Enhancement of selective monoaromatic hydrocarbon and syngas products from fast pyrolysis of cassava stalks over Co, Mo promoted Ni catalysts
Journal article, 2024
Catalytic fast pyrolysis of cassava stalks has been intriguing as a promising, feasible chemical refinery method in terms of waste-to-energy conversion from cassava cultivation. This study aims to determine the synergetic influence of Mo and Co on Ni catalysts (Ni, Ni–Mo, and Ni–Co) prepared via ultrasonic-assisted incipient wetness impregnation method for catalytic pyrolysis vapor upgrading. The results indicated that Co and Mo enhance the reducibility of NiO and promote weak-to-medium acidity, thereby enhancing Ni's performance. Mono-Ni favors cracking deoxygenation, whereas oxophilicity promoters particularly enhance the oxygen absorbability efficiency to selective deoxygenated production. A fine Ni dispersion on CoNi/SiO2 catalyst was observed to positively affect the production of monoaromatic hydrocarbons (46.10 %), in contrast to those without promoters (21.63 %). This is attributed to an optimal Ni-metallic distribution with a small crystal size of 7.01 nm and a high surface area of 342.6 m2 g−1, highlighting the effectiveness of the promoter-assisted Ni catalyst. Additionally, a high yield of H2 (66.9 %) in non-condensable gas was recorded at 550 °C. The study suggests that a simplified approach to developing Ni-based catalysts could enhance the eco-friendliness of commercial catalysts, thereby facilitating the scale-up of biomass pyrolysis applications.
Cassava stalks
Fast catalytic pyrolysis
Nickel nanocatalyst
Hydrocarbon
Hydrogen
Author
Bui T. Thu Thao
Nguyen Tat Thanh University
Manh Tung Nguyen
Chalmers, Chemistry and Chemical Engineering, Chemical Technology
Nguyen Tat Thanh University
Competence Centre for Catalysis (KCK)
Ponnusamy Senthil Kumar
Pondicherry University
Nguyen Huu Hieu
Vietnam National University
Ho Chi Minh City University of Technology (HCMUT)
Duy Le
Tra Vinh University
Thuy Phuong T. Pham
Vietnam Academy of Science and Technology
Dai Viet N. Vo
King Saud University College of Science
Thongthai Witoon
Kasetsart University
Mohammad Yusuf
Chitkara University
University of Regina
Van Dien Dang
Industrial University of Ho Chi Minh City
Khaled Al-Kahtany
King Saud University College of Science
Ly Tan Nhiem
HCMC University of Technology and Engineering
Le Kim Hoang Pham
Nguyen Tat Thanh University
Journal of the Energy Institute
1743-9671 (ISSN) 17460220 (eISSN)
Vol. 115 101693Subject Categories (SSIF 2011)
Energy Engineering
Chemical Process Engineering
Other Chemical Engineering
DOI
10.1016/j.joei.2024.101693