aromatic rings broke gradually with a lot of H2 evolving out. Meanwhile, a large amount of poresin the biomass sample were opened in the course of pyrolysis, and the Brunauer-Emmett-Teller (BET) surfacearea increased greatly. The maximum yield of oil was achieved at 500 C, and it is a mixture of acid, ether,phenol, etc. High temperature (>700 C) was favorable for the evolving of hydrogen-rich gases, while mediumtemperature (500-600 C) was recommendable for a higher generation of liquid oil and charcoal with a largeBET surface area and fine pore size.