This study investigated fast microwave-assisted catalytic co-pyrolysis of corn stover and scum for bio-oil production with CaO and HZSM-5 as the catalyst. Effects of reaction temperature, CaO/HZSM-5 ratio, and corn stover/scum ratio on co-pyrolysis product fractional yields and selectivity were investigated. Results showed that co-pyrolysis temperature was selected as 550°C, which provides the maximum bio-oil and aromatic yields. Mixed CaO and HZSM-5 catalyst with the weight ratio of 1:4 increased the aromatic yield to 35.77wt.% of feedstock, which was 17% higher than that with HZSM-5 alone. Scum as the hydrogen donor, had a significant synergistic effect with corn stover to promote the production of bio-oil and aromatic hydrocarbons when the H/Ceff value exceeded 1. The maximum yield of aromatic hydrocarbons (29.3wt.%) were obtained when the optimal corn stover to scum ratio was 1:2.
Bibliographical noteFunding Information:
The study was supported by Grants from Minnesota Environment and Natural Resources Trust Fund, North Central Regional Sun Grant Center at South Dakota State University through a Grant provided by the U.S. Department of Agriculture ( 2013-38502-21424 ) – United States and a Grant provided by the US Department of Transportation, Office of the Secretary ( DTOS59-07-G-00054 ), and University of Minnesota Center for Biorefining.
© 2016 Elsevier Ltd.
- CaO catalyst
- Catalytic co-pyrolysis
- Microwave-assisted system