In order to improve the product quality and make the process more sustainable, lignin-based char was used as a catalyst during microwave co-pyrolysis of lignin and low density polyethylene (LDPE). Lignin-based char modification using zinc transition metal proved to be beneficial by improving the porosity and selectiveness of the prepared catalyst. General selectivity of lignin-based char catalyst was observed to produce bio-oil with high selectivity of valued compounds. GC/MS analysis proved that the major chemical components of the bio-oil were hydrocarbons, ketones, alcohols, phenols and guaiacols(∼70%). A central composite experimental design (CCD) was used to optimize the product yield and component composition. The optimum condition to produce the highest quantity and quality of bio-oil was 450 °C and 12.5% LDPE/lignin ratio. GC analysis of the syn-gas revealed that the valued compounds were H₂, CO and CH₄, the content of which was about 40%, 20% and 5%, respectively.

为了提高产品质量并使过程更具可持续性，在木质素和低密度聚乙烯（LDPE）进行微波共热解过程中，木质素基炭被用作催化剂。使用锌过渡金属的木质素基焦炭改性通过改善所制备催化剂的孔隙率和选择性被证明是有益的。观察到木质素基炭催化剂的一般选择性产生具有高选择性的有价值化合物的生物油。GC / MS分析证明，生物油的主要化学成分是碳氢化合物，酮，醇，酚和愈创木酚（约70％）。中央复合实验设计（CCD）用于优化产品收率和成分组成。产生最高数量和质量的生物油的最佳条件是450°C和LDPE /木质素比为12.5％。_在图2中，CO和CH ₄的含量分别为约40％，20％和5％。