Experimental investigation and performance evaluation of Samanea saman leaves and twigs gasification from urban residential garden waste as alternative future energy

Urban residential garden waste offers a valuable biomass resource , but its energy potential is often underutilized. This research investigates the gasification potential of Samanea saman leaves and twig pellets for energy production. Gasification experiments were conducted using a fixed-bed updraft gasifier with air as the gasifying medium. Experiments covered equivalent ratios (ER) ranging from 0.185 to 0.314 and temperatures ranging from 500 °C to 816 °C. Gas composition, energy yield, tar content, and biomass and char morphology were evaluated. The gasification of S. saman pellets yielded syngas with hydrogen content between 7.00 % and 7.40 % vol, indicating good energy potential. Twig pellets demonstrated higher carbon conversion efficiency (65.0 % to 70.6 %) and cold gas efficiency (26.5 % to 30.3 %) compared to leaf pellets. This exploration highlights the potential of S. saman gasification for effective urban garden waste management and renewable energy generation . • Samanea saman leaves and twigs as urban residential garden waste were valorized by gasification • Twig pellets have higher cellulose while leaf pellets have higher lignin content. • Twig pellets gasification produce syngas with higher CO content • Lower ER on Leaf pellets gasification produced higher H 2 • Tar generated from the gasification consists of aromatic and heterocyclic hydrocarbons