Tar is the main impurity derived from biomass gasification which causes environmental hazards as well as technical problems in advanced power generation applications. Removal of tar to acceptable tolerance limits for Internal Combustion (IC) engines and fuel cells is one of the major limitations and considered the main obstacle to the wide commercial power generation using biomass producer gas. If tar is not removed to the required levels, it will condense at low temperatures and result in clogging and fouling of engines. Even though physical tar removal at low temperatures has been performing effectively with the technical and economical point of view, there is still need to explore new and more efficient tar removal techniques. In this work, compression of producer gas in a compressor is introduced as a tar cleaning mechanism of biomass tar. Compressor was exposed to low tar levels in the range of 138–312 ± 31 mg Nm⁻³ after the cooling and pre-cleaning system. The results demonstrate the effectiveness of the compression process in reducing tar by 84.4± 1.2% and 83± 1.1% when compressed to 0.8 MPa_g and 0.2 MPa_g respectively at ambient temperature. The blue colour flare after the compression indicates the clean producer gas from tar and corresponds to the total tar levels around and below 30 mg Nm⁻³ with negligible particulates in the producer gas as compared to the orange flare before the compression. It was found that tar condenses inside the compressor receiver tank. A mechanism explaining the condensation of tar in the compression process is proposed.

焦油是源自生物质气化的主要杂质，会导致环境危害以及高级发电应用中的技术问题。将焦油去除至内燃机（IC）和燃料电池的可接受公差极限是主要限制之一，并且被认为是使用生物质产生器气体进行大规模商业发电的主要障碍。如果焦油未去除到要求的水平，它将在低温下凝结并导致发动机堵塞和结垢。即使从技术和经济角度出发，在低温下进行物理焦油去除已有效地进行了，但仍需要探索新的和更有效的焦油去除技术。在这项工作中，作为生物质焦油的焦油清洁机理，引入了在压缩机中压缩生产气的方法。冷却和预清洁系统后的⁻³。结果表明，当在环境温度下分别压缩至0.8 MPa _g和0.2 MPa _g时，压缩过程可有效降低焦油84.4±1.2％和83±1.1％。压缩后的蓝色火炬表示来自焦油的清洁煤气，与压缩前的橙色火炬相比，对应于30 mg Nm ^-3左右及以下的总焦油含量，且煤气中的颗粒物可忽略不计。发现焦油在压缩机储油罐内凝结。提出了一种解释压缩过程中焦油凝结的机理。