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Catalytic destruction of tar in biomass derived producer gas

机译：催化破坏生物质产生的煤气中的焦油

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The purpose of this study is to investigate catalytic destruction of tar formed during gasification of biomass, with the goal of improving the quality of the producer gas. This work focuses on nickel based catalysts treated with alkali in an effort to promote steam gasification of the coke that deposits on catalyst surfaces. A tar conversion system consisting of a guard bed and catalytic reactor was designed to treat the producer gas from an air blown, fluidized bed biomass gasifier. The guard bed used dolomite to crack the heavy tars. The catalytic reactor was used to evaluate three commercial steam reforming catalysts. These were the ICI46-1 catalyst from Imperial Chemical Industry and Z409 and RZ409 catalysts from Qilu Petrochemical Corp. in China. A 0.5-3 l/min slipstream from a 5 tpd biomass gasifier was used to test the tar conversion system. Gas and tar were sampled before and after the tar conversion system to evaluate the effectiveness of the system. Changes in gas composition as functions of catalytic bed temperature, space velocity and steam/TOC (total organic carbon) ratio are presented. Structural changes in the catalysts during the tests are also described.
机译：这项研究的目的是研究生物质气化过程中形成的焦油的催化破坏，目的是提高生产气的质量。这项工作集中在用碱处理的镍基催化剂上，以促进沉积在催化剂表面的焦炭的蒸汽气化。设计了由保护床和催化反应器组成的焦油转化系统，以处理来自鼓风流化床生物质气化炉的生产气。防护床使用白云石将重焦油打碎。催化反应器用于评估三种商用蒸汽重整催化剂。这些是帝国化学公司的ICI46-1催化剂和中国齐鲁石化公司的Z409和RZ409催化剂。来自5 tpd生物质气化炉的0.5-3 l / min的滑流用于测试焦油转化系统。在焦油转化系统之前和之后对气体和焦油进行采样，以评估该系统的有效性。提出了气体组成随催化床温度，空速和蒸汽/ TOC（总有机碳）比的变化。还描述了测试过程中催化剂的结构变化。

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