INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Ming Huang,Wei Cai,Liang Zhu,Jie Li,Zhongqing Ma
Kraft lignin (KL), isolated from black liquor, serves as a significant feedstock for the production of bio-aromatics by catalytic fast pyrolysis (CFP). First, the influence of pH on the chemical structure of KL isolated by the gradient acid precipitation (GAP) was investigated. Then, the dual-catalyst CFP (DC-CFP) was employed to convert KL into light aromatics by using the hierarchical Nb 2 O 5 (Hie-Nb 2 O 5 ) and the microporous HZSM-5 as catalyst. Results showed that the decrease of pH during GAP promoted the breakage of the ether bond of KL, resulting in lower molecular weight and less content of hydroxyl group in KL. Among the four types of metal oxides (Hie-Nb 2 O 5 , Al 2 O 3 , MgO, and CaO), the synergistic effect of dual-catalyst grouped by Hie-Nb 2 O 5 and HZSM-5 was best for the production of light aromatics. In addition, the maximum production of light aromatics was reached at the pH of 2 and the mass ratio of Hie-Nb 2 O 5 -to-HZSM-5 at 2:2.
研究领域:
化学工程
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生物质能
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2014
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IF 3.065
Xiangnan Li,Jiale Huang,Zidan Wang,Xinde Jiang,Wencheng Yu,Yanmei Zheng,Qingbiao Li,Ning He
The alkaline extraction and acid precipitation of longan seed phenolic compounds were investigated to develop a more practical process than currently exists to isolate these chemicals. By using an alkaline buffer as the extraction solvent, the yield of total phenols reached 46.86±0.43 mg/g after conventional solid–liquid extraction. Because of the benefit achieved from the preconcentration process, an acid precipitation efficiency of 65.29 ± 0.38% was obtained, and the separation yield of phenols reached 22.04 ± 1.95 mg/g. However, the purity of the phenolic extract was influenced by the presence in the precipitate of proteins and carbohydrates, which both moved together in all four precipitation fractions at different pH values. The FRAP assay and the assay of the radical-scavenging activity revealed the strong antioxidant activity possessed by the phenolic compounds in the precipitate extracts. This preparation process for phenolic compounds has obvious advantages, such as easy operation, safe products and low production cost, which indicated its prospective industrial potential.
研究领域:
食品科学
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植物化学
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产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 7
·784
·
IF 2.9
Qi Liu,Yuqing Cao,Meng Zhou,Zehao Miao,Jinkun Yang,Zhaokai Du,Baoyang Lu,Guiqun Liu,Jianhong Li,Shuai Chen
Before steel can be utilized, pickling is necessary to remove surface oxidation products. However, as the ferrous ion concentration in the pickling solution increases, the pickling rate significantly diminishes, necessitating the treatment of spent pickling solution (SPS) to mitigate its hazardous effects prior to disposal. Current industrial methods predominantly rely on neutralization and precipitation techniques, which are cost-prohibitive and generate substantial by-products, thus failing to meet environmental protection standards. In this study, a new method, which is based on the formation of FeC2O4·2H2O precipitate in a strong acid solution, is proposed to treat the SPS. Initially, the SPS undergoes a two-step impurity removal process, followed by the controlled addition of oxalic acid dihydrate (H2C2O4·2H2O) to precipitate iron. The resulting precipitate is filtered, washed, and vacuum-dried, and the regenerated acid is recycled back into the pickling tank. When 1 g/10 mL of H2C2O4·2H2O is used, the iron removal rate achieves 60%, and the acidity of the regenerated acid increases by 11.3%. X-ray diffraction pattern (XRD) and thermogravimetric–differential scanning calorimetry (TG-DSC) characterization showed that the precipitate was α-FeC2O4·2H2O, with an average particle size of about 3.19 μm and a purity of 95.24%. This process innovatively achieves efficient recycling of acid and iron resources, offering a potential solution to the industrial challenge of difficult SPS treatment in the steel industry and meeting the urgent need for sustainable development.
