ZSM-5 catalyzed copyrolysis of sugarcane bagasse with LDPE: Influence of microwave-assisted acid pretreatment of sugarca
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ORIGINAL ARTICLE
ZSM-5 catalyzed copyrolysis of sugarcane bagasse with LDPE: Influence of microwave-assisted acid pretreatment of sugarcane bagasse on yield and composition of gasoline range oil Prakash Binnal 1
&
S. Rajashekhara 1 & S. P. Manjunath 1 & Atif Ahmed 1 & Mohammed Tawaf 1 & Anushree Bhat 1
Received: 12 July 2020 / Revised: 5 November 2020 / Accepted: 13 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In the present study, microwave-assisted acid pretreatment (MAAP) was employed to reduce the recalcitrance of sugarcane bagasse (SCB). The pretreated SCB was subjected to catalytic copyrolysis with LDPE in a lab-scale pyrolysis reactor using ZSM5 catalyst. The influence of operating parameters affecting the effectiveness of MAAP (pretreatment time, pretreatment temperature, level of microwave power, and sulfuric acid concentration) on (i) yields of copyrolysis products, (ii) compositions of crude bio-oil, and gasoline range oil (GRO) (a cut obtained by simple distillation of crude bio-oil having boiling point range of 25 to 230 °C) was optimized. Under optimum operating conditions of pretreatment (microwave power, 600 W; sulfuric acid concentration, 1.5 M; pretreatment time, 15 min; pretreatment temperature, 130 °C), the highest crude bio-oil yield of 43.84% and least biochar yield of 17.65% were observed. The crude bio-oil obtained by pretreated SCB (PT SCB) contained 25.63% gasoline range fraction compounds (GRF), which was 1.96 times higher than the corresponding value for untreated SCB (UT SCB). GC HRMS analysis of GRO showed that it contains 33.14% monoaromatic hydrocarbons, 28.87% C5–C12 alkanes, 11.24% C5–C12 olefins, 25.64% oxygenated compounds (including phenols, furans, esters, and other oxygenated compounds), and 1.14% naphthalenes and indanes. The fuel properties of GRO were estimated and found to be reasonably closer to properties of commercial gasoline. Keywords Microwave-assisted acid pretreatment . Copyrolysis . ZSM-5 . Gasoline range fraction compounds . Gasoline range oil
Abbreviations SCB Sugarcane bagasse PT SCB Pretreated sugarcane bagasse UT SCB Untreated sugarcane bagasse MAAP Microwave-assisted acid pretreatment GRF Gasoline range fraction compounds Highlights 1) The influence of microwave-assisted acid pretreatment (MAAP) of sugarcane bagasse on its biochemical composition, elemental composition, and performance during copyrolysis with LDPE was evaluated. 2) Under optimum operating conditions of pretreatment, gasoline range oil (GRO) obtained from copyrolysis of pretreated sugarcane bagasse with LDPE contained 33.14% monoaromatic hydrocarbons. 3) Except flash point and pour point, all other fuel properties of GRO complied closely with standard values for commercial gasoline. * Prakash Binnal [email protected] 1
Department of Chemical Engineering, Siddaganga Institute of Technology, N.H.206, Tumakuru, Karnataka 572103, India
GRO MAHs PAHs LCB NCG CrI LG LDPE
Gasoline range oil Monoaromatic hydrocarbons Polycyclic aromatic hydrocarbo
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