Purbo, Suwandono and Widya, Wijayanti and Nova Ridiyanto, Ismail and Dzulfikar Johan, Akbar The Effect of Biomass Ratio and Cao/Si Catalyst On Hydrogen Production from Corncob–Wood Pellet Gasification. Jurnal Polimesin, 23 (6). pp. 829-836. ISSN 2549-1999

Suwandono, Purbo and Widya, Wijayanti and Ismail, Nova Investigasi Tar Reforming pada Co-Gasifikasi Multilayer Plastik–Pelet Kayu dengan Katalis Dolomit–Abu Terbang untuk Peningkatan Kualitas Synga. Universitas Widya Gama.

Ahmad, Yani and Widya, Wijayanti and Mega Nur, Sasongko and Slamet, Wahyudi and Purbo, Suwandono and Musyaroh, Musyaroh Synergistic Co-Pyrolysis of Polyethylene Terephthalate and Hibiscus Rosa-Sinensis: Catalytic Mechanisms for Optimizing Pyrolysis Yields. South African Journal of Chemical Engineering, 53 (1). pp. 281-302. ISSN 2589-0344

Purbo, Suwandono and Widya, Wijayanti and Nova Ridiyanto, Ismail and Dzulfikar Johan, Akbar and Muhammad, Reza Syngas Quality Improvement in Corncob Updraft Gasification Using Cao/Activated Carbon Palm Fiber Catalyst. Eastern-European Journal of Enterprise Technologies, 2 (6). pp. 36-59. ISSN 1729-3774