Nickel-catalyzed carbonization of wood for coproduction of functional carbon and fluid fuels II: improved fuel quality of oil fraction and increased heating value of gas fraction |
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Authors: | Kyoko Suzuki Tsutomu Suzuki Yukio Takahashi Mitsuhiro Okimoto Tetsuo Yamada Noriyasu Okazaki Yuichi Shimizu Masashi Fujiwara |
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Institution: | (1) Department of Applied and Environmental Chemistry, Kitami Institute of Technology, 165 Koen-cho, Kitami 090-8507, Japan;(2) Department of Science and Engineering for Materials, Tomakomai National College of Technology, Tomakomai 059-1275, Japan;(3) Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan |
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Abstract: | The yields and properties of oil and gas fractions coproduced during carbonization of larch wood loaded with Ni 2%, Ni 2%+Ca
1%, and Ni 4% and without catalyst (None) at 700°–900°C were examined to clarify the catalytic effect in terms of conversion
into fluid fuels. The net calorific value of oil occurred mainly below 500°C and increased in the order None < Ni 2% < Ni
4% < Ni 2%+Ca 1%, while the yield decreased in this order. The same order held for the production of gases enriched with hydrogen
at 500°–700°C. Even above 800°C, markedly promoted evolution of hydrogen took place for all catalyst systems. These observations
confirmed the effectiveness of nickel-catalyzed carbonization at 900°C, particularly Ni 2%+Ca 1%, for both upgrading of oil
and gaseous fractions, although the quality of oil was not satisfactory. The catalysis of nickel with and without calcium
is discussed on the basis of the modified Broid-Shafizadeh scheme, and the scheme was altered to adapt to the high temperature
region where oil was no longer produced.
Part of this study was presented at the 14th Annual Meeting of the Japan Institute of Energy, Suita, August 2005, and at the
18th Symposium, Session D, of the Materials Research Society of Japan, Tokyo, December 2007 |
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Keywords: | Nickel-catalyzed carbonization Upgraded oil Hydrogen-rich gas Broid-Shafizadeh scheme |
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