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Tuning the selectivity of natural oils and fatty acids/esters deoxygenation to biofuels and fatty alcohols:A review

Green Energy & Environment 2023年第3期8卷 722-743页

作者： Yingdong Zhou Javier Remon Zhicheng Jiang Avtar S.Matharu changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengduSichuan 610064China Instituto de Carboquímica CSICZaragoza50018Spain Department of Biomass Science and Engineering Sichuan UniversityChengdu610064China National Engineering Research Center of Clean Technology in Leather Industry Sichuan UniversityChengdu610064China Green Chemistry Centre of Excellence Department of ChemistryUniversity of YorkHeslingtonYorkYO105DDUK

The chemical transformation of natural oils provides alternatives to limited fossil fuels and produces compounds with added value for the chemical *** selective deoxygenation of natural oils to diesel-ranged hydrocarbons,bio-jet fuels,or fatty alcohols with controllable selectivity is especially attractive in natural oil feedstock *** review presents recent progress in catalytic deoxygenation of natural oils or related model compounds(e.g.,fatty acids)to renewable liquid fuels(green diesel and bio-jet fuels)and valuable fatty alcohols(unsaturated and saturated fatty alcohols).Besides,it discusses and compares the existing and potential strategies to control the product selectivity over heterogeneous *** research conducted and reviewed has only addressed the production of one category;therefore,a new integrative vision exploring how to direct the process toward fuel and/or chemicals is urgently ***,work conducted to date addressing the development of new catalysts and studying the influence of the reaction parameters(e.g.,temperature,time and hydrogen pressure)is summarized and critically discussed from a green and sustainable perspective using efficiency indicators(e.g.,yields,selectivity,turnover frequencies and catalysts lifetime).Special attention has been given to the chemical transformations occurring to identify key descriptors to tune the selectivity toward target products by manipulating the reaction conditions and the structures of the ***,the challenges and future research goals to develop novel and holistic natural oil biorefineries are *** a result,this critical review provides the readership with appropriate information to selectively control the transformation of natural oils into either biofuels and/or value-added *** new flexible vision can help pave the wave to suit the present and future market needs.

关键词： Natural oil Deoxygenation Controllable selectivity Biofuels Fatty alcohols

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Recent advances in the catalytic pyrolysis of biomass

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Frontiers of Chemical Science and Engineering 2011年第2期5卷 188-193页

作者： changwei hu Yu YANG Jia LUO Pan PAN Dongmei TONG Guiying LI Key Laboratory of Green Chemistry and Technology(Ministry of Education) College of ChemistrySichuan UniversityChengdu 610064China

Biomass is considered as a renewable and alternative resource for the production of fuels and chemicals,since it is the only carbon and hydrogen containing resource that we canﬁnd in the world except for fossil resources,capable of being converted to *** pyrolytic liquefaction of biomass is a promising way to convert biomass to useful *** paper brieﬂy surveys the present status of the direct catalytic pyrolysis for the liquefaction of *** direct use of catalysts could decrease the pyrolysis temperature,increase the conversion of biomass and the yield of bio-oil,and change the distribution of the pyrolytic liquid products then improve the quality of the bio-oil *** fact that biomass is in solid state present great challenges for its conversion and for the effective use of catalysts due to the bad heat transfer characteristics and bad mass transfer *** barriers appeal for the development of a new catalyst and new catalytic process as well as the integration of *** design and process intensiﬁcation are of signiﬁcant importance in the catalytic conversion of biomass.

关键词： biomass liquefaction catalysis bio-oil pro-cess intensiﬁcation

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Effect of methane co-feeding on the selectivity of ethylene produced from oxidative dehydrogenation of ethane with CO_2 over a Ni-La/SiO_2 catalyst

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Journal of Energy Chemistry 2013年第4期22卷 653-658页

作者： Xiaoxi Peng Jianqiang Zhu Lu Yao changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan University

A Ni-La/SiO2 catalyst was prepared through the incipient wetness impregnation method and tested in the oxidative dehydrogenation of ethane （ODHE） with CO2. The fresh and used catalysts were characterized by XRD and SEM techniques. The Ni-La/SiO2 catalyst exhibited catalytic activity for the oxidative dehydrogenation of ethane, but with low ethylene selectivity in the absence of methane. The selectivity to ethylene increased with increasing molar ratio of methane in the feed. The carbon deposited on the catalyst surface in the sole ODHE with CO2 was mainly inert carbon, while much more filamentous carbon was formed in the presence of methane. The filamentous carbon was easy to be removed by CO2, which might play a role in improving the conversion of ethane to ethylene. The introduction of methane might affect the equilibrium of the CO2 reforming of ethane and the ODHE with CO2. As a consequence, the synthesis gas produced from CO2 reforming of methane partly inhibited the reaction of ethane and promoted the ODHE with CO2, thus increasing the selectivity of ethylene.

