Catalytic pyrolysis of biomass wastes over Org-CaO/Nano-ZSM-5 to produce aromatics: Influence of catalyst properties. (December 2019)

• Record Type: Journal Article
• Authors: Yi, Linlin; Liu, Huan; Li, Sihan; Li, Meiyong; Wang, Geyi; Man, Gaozhi; Yao, Hong
• Is Part Of: Bioresource technology. Volume 294(2019)
• Publication Date: 2019-12
• Subjects: CaO/ZSM-5 -- Aromatics -- Pyrolysis -- Bio-oil -- Organic calcium precursors; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.122186
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The BTX production by Org-CaO/NZSM-5 is almost twice as that by conventional CaO/ZSM-5. The proportion of aromatics and BTX with Org-CaO/NZSM-5 were up to 93% and 54%. Org-CaO contributed to BTX formation during dual catalytic pyrolysis. NZSM-5 promoted the conversion of bulky molecules into naphthalenes. Abstract: Catalytic pyrolysis of biomass wastes is a promising way to produce aromatics. Based on the conventional CaO/ZSM-5 system, this study aims to improve the aromatics yields by developing an upgraded system which combined nanosized ZSM-5 with CaO from organic calcium precursors (Org-CaO/NZSM-5). The results showed that the aromatics proportion in bio-oil from pyrolysis of Jatropha de-oiled cake with Org-CaO/NZSM-5 increased to 93%. The corresponding yield of BTX (benzene, toluene and xylene) and naphthalene was around 70% which was almost twice than that with conventional CaO/ZSM-5. Org-CaO showed better thermal cracking ability and deoxygenation with more hydrocarbons intermediates and higher H/Ceff of vapors, contributing to enhanced formation of BTX over NZSM-5. NZSM-5 contained much more mesopores and acid sites on external surface, promoting higher conversion of bulky molecules into naphthalenes. Compared with peanut shell, corncob and bagasse pyrolysis, Jatropha de-oiled cake pyrolysis produced much higher aromatics with Org-CaO/NZSM-5.