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Biodiesel production from green seaweed Ulva fasciata catalyzed by novel waste catalysts from Pakistan Steel Industry

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Chinese Journal of Chemical Engineering 2016年第8期24卷 1080-1086页

作者： Abdul Majeed Khan Noureen Fatima Muhammad Shoukat Hussain Kousar Yasmeen research laboratory of bioenergy (RLB) Department of Chemistry Federal Urdu University of Arts Science and Technology Gulshan-e-Iqbal Campus

This research article is based on the biodiesel synthesis from the marine green macroalga Ulva fasciata, collected from the coast of Karachi, Pakistan using new and the most potential waste catalysts from Pakistan Steel *** oil was extracted with n-hexane then it was analyzed by GC, TLC and by the examination of fuel *** metal analysis of catalysts was carried out by chemical tests and flame atomic absorption spectroscopy(FAAS). The thermal treatment of catalysts at 1500–1700 °C during various processes in steel manufacturing industry converted the metals to metal oxides. The presence of CaO, MgO and ZnO in these catalysts made them highly reactive for biodiesel synthesis. The basicity of waste industrial catalysts was calculated to know their basic strength. The transesterification of U. fasciata oil was performed by fast stirring using 9:1 molar ratio of methanol/oil in the presence of seven different waste industrial catalysts for 6 h at 80–100 °C. The solid catalysts were easily separated from product for re-use. In addition, the rate of reaction in the presence of these catalysts was found to be quite feasible. The waste brown dust from the steel converter gave the highest yield(88%) of biodiesel. The production of biodiesel was confirmed by TLC examination and fuel properties in comparison with the ASTM standards.

关键词： Ulva fasciata Waste catalysts Thermal treatment Metal oxides and fuel properties

Protective effects of Rad23 protein on ultraviolet damage to HeLa cells

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Journal of Central South University 2013年第11期20卷 2974-2980页

作者：李秀山张继红赵小英刘选明 State Key laboratory of Chemo/Biosensiny and Chemometrics (bioenergy and Biomaterial research Center College of BiologyHunan University)

Protein Rad23, a nucleotide excision repair factor, mainly involves in repairing the DNA damage from environment, such as UV light. The function of Rad23 protein involved in DNA damage repair from many environmental factors has been studied extensively, but it is not clear from ultraviolet irradiation. To further investigate the photo-protective function of Rad23 protein on HeLa cells damaged from UV light irradiation, firstly, HeLa cells were irradiated by UV light and incubated with the fusion protein of pCold-Rad23, then the cell viability and apoptosis rate were detected by MTT and Hoechst33342/Pl fluorescent staining, respectively. The results show that the recombinant Rad23 protein can protect the HeLa cells from UV irradiation, and inhibit the apoptosis of HeLa cell by UV irradiation.

关键词： Rad23 protein nucleotide excision repair HeLa cell injury

Aromatization and isomerization of methylcyclohexane over Ni catalysts supported on different supports

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Green Energy & Environment 2019年第1期4卷 75-82页

作者： Ye Song Wei Lin Xingcui Guo Linlin Dong Xindong Mu Huiping Tian Lei Wang research Institute of Petroleum Processing SINOPEC CASKey laboratory of Bio-based Materials Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences

