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Research on Improving the Fuel Properties of Black Liquor by Organic Pretreatment Combined with Catalytic Electrolysis
Received:June 08, 2024  
DOI：10.11980/j.issn.0254-508X.2024.09.018
Key Words:organic pretreatment  catalytic electrolysis  energy saving and efficiency improvement  fuel properties  black liquor
Fund Project:广西自然科学基金（2020JJA160061）；广西博世科环保科技股份有限公司国家企业技术中心开放基金项目（GXU-BFY-2020-031）。
Author NameAffiliationPostcode
WANG Yang School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LI Bolun School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
WANG Mengyan School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LI Kaina School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LUO Huixiang School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
YIN Yongjun* School of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
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Abstract:In this study， the weak black liquor （BL） obtained from sulfate pulping was taken as raw material， based on the organic pretreatment and catalytic electrolysis techniques， the organic small molecule components and lignin in the BL， and recover alkali were separated. Then， lignin was depolymerized into hydrocarbon fuels in order to improve the fuel properties of the BL. The results showed that about 98% alkali and 89.1% total lignin could be recovered by the process of organic pretreatment combined with catalytic electrolysis technology， and the liquefaction rate of lignin after electrochemical reduction treatment could reach up to 95.0%. The calorific value of black liquor upgraded fuel （BLUF-3） reached 35.1 MJ/kg， which was increased by 132% compared with that of the BL， and it had low apparent activation energy （23.4 kJ/mol） and high pre-exponential factor （2.68×106 min-1） which made it easier to ignite and burn. When the temperature was 123.52 ℃， BLUF had the maximum combustion rate of 10.8%/min， and its combustion characteristic index was higher than that of BL and other biomass oils， with high flammability.
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