Biomass gasification is a thermochemical conversion that uses material decomposition and chemical energy to convert biomass into synthesis gas (syngas) and impurities like tar. There are two methods for reducing tar: primary and secondary methods. Secondary methods that are commonly used are more economical, usually using a condenser or a filter. Filters are currently a frequent research topic because they use adsorption to reduce tar, and rice straw is well-suited for use since it contains silica that adsorbs tar well. In this study, we investigated an indirect water condenser, rice straw filter and combination of them to reduce tar in syngas. The syngas flowrate was the chosen variable with five variations: 72, 96, 120, 144, and 168 l/min. The experimental results indicated the indirect condenser removed tar with the efficiency 69.62% at 72 l/min flowrate and rice straw filter can done in efficiency 65.8% at 120 l/min flowrate. The study also showed that the combined indirect water condenser and rice straw with a syngas flowrate of 120 l/min could achieve a tar reduction efficiency of 84.87%. Both of two methods are implemented for mobile biomass gasifier application, particularly in remote areas.

生物质气化是一种热化学转化，利用材料分解和化学能将生物质转化为合成气（合成气）和诸如焦油的杂质。有两种减少焦油的方法：主要方法和次要方法。常用的辅助方法更经济，通常使用冷凝器或过滤器。过滤器由于使用吸附剂来减少焦油而成为当前的研究热点，并且稻草由于含有能够很好地吸附焦油的二氧化硅，因此非常适合使用。在这项研究中，我们研究了间接水冷凝器，稻草过滤器以及它们的组合以减少合成气中的焦油。合成气流量是具有五个变化的选定变量：72、96、120、144和168 l / min。实验结果表明，间接冷凝器去除焦油的效率为69。流量为72 l / min时为62％，稻草过滤器的流量为12​​0 l / min时效率为65.8％。研究还表明，间接水冷凝器和稻草的组合，合成气流量为12​​0 l / min可以减少84.87％的焦油。两种方法都可用于移动式生物质气化炉，特别是在偏远地区。