Improving hydrocarbon yield from catalytic fast co-pyrolysis of hemicellulose and plastic in the dual-catalyst bed of CaO and HZSM-5

Kuan Ding; Zhaoping Zhong; Jia Wang; Bo Zhang; Liangliang Fan; Shiyu Liu; Yunpu Wang; Yuhuan Liu; Daoxu Zhong; Paul Chen; Roger Ruan

doi:10.1016/j.biortech.2018.03.138

Improving hydrocarbon yield from catalytic fast co-pyrolysis of hemicellulose and plastic in the dual-catalyst bed of CaO and HZSM-5

Bioresour Technol. 2018 Aug:261:86-92. doi: 10.1016/j.biortech.2018.03.138. Epub 2018 Apr 5.

Authors

Kuan Ding¹, Zhaoping Zhong², Jia Wang³, Bo Zhang², Liangliang Fan⁴, Shiyu Liu¹, Yunpu Wang⁵, Yuhuan Liu⁵, Daoxu Zhong⁶, Paul Chen¹, Roger Ruan⁷

Affiliations

¹ Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, United States.
² Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
³ Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China; Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, United States.
⁴ Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, United States; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
⁵ Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
⁶ Jiangsu Provincial Academy of Environmental Science, Nanjing, Jiangsu 210036, China.
⁷ Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, United States; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China. Electronic address: ruanx001@umn.edu.

PMID: 29654998
DOI: 10.1016/j.biortech.2018.03.138

Abstract

The high concentration of oxygenated compounds in pyrolytic products prohibits the conversion of hemicellulose to important biofuels and chemicals via fast pyrolysis. Herein a dual-catalyst bed of CaO and HZSM-5 was developed to convert acids in the pyrolytic products of xylan to valuable hydrocarbons. Meanwhile, LLDPE was co-pyrolyzed with xylan to supplement hydrogen during the catalysis of HZSM-5. The results showed that CaO could effectively transform acids into ketones. A minimum yield of acids (2.74%) and a maximum yield of ketones (42.93%) were obtained at a catalyst to feedstock ratio of 2:1. The dual-catalyst bed dramatically increased the yield of aromatics. Moreover, hydrogen-rich fragments derived from LLDPE promoted the Diels-Alder reactions of furans and participated in the hydrocarbon pool reactions of non-furanic compounds. As a result, a higher yield of hydrocarbons was achieved. This study provides a fundamental for recovering energy and chemicals from pyrolysis of hemicellulose.

Keywords: Catalytic fast co-pyrolysis; Dual-catalyst bed; Hemicellulose; LLDPE; Upgraded bio-oil production.

MeSH terms

Biofuels
Catalysis
Hot Temperature
Hydrocarbons / metabolism*
Plastics*
Polysaccharides*

Substances

Biofuels
Hydrocarbons
Plastics
Polysaccharides
hemicellulose