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Electrolytic reduction of Nantong coal and model compounds with oxygenic functional groups in an aqueous NaCl solution

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Journal of China University of Mining and Technology 2008年第1期18卷 112-115页

作者： ZHAO Wei YAO Li-ping LIN Juan ZONG Zhi-min School of Chemical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Electrolytic reductions of oxygenic functional groups （OFGs） on coal surface and coal model compounds with OFGs in an aqueous NaCl solution are studied by electrochemical methods combined with GC/MS, GC and FFIR analyses. Different electrode reactions, their corresponding potentials and dynamic equations during the processes are investigated. The results show that benzoic acid, benzaldehyde, benzalcohol and hypnone are reduced to benzaldehyde and benzalcohol, methoxybenzene and benzal- cohol, toluene and styrene, respectively, at the cathode. The corresponding electrode potentials and dynamic equations are deter- mined. *** reduction also leads to an increase in the contents of hydroxyl groups and aliphatic moieties and a corresponding decrease in those of carboxyl and carbonyl groups in Nantong coal, a high-sulfur coal, an enhancement in the flotation desulfurization of the coal. ER also reduces organic sulfur and FeS2 in the coal.

关键词： coal model compounds electrolytic reduction dynamic equations

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Hydrogen production via steam reforming of bio-oil model compounds over supported nickel catalysts

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Journal of Energy Chemistry 2015年第3期24卷 299-308页

作者： Huaqing Xie Qingbo Yu Xin Yao Wenjun Duan Zongliang Zuo Qin Qin School of Materials and Metallurgy Northeastern University

The steam reforming of four bio-oil model compounds（acetic acid,ethanol,acetone and phenol） was investigated over Ni-based catalysts supported on Al2O3 modified by Mg,Ce or Co in this *** activation process can improve the catalytic activity with the change of high-valence Ni（Ni2O3,NiO） to low-valence Ni（Ni,NiO）.Among these catalysts after activation,the Ce-Ni/Co catalyst showed the best catalytic activity for the steam reforming of all the four model *** long-term experiment at 700°C and the S/C ratio of 9,the Ce-Ni/Co catalyst still maintained excellent stability for the steam reforming of the simulated bio-oil（mixed by the four compounds with the equal masses）.With CaO calcinated from calcium acetate as CO2 sorbent,the catalytic steam reforming experiment combined with continuous in situ CO2 adsorption was *** the comparison of the case without the adding of CO2 sorbent,the hydrogen concentration was dramatically improved from 74.8% to 92.3%,with the CO2 concentration obviously decreased from 19.90% to 1.88%.

关键词： hydrogen production bio-oil model compounds Ni catalyst CO2capture

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Crosslinking Mechanism of Soy Protein-based Adhesives based on Glyoxal and a Compound of Protein model

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 942-950页

作者：曹龙 LIANG Jiankun ZHANG Qiaoyan XI Xuedong 吴志刚雷洪 Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products Southwest Forestry UniversityKunming650224China College of Civil Engineering Kaili UniversityQiandongnanKaili556011China Zhazuo State-owned Forest Farm Guiyang550299China College of Forestry Guizhou UniversityGuiyang550025China School of Chemistry Materials Engineering Zhejiang A&F UniversityHangzhou311300China

The crosslinking mechanism of glyoxal and asparagine was analyzed,and the relationship between the mechanism and practical performances of soy protein-based adhesives was also *** is shown that when pH=1 and 3,glyoxal reacted with asparagine in the form of major cyclic ether *** pH=5,glyoxal reacted with asparagine in two structural forms of sodium glycollate and cyclic ether ***,amidogens of asparagine were easy to develop protonation under acid *** by the instability of cyclic ether compounds,the reaction activity and reaction degree between glyoxal and asparagine were relatively *** alkaline conditions,glyoxal mainly reacted with asparagine in the form of sodium *** the increase of pH,the polycondensation was more sufficient and the produced polycondensation products were more *** reaction mechanism between glyoxal and asparagine had strong correspondence to the practical performances of the *** solution could develop crosslinking reactions with soy protein under both acid and alkaline *** strength and water resistance of the prepared soy protein-based adhesives were increased *** pH>7,glyoxal had relatively high reaction activity and reaction intensity with soy protein,and the prepared adhesives had high crosslinking density and cohesion strength,showing relatively high bonding strength,water resistance and thermal stability.

关键词： soy protein wood adhesives glyoxal model compounds crosslinking

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