In this work, nickel metal supported on different supports(SiO_2, Al_2O_3, ZSM-5) were prepared by spraying nickel nitrate on the supports and calcined at 873 K. Then, they were characterized by XRD, XRF, N_2 adsorption–desorption, NH_3-TPD, MCH-TPD, H_2-TPR, and pyridine-FTIR,and tested as catalysts for the dehydrogenation aromatization and isomerization of methylcyclohexane(MCH) under the conditions of S-Zorb catalytic adsorption desulfurization(T ? 673 K, P ? 1.5 MPa, WHSV ? 5 h^(-1)). The H2-TPR results showed that the interaction of NiO with support decreased in the order of NiO/ZSM-5-Fe < NiO/ZSM-5 < NiO/Al_2O_3< NiO/SiO2. The decrease of the interaction appeared to facilitate the reduction of Ni and therefore to promote the dehydrogenation aromatization of *** was found that a direct correlation existed between the gasoline components yields, cracking activity and the total number of different supports acid sites measured by NH_3-TPD tests. Higher total acidity of ZSM-5 resulted in gasoline loss because of higher cracking activity of MCH. The number of total acid sites of NiO/ZSM-5-Fe decreased and the medium strong Br€onsted acid sites necessary for MCH isomerization increased after the modification of ZSM-5 by iron metal. So, NiO/ZSM-5-Fe exhibited enhanced MCH conversion, aromatic and isomerization yields when compared to NiO/ZSM-5 and other Ni-based catalysts. This study shows that NiO/ZSM-5-Fe catalyst may be possible to be integrated into the S-Zorb system achieving the recovery of the octane number of gasoline.

关键词： Modified ZSM-5 Methylcyclohexane Aromatization Octane number

Morphological,Biochemical and Genetic Analysis of a Brittle Stalk Mutant of Maize Inserted by Mutator

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Journal of Integrative Agriculture 2013年第1期12卷 12-18页

作者： FU Xue-qian FENG Jing YU Bin GAO You-jun ZHENG Yong-lian YUE Bing National Key laboratory of Crop Genetic Improvement/Huazhong Agricultural University Biomass and bioenergy research Centre Huazhong Agricultural University

Mutants on stalk strength are essential materials for the studies on the formation of plant cell *** this study,a brittle stalk mutant of maize,designated as Bk-x,was screened from a Mutator inserted mutant *** the germination and early seedling stage,the mutant plants were indistinguishable from the normal ***,all of the plant organs were brittle after the 5th-leaf stage and remained brittle throughout the rest of the growing *** observation showed that the cell wall in vascular bundle sheath of Bk-x was thinner than that in normal *** leaf mechanical strength in Bk-x was 77.9% of that in normal plants growing at Xishuangbanna（BN）,Yunnan province and that was 61.7% in Wuhan（WH）,Hubei Province,*** proportion of cellulose was 12.3% in Bk-x,which was significantly lower than that in normal plants（26.7%）,while the soluble sugar content was 36.1% in Bk-x,which is significantly higher than that in normal plants（12.4%）.Genetic analysis using two F 2 populations and one F 2：3 families demonstrated that the trait of brittle stalk is controlled by a single recessive gene.

关键词： Mutator cellulose brittle stalk mutant cell wall mechanical strength

A Self-assembled Nanoparticle Platform Based on Amphiphilic Oleanolic Acid Polyprodrug for Cancer Therapy

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Chinese Journal of Polymer Science 2020年第8期38卷 819-829,I0006页

作者： Ying-Sa Wang Gui-Liang Li Shang-Bin Zhu Fan-Chen Jing Run-Dong Liu Sai-Sai Li Jing He Jian-Du Lei Beijing Key laboratory of Lignocellulosic Chemistry Engineering Research Center of Forestry Biomass Materials and Bioenergy(Ministry of Education)Beijing Forestry UniversityBeijing 100083China

