Valorization of bio-oil distillation residue via co-pyrolysis and gasification with Moso bamboo: Pyrolysis mechanism, gasification prediction, and ash deposition simulation

• Bio-oil distillation residue (DR) inhibited co-pyrolysis and increasing the residual mass. • Spectral and mass analyses elucidated the evolution characteristics of pyrolysis gases. • Co-pyrolytic char retained a porous structure with 439.49 m2/g surface area. • Co-gasification synergy was accurately predicted by artificial neural network (MSE≤ 6.022e-5). • DR with 47.21% SiO 2 mitigated ash deposition, driving a shift to S-type slag.