Preparation of Biochar from Straw in Northeast China to Assist in Carbon Neutrality:Data Visualization and Comprehensive Evaluation

Carbon neutrality is an important goal of global energy conservation and emission reduction, and achieving the green and low-carbon technological revolution. The straw biomass in Northeast China is a potential green resource, and its pyrolysis into biochar (BC) is of great significance for carbon neutrality. This study is based on bibliometrics to conduct network co-occurrence analysis on recent BC and carbon neutrality aspects, and uses the AHP + GRA dual evaluation model for index optimization evaluation. The research direction of BC in carbon neutrality in 2023 is more focused on its carbon fixation performance for carbonaceous substances. The carbon fixation index of BC accounts for 0.314 of this layer, which exceeds 30%. GRA is used to evaluate the performance of BC, with the highest correlation between η and C₀-η (1.0), followed by pore diameter, (O + N)/C, O/C, H/C, ash, SA, pore volume, C, and pH_pzc (0.696). In the process of assisting carbon neutrality with straw BC, the focus should be on carbon sequestration performance, while also considering various factors used for preparation. The aim of this study is to optimize the carbon neutrality indicators for evaluating the resource utilization process of solid waste such as straw, in order to provide a fundamental reference for decision-makers in preparing high-value products.