Insight into Tar Formation Mechanism during Catalytic Pyrolysis of Biomass over Waste Aluminum Dross
Source abstract
Abstract
Tar is one of major products from biomass pyrolysis. Its formation mechanism in a catalytic pyrolysis system comprising pine sawdust and waste aluminum dross (AD) is investigated with the aid of analytical methods including thermogravimetric analysis (TG), Nuclear Magnetic Resonance (NMR), electron paramagnetic resonance (EPR), and gas chromatography coupling with mass spectrometry (GC-MS). The results show that AD plays a vital role in cleavage of C-O bonds to enhance selective formation of furans, ketones, and phenols. The catalytic pyrolysis is initiated by active C-O-M intermediate formation that accelerates C-O bond cleavage and generates great amounts of free radicals to 1020 spins/g at 300–500 °C. Compared with pure pine pyrolysis, the percentage of glucosidic bonds from cellulose decreases from 14.00% to 9.66% at 500 °C; the etherified guaiacyl is more actively ruptured and disappears at 700 °C. Furans and ketones increase from 17.45% to 22.23% and 6.71% to 10.80% at 500 °C, respectively. Phenols increase from 66.75% to 71.57%. The preferential production of higher value-added products via catalytic pyrolysis between biomass and industrial wastes may bring new insight to the simultaneous valorization of agricultural, municipal, and industrial waste.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Thermochemical Biomass Conversion Processes · Bauxite Residue and Utilization · Coal and Its By-products
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
Jiangsu Key Laboratory of Process Enhancement & New Energy Equipment Technology, Nanjing University of Technology, Nanjing 211816, China
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Innovation Academy for Green Manufacture, Chinese Academy of Sciences Beijing, Beijing 100190, China
Funding
Natural Science Foundation of China · National Key R&D Program of China · Natural Science Foundation of Colleges in Jiangsu Province · Changzhou applied basic research plan · Research Foundation for Advanced Talents of and Changzhou University · Mid Long-Term Development Strategy research on Engineering Technology of China
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