研究领域:
环境科学
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冶金工程
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
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IF 4.3
Xingyu Lin,Hongsheng Lu,Ruoxin Zhang,Ziteng Yang,Yingjiang Chen,Baiwen Huang
CO 2 flooding offers dual benefits by enhancing oil recovery and facilitating CO 2 storage. However, reservoir heterogeneity and clay swelling can significantly limit CO 2 storage capacity. Here, a novel strategy for in-situ formation of particle profile control agent and clay swelling inhibitor was established by CO 2 -responsive ionic liquids (ILs). Two fatty acid (FA)-based ILs were synthesized by reacting N, N -dimethylcyclohexylamine (DMCHA) with myristic acid (C14) and palmitic acid (C16). After CO 2 injection, FA was precipitated again as a particle profile control agent with a particle size exceeding 10.65 μm, while the protonated DMCHA in the remaining liquid phase serves as a clay swelling inhibitor. Notably, the precipitation of FA within the core increases the CO 2 storage capacity by 1.96 times. This innovative approach holds great promise for enhancing the efficiency and sustainability of CO 2 injection, benefiting both the petroleum industry and environmental protection.
研究领域:
石油工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Xinyu Jiang,Feng Gao,Yongliang Ma,Ning Huo,Yujie Guo,Yali Yu
Protein from tiger nut meal (TNP) performance high nutritional value. This study optimized the extraction parameters for TNP (DES-TNP) using deep eutectic solvent, with HBD: HBA = 5:1, Liquid: Solid = 11:1, and the moisture content was 15 %. A comprehensive comparison was conducted with the protein extracted using alkali-soluble acid precipitation (ASAE-TNP). DES-TNP demonstrated significantly higher purity (76.21 ± 2.59 %) than ASAE-TNP (67.48 ± 1.11 %). Density functional theory confirmed the successful synthesis of DES and its strong interaction with TNP. Moreover, DES-TNP and ASAE-TNP were different in structure (microscopic, secondary, and tertiary) and molecular weight distribution. The discrepancy contributed to the different functional properties, DES-TNP exhibiting better solubility, emulsification and foaming properties at pH13 compared to ASAE-TNP. For nutritional properties, DES-TNP and ASAE-TNP exhibited similar amino acid composition and digestibility, but the total amino acid content of DES-TNP was higher. This study presented a novel method for the extraction and comprehensive utilization of TNP.
研究领域:
食品科学
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营养学
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生物化学
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化工
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产品关联
DOI
PubMed
高影响因子
Food & Function
·
2024
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IF 5.1
Xinyi Li,Qi Tao,Qiuhui Hu,Ning Ma,Gaoxing Ma
Pleurotus eryngii protein is considered high quality protein based on its rich and comprehensive essential amino acids, and has also been proved displaying multiple significant functional characterizations of which vary with its fabrication process. We aimed to investigate the variation differences of P. eryngii protein extracted by alkaline extraction and acid precipitation (AA), cellulase complex alkaline extraction and acid precipitation (CAA), ultrasound assisted alkaline extraction and acid precipitation (UAA), and salt dissolution method (S) from the perspective of gastrointestinal digestion and fecal fermentation consequences. Protein hydrolysis and structural analysis was performed on after in vitro gastrointestinal digestion, and found that AA had the highest hydrolysis degree while CAA had the lowest. The results of fluorescence chromatography and infrared chromatography indicated that the reasons for the digestion difference might be the unfolding degrees of protein tertiary structure and the polysaccharide which was the highly contained component in crude protein and had the opportunity to prevent protein hydrolysis. Metagenomic analysis suggested that compared with other groups, AA had excellent biological functions including regulating obesity and insulin related microbiota. This study could provide new theoretical basis for the P. eryngii protein as a novel type of nutrient and functional component, and contribute to the development of constructing a diversified emerging food protein supply system.
研究领域:
食品科学
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营养学
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微生物学
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蛋白质化学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）