In this communication, two sets of experimental data on lignin pyrolysis were proposed to design processes for product 

separation through Aspen Plus V12.1. After simulation, a comprehensive analysis was undertaken, encompassing both 

techno-economic evaluations and energy analyses, utilizing Aspen Process Economic Analyzer (APEA) V12 and Aspen 

Energy Analyzer (AEA) V12.1. The initial phase involved the development of processes via molecular distillation, facilitating

components separation. Subsequent modifi cations incorporated liquid–liquid-extraction technique, with a comparative 

assessment of system performances. Techno-economic analysis revealed that, for the fi rst dataset, solvent extraction resulted 

in an 8.9% and 10.3% reduction in total capital cost and equipment cost. Conversely, for the second dataset, one-step solvent 

extraction incurred a 25.0% and 26.0% increase in total capital cost and equipment cost, while two-stage solvent extraction 

led to a more substantial rise of 52.1% and 55.4%. In parallel, energy analysis outcomes indicated that, for the fi rst dataset 

and the fi rst scenario of the second dataset, peak values were observed for heating, with ratios of heating values to the sum 

of cooling and process exchanger values at 55.5, 44.8, and 1.0. In alternate scenarios, cooling values surpassed cumulative 

sum of heating and process exchanger values, yielding ratios of 1.6 and 1.5 for cooling values to the sum of heating and 

process exchanger values.