High selective hydrocarbon and hydrogen products from catalytic pyrolysis of rice husk: Role of the ordered mesoporous silica derived from rice husk ash for Ni-nanocatalyst performance

Pham, Le Kim Hoang and Alsaiari, Mabkhoot and Thao, Bui T. Thu and Hieu, Nguyen Huu and Phuc Hoang Duy, Nguyen and Vo, Dai-Viet N. and Witoon, Thongthai and Nguyen, Van Cuong and Kongparakul, Suwadee and Samart, Chanatip and Trinh, Thanh H. and Al-Gheethi, Adel (2024) High selective hydrocarbon and hydrogen products from catalytic pyrolysis of rice husk: Role of the ordered mesoporous silica derived from rice husk ash for Ni-nanocatalyst performance. Journal of Analytical and Applied Pyrolysis, 178 (106383). pp. 1-11. ISSN 0165-2370. (Published)

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Abstract

This study successfully synthesized ordered mesoporous silica using a sodium silicate solution derived from high-purity silica extracted from rice husk (98.09%), aiming to catalyst support for integrating fast catalytic upgrading of rice husk. The ordered mesoporous silica, including MCM-41 and KIT-6, were synthesized by co-assembly with additional surfactants, consisting of Cetyl trimethylammonium bromide (CTAB) and Pluronic P123, respectively. A series of 10 wt.% Ni on MCM-41 (Ni/HMS1) and KIT-6 (Ni/HMS2) were synthesized via ethylene glycol ultrasound-assisted wetness impregnation, which enhanced bio-oil quality by reducing oxygen compounds. This method also improved NiO reducibility up to 91.41%, with nickel phyllosilicate playing a pivotal role in preventing Ni-metallic sintering during the reduction process. The well-dispersed small Ni particles yielded high Ni performance in deoxygenation. Moreover, the order of pore size and structure of the hexagonal nanochannel structures influenced the selective hydrocarbon products in bio-oil. Ni/HMS1, with smaller pore sizes (3–5 nm), achieved a balanced hydrocarbon composition with aromatic (44.91%) and aliphatic (15.65%) components, while Ni/HMS2, having larger pores (8–10 nm), predominantly contained aromatic hydrocarbons (67.45%). The utilization of a green methodology for extracting high-value silica from biological sources promises to innovate and boost eco-consciousness in all rice husk pyrolysis products.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Hydrogen; Nickel catalyst; Orders-silica; Pyrolysis; Rice husk
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	Faculty of Chemical and Process Engineering Technology Centre for Research in Advanced Fluid & Processes (Fluid Centre)
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	11 Dec 2024 05:29
Last Modified:	11 Dec 2024 05:29
URI:	http://umpir.ump.edu.my/id/eprint/43131
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