Novel Catalyst for Cracking of Biomass Tar
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- 作者：Tiejun Wang ; Jie Chang ; Pengmei Lv ; and Jingxu Zhu
- 刊名：Energy & Fuels
- 出版年：2005
- 出版时间：January 2005
- 年：2005
- 卷：19
- 期：1
- 页码：22 - 27
- 全文大小：346K
- 年卷期：v.19,no.1(January 2005)
- ISSN：1520-5029
文摘
Cracking of biomass tar was investigated over Ni/dolomite catalyst prepared by the incipientwetness method using modified dolomite as precursor. Modified dolomite was prepared by mixingFe2O3 powders with natural dolomite powders to increase Fe2O3 content for higher activity oftar cracking. Four other catalysts (natural dolomite, modified dolomite, ICI-46-1, and Z409) weretested and compared with Ni/dolomite catalyst. The effects of temperature, steam-to-carbon, andspace velocity on tar conversion were explored. Ni/dolomite is shown to be very active and usefulfor tar removal. A 97% tar removal is easily obtained at catalyst temperature of 750 
C andspace velocities of 12 000 h-1. The minimum S/C ratio for Ni/dolomite was 2.5 at a catalysttemperature of 750 C to prevent the formation of the coke on the catalyst. No obvious deactivationof catalyst was observed in 60 h on-stream tests. Compared with the Ni-based catalysts (ICI-46-1, Z409), Ni/dolomite catalyst is cheap and has also excellent activity and anticoke ability.
C andspace velocities of 12 000 h-1. The minimum S/C ratio for Ni/dolomite was 2.5 at a catalysttemperature of 750 C to prevent the formation of the coke on the catalyst. No obvious deactivationof catalyst was observed in 60 h on-stream tests. Compared with the Ni-based catalysts (ICI-46-1, Z409), Ni/dolomite catalyst is cheap and has also excellent activity and anticoke ability.