Oleanolic acid(OA)is a pentacyclic triterpenoid compound with extensive biological effects,such as anti-inflammatory and anticancer ***,the application of OA in chemotherapy is hampered by its poor solubility and severe adverse *** solve the problems,we developed a self-assembled nanoparticle platform based on amphiphilic oleanolic acid polyprodrug,poly[oligo(ethylene glycol)methyl ether methacrylate]-b-poly(oleanolic acid methacrylate)(POEGMA-b-POAMA),encapsulating 10-hydroxycamptothecin(HCPT)to achieve efficient cancer *** polyprodrug was prepared via reversible addition-fragmentation chain transfer polymerization(RAFT),and could selfassemble to prepare POEGMA-b-POAMA/HCPT nanoparticles(NPs).The obtained nanoparticles exhibited appropriate particle size,excellent drug stability,good drug loading capacity,and high drug loading *** vitro drug release indicated that the drug release was prolonged to 132 *** POEGMA-b-POAMA/HCPT NPs enhanced cell cytotoxicity in 4T1 cells and MCF-7 cells and could be efficiently uptaken by 4T1 ***,in vivo antitumor efficiency showed that the POEGMA-b-POAMA/HCPT NPs had great antitumor efficiency with considerably low adverse effects in the treatment of the 4T1 mouse breast tumor xenograft ***,POEGMA-b-POAMA/HCPT NPs provide great potential as a platform for drug delivery applications.

关键词： Self-assemble Nanoparticle Oleanolic acid Amphiphilic polyprodrug Drug delivery

Biodiesel synthesis via metal oxides and metal chlorides catalysis from marine alga Melanothamnus afaqhusainii

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Chinese Journal of Chemical Engineering 2016年第3期24卷 388-393页

作者： Abdul Majeed Khan Noureen Fatima research laboratory of bioenergy Department of ChemistryFederal Urdu University of ArtsSdence and TechnologyCulshan-e-lqbal CampusUniversity RoadKarachi-75300Pakistan

This research article demonstrates the most comprehensive comparative catalytic study of different metal oxides and metal chlorides towards the methanolysis of triglycerides of marine red macroalga Melanothamnus alhqhusainii. CaO was found to be the most reactive metal oxide that yielded 80% biodiesel while ZnCI2 was the most reactive metal chloride that produced 60% biodiesel by mechanical stirring for 6 h at 100-110 ℃. The overall reactivity order of the catalysts was found to be CaO 〉 MgO 〉 Pb02 〉 ZnC12 〉 TIC14 〉 PbO 〉 HgC12 〉 ZnO 〉 AIC13 〉 SnCI2 〉 TiO2 whereas, CaCI2, MgCI2, A1203, HgO, PbCI2, MnO2, MnC12, Fe203 and FeCI3 were found to be non-reactive for transesterification of triglycerides. In addition, a detailed study of the screening of mobile phases and spraying reagents was conducted which showed that petroleum ether ： chloroform ： toluene （7：2：1 ） is the best mobile phase, whereas iodine crystals/silica gel is the best visualizing agent for the thin layer chroma- tography （TLC） examination ofbiodiesel. Biodiesel production was confirmed by comparative TLC examination. It was further supported by the determination of fuel properties of biodiesel, which were found to be similar to the standard limits of American Society for Testing and Materials （ASTM）,

关键词： Biomass Methanolysis Triglycerides Biodiesel Catalysts

Thermodynamics of glycerol hydrogenolysis to propanediols over supported copper clusters: Insights from first-principles study

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Science China Chemistry 2013年第6期56卷 763-772页

作者： GUAN Jing WANG XiCheng WANG XiaoYan MU XinDong Key laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences

Copper catalysts supported on metal oxides display unique efficiency and selectivity in catalyzing glycerol hydrogenolysis to propanediols. Understanding the reaction at the molecular level is the key to rational design of better catalysts for propanediol synthesis, which is one of the major challenges for glycerol application in energy. In this work, extensive calculations based on periodic density functional theory were carried out to study thermodynamics of glycerol hydrogenolysis over binary model catalysts, including Cu/ZrO2 and Cu/MgO, with the focus to elucidate the competitive reaction pathways to produce the 1,2-propanediol (1,2-PDO) and 1,3-propanediol (1,3-PDO). Our results suggest that the reaction starts with glycerol dehydration on the metal oxide, followed by sequential hydrogenation over metal centers. Based on our explorations on the stabilities of adsorbed reactants, dehydrated intermediates and hydrogenated species along the reaction channels, the DFT calculations show that the 1,2-PDO formation will dominate in comparison to the 1,3-PDO from thermodynamic viewpoint. This is consistent with our experiments where the Cu catalysts seem to give the 1,2-PDO as a main product. The calculations and experiments also indicate that the Cu/MgO exhibits superior activities than Cu/ZrO2 for the hydrogenolysis of glycerol molecules.

