期刊
BIOMASS CONVERSION AND BIOREFINERY
卷 8, 期 3, 页码 545-561出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-018-0308-8
关键词
Jatropha oil seed cake; Karanja oil seed cake; Pyrolytic biochar; Activated carbon; Pore characteristics
资金
- Department of Science and Technology, India
- Australia-India Strategic Research Fund (AISRF)
Most of the commercially available pyrolysis plants use fluidized bed technologies where bio-oil is the major product and the biochar produced is combusted for process heat. However, auger-based technologies are now gaining importance because of their small to medium scale of operation and decentralized nature where biochar is obtained as a by-product. One of the factors which may greatly influence the techno-economic viability of such decentralized plants is making high-grade carbon from pyrolytic biochar. In the present study, Jatropha and Karanja oil seed cake-based biochar is obtained as a by-product in a pilot-scale (20 kg/h) direct gas-fired auger pyrolysis process at 500 A degrees C under fast pyrolysis conditions that is originally aimed at maximizing the bio-oil yield. The biochar has low surface area and porosity. To value add to this carbon, downstream physical and chemical activation are carried out in an externally heated laboratory-scale reactor. CO2 activation resulted in the formation of activated carbon with BET surface area up to similar to 200 m(2)/g with marginal improvement in porosity, while K2CO3 activation enhanced the surface area to as high as 2400 m(2)/g along with substantial enhancement of porosity.
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