Oil palm biomass is a readily available raw material for production of green chemicals such as levulinic acid and ethanol. One of the major problems on the conversion of this biomass into valuable chemicals is limited accessibility for catalysts and enzymes to penetrate inside the cellulosic materials of the biomass. Furthermore, the presence of lignin may affect the efficiency of the conversion process due to the recalcitrance nature of the lignin. This paper highlights several pretreatment methods to improve the production of valuable substances from oil palm biomass including reducing sugars and derivatives. A well-designed pretreatment method is essential to enhance the effectiveness of subsequent conversion process into high-value chemicals. This paper attempts to provide an insight into the advantages and disadvantages of all pretreatment methods on oil palm biomass. The review focuses also on the efficiencies of different pretreatments on the hydrolysis reaction of oil palm biomass.

油棕生物质是生产绿色化学品（如乙酰丙酸和乙醇）的一种容易获得的原材料。该生物质转化成有价值的化学物质的主要问题之一是催化剂和酶渗透到生物质的纤维素材料内部的可及性有限。此外，由于木质素的顽固性，木质素的存在可能影响转化过程的效率。本文重点介绍了几种预处理方法，这些方法可以改善油棕生物质中有价值的物质的生产，包括还原糖和衍生物。设计良好的预处理方法对于提高后续转化为高价值化学品的效率至关重要。本文试图深入了解所有预处理方法对油棕生物量的优缺点。该综述还着重于不同预处理对油棕生物质水解反应的效率。