关键词： density functional calculations glycerol hydrogenolysis propanediols copper-based catalysts mechanism

Lignin derived porous carbon with favorable mesoporous contributions for highly efficient ionic liquid-based supercapacitors

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Chinese Chemical Letters 2023年第10期34卷 293-297页

作者： Jia Liu Xiu-Wen Mei Feng Peng Beijing Key laboratory of Lignocellulosic Chemistry MOE Engineering Research Center of Forestry Biomass Materials and BioenergyBeijing Forestry UniversityBeijing 100083China

Lignin and its derivatives hold great potential in developing high performance porous carbon materials for supercapacitors due to the versatile features of high carbon content, abundant multifunctional groups,low cost, and environmental benefits. Unfortunately, their derived porous carbon generally has the features of unfavorable microporous-dominated morphologies and low specific surface area(SSA) attributed from the highly-branched structure of lignin, which are hardly suitable for the supercapacitors with ionic liquid(IL) electrolyte, leading to poor energy density and rate capability. Herein, porous carbon materials with desirable mesoporous contributions from sodium lignosulphonate are designed via a facile template method. Such rich mesoporisity carbon materials not only possess with three-dimensional interconnected network, large SSA, as well as favorable pore size distribution for accelerated ion and electron mass transfer, but also feature low heteroatom content for high electrochemical stability. Consequently, the optimal electrode exhibits a high capacitance of 166 F/g at 0.5 A/g, superior rate performance(59 Wh/kg at 59 kW/kg), as well as impressive cycle life with good capacitance retention of 93.1% in EMIBF4 electrolytes. The present work opens a new avenue to design porous carbon materials with high mesopore properties from lignin for effective compatibility with IL electrolyte in high-performance supercapacitors.

关键词： Lignin Porous carbon Favorable mesoporous contributions Low heteroatom content Supercapacitors

Flexible, ultrathin, and multifunctional polypyrrole/cellulose nanofiber composite films with outstanding photothermal effect, excellent mechanical and electrochemical properties

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Frontiers of Chemical Science and Engineering 2023年第8期17卷 1028-1037页

作者： Ya-Ge Zhang Ling-Zhi Huang Qi Yuan Ming-Guo Ma research Center of Biomass Clean Utilization MOE Engineering Research Center of Forestry Biomass Materials and BioenergyBeijing Key Laboratory of Lignocellulosic ChemistryCollege of Materials Science and TechnologyBeijing Forestry UniversityBeijing 100083China

Electrodes that combine energy storage with mechanical and photothermal performance are necessary for efficient development and use of flexible energy storage and conversion *** this study,the flexible,ultrathin,and multifunctional polypyrrole/cellulose nanofiber composite films were fabricated via a one-step“soak and polymerization”*** dense sandwich structure and strong interfacial interaction endowed polypyrrole/cellulose nanofiber composite films with excellent flexibility,outstanding mechanical strength,and desired ***,the polypyrrole/cellulose nanofiber composite film electrodes with quaternary amine functionalized cellulose nanofiber had the highest specific mass capacitance(392.90 F∙g^(–1))and specific areal capacitance(3.32 F∙cm^(–2))than the electrodes with unmodified and carboxyl functionalized cellulose ***,the polypyrrole/cellulose nanofiber composite films with sandwich structure had excellent photothermal conversion *** study demonstrated a feasible and versatile method for preparing of multifunctional composite films,having promising applications in various energy storage fields.

关键词： cellulose nanofiber electrochemical photothermal conversion polypyrrole