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Yang Z, Zhang Y, Zhu X, Mao Y, Wu J, Chen S, Fan R, Yu Z. Torrefaction characteristics of cellulose loaded with boric acid. Carbohydr Res 2023; 523:108709. [PMID: 36368078 DOI: 10.1016/j.carres.2022.108709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 10/07/2022] [Accepted: 10/21/2022] [Indexed: 01/28/2023]
Abstract
To explore the catalytic effect of boric acid on biomass, cellulose loaded with boric acid was roasted by a tubular furnace. The gaseous products were adsorbed by activated carbon and then analyzed by GC-MS. Boric acid was shown to improve the selectivity of the product levoglucosenone (LGO). The effects of the parameters such as boric acid loading, nitrogen flow, and temperature on the torrefaction behavior of cellulose were investigated. In the studied temperature range of 240-420 °C, the yield of LGO first increases and then decreases. In addition, its yield increases directly with increasing nitrogen flow rate. The results show that the highest LGO yield of 6.64% (analytical value) can be obtained under 10% (w/w) boric acid loading, 380 °C and nitrogen flow rate of 65 ml/min conditions.
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Affiliation(s)
- Zhiguang Yang
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China; College of Resources and Environment, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Yaochao Zhang
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China
| | - Xinfeng Zhu
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China
| | - Yanli Mao
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China
| | - Junfeng Wu
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China
| | - Songtao Chen
- Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan, 467036, China
| | - Ruimei Fan
- Department of Physiology and Neurobiology, Sino-UK Joint Laboratory for Brain Function and Injury, Xinxiang Medical University, Xinxiang, 453003, China
| | - Zhisheng Yu
- College of Resources and Environment, Chinese Academy of Sciences, Beijing, 100085, China
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Jie Ling JL, Go ES, Park YK, Lee SH. Recent advances of hybrid solar - Biomass thermo-chemical conversion systems. CHEMOSPHERE 2022; 290:133245. [PMID: 34914949 DOI: 10.1016/j.chemosphere.2021.133245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/19/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Solar biomass hybridization is a promising energy technique for efficient utilization while mitigating the disadvantages associated with both biomass and solar energy source. In conventional concentrating solar power (CSP) systems, the contribution of solar energy is relatively low, merely supplementing the system with low/medium temperature air/steam. This paper aimed to emphasize the improvement of solar heat share, particularly in the topping cycle of the hybrid system. The solar aided processes, either directly generating superheated air/steam or direct gasification are thermodynamically favorable at very high temperatures, in excess of 800 °C. Unfortunately, this temperature is unattainable in conventional CSP systems using molten salt. Accordingly, the integration of solar power tower (SPT) with solid particle fluidized system in a beam down configuration has been proposed for the hybrid solar-biomass systems. Studies of such integration system presented challenges in terms of operating temperature, continuous supply/syngas production and scaling of reactor, particularly for circulating fluidized bed (CFB). The selection of solid particle and gas flow rate are among the governing parameters for high operating temperature and effective utilization of solar heat. The development of high temperature hybrid solar-biomass system is anticipated for higher solar-to-fuel conversion efficiencies, minimizing the direct combustion of biomass and reduce the emission of greenhouse gas (GHG) emissions.
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Affiliation(s)
- Jester Lih Jie Ling
- Department of Mineral Resources and Energy Engineering, Jeonbuk National University, 54897, Jeonju, Republic of Korea
| | - Eun Sol Go
- Department of Environment and Energy, Jeonbuk National University, 567, Bakeje-daero, Deokjin-gu, Jeonju, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea.
| | - See Hoon Lee
- Department of Mineral Resources and Energy Engineering, Jeonbuk National University, 54897, Jeonju, Republic of Korea; Department of Environment and Energy, Jeonbuk National University, 567, Bakeje-daero, Deokjin-gu, Jeonju, Republic of Korea.
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