关键词： ethane methane CO2 co-activation Ni-La/SiO2 ethylene selectivity

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Efficient production of biodiesel from both esterification and transesterification over supported SO^(2-)_4–MoO_3–ZrO_2–Nd_2O_3/SiO_2 catalysts

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Journal of Energy Chemistry 2015年第4期24卷 463-471页

作者： Xiuqin Li Dongmei Tong changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan University

SO2-4–Mo O3–Zr O2–Nd2O3/Si O2（SMZN/Si O2） catalysts for the production of biodiesel via both esterification and transesterification were prepared and characterized by N2adsorption-desorption isotherms,X-ray diffraction（XRD）,scanning electron microscopy（SEM）,thermogravimetry analysis（TGA）,ammonia adsorption Fourier transform infrared spectra（NH3-FTIR）,and ammonia adsorption temperature programmed desorption（NH3-TPD） to reveal the dependence of the stable catalytic activity on calcination time. The reason for catalyst deactivation was also studied. The calcination time remarkably affected the types of active centers on SMZN/Si O2-2,and 4 h was found to be the optimal calcination time. SO4 species bonded with small size Zr O2 were found to be the stable active centers,where the leaching of SO2-4and the deposition of coke were inhibited. The deposition of coke was easier on large size Zr O2 than on small size ones. Calcination in air flow could eliminate the deposited coke to recover the deactivated catalysts.

关键词： Biodiesel SMZN/SiO2solid acids Stable active centers Small size ZrO2

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Effect of CO_2 on the structural variation of Na_2WO_4/Mn/SiO_2 catalyst for oxidative coupling of methane to ethylene

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Journal of Energy Chemistry 2015年第4期24卷 394-400页

作者： Jia Shi Lu Yao changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan University

In this work,the influence of CO2 on the structural variation and catalytic performance of Na2WO4/Mn/Si O2 for oxidative coupling of methane to ethylene was investigated. The catalyst was prepared by impregnation method and characterized by XRD,Raman and XPS techniques. Appropriate amount of CO2 in the reactant gases enhanced the formation of surface tetrahedral Na2WO4 species and promoted the migration of O in MOx,Na,W from the catalyst bulk to surface,which were favorable for oxidative coupling of methane. When the molar ratio of CH4/O2/CO2 was 3/1/2,enriched surface tetrahedral Na2WO4 species and high surface concentration of O in MOx,Na,W were detected,and then high CH4 conversion of 33.1% and high C2H4 selectivity of 56.2% were obtained. With further increase of CO2 in the reagent gases,the content of active surface tetrahedral Na2WO4 species and surface concentration of O in MOx,Na,W decreased,while that of inactive species（Mn WO4 and Mn2O3） increased dramatically,leading to low CH4 conversion and low C2H4 selectivity. It could be speculated that Na2WO4 crystal was transformed into Mn WO4 crystal with excessive CO2 added under the reaction conditions. Pretreatment of Na2WO4/Mn/Si O2 catalyst by moderate amount of CO2 before OCM also promoted the formation of Na2WO4 species.

关键词： Oxidative coupling of methane CO2 C2H4 Na2WO4/Mn/SiO2catalyst Structural variation

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Fractional pyrolysis of Cyanobacteria from water blooms over HZSM-5 for high quality bio-oil production

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Journal of Energy Chemistry 2014年第6期23卷 732-741页

作者： huijuan Li Linling Li Rui Zhang Dongmei Tong changwei hu Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University

Fractional pyrolysis and one-step pyrolysis of natural algae Cyanobacteria from Taihu Lake were comparatively studied from 200 to 500 ℃. One-step pyrolysis produced bio-oil with complex composition and low high heating value （HHV〈30.9 MJ/kg）. Fractional pyrolysis separated the degradation of different components in Cyanobacteria and improved the selectivity to products in bio-oil. That is, acids at 200 ℃, amides and acids at 300 ℃, phenols and nitriles at 400 ℃, and phenols at 500 ℃, were got as main products, respectively. HZSM-5 could promote the dehydration, cracking and aromatization of pyrolytic intermediates in fractional pyrolysis. At optimal HZSM-5 catalyst dosage of 1.0 g, the selectivity to products and the quality of bio-oil were improved obviously. The main products in bio-oil changed to nitriles （47.2%） at 300 ℃, indoles （51.3%） and phenols （36.3%） at 400 ℃. The oxygen content was reduced to 7.2 wt% and 9.4 wt%, and the HHV was raised to 38.1 and 37.3 MJ/kg at 300 and 400 ℃, respectively. Fractional catalytic pyrolysis was proposed to be an efficient method not only to provide a potential solution for alleviating environmental pressure from water blooms, but also to improve the selectivity to products and obtain high quality bio-oil.

关键词： Cyanobacteria fractional pyrolysis product selectivity bio-oil HZSM-5

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装配式预制产品生产管控协同平台

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机电工程技术 2024年第8期53卷 131-140页

作者：吴善浒帅岗李奋洲吴凡胡常伟郑桐邱俊豪中建三局第一建设安装有限公司广东深圳518110 广东工业大学机电工程学院工业工程系广州510006

针对以项目为齐套目标的装配式预制产品的制造企业生产管理控制困难的问题,利用因果分析法从数据信息、进度反馈等4个方面切入分析生产效率低下的原因;使用价值链分析法进行价值活动分析,判断当前生产增值与非增值流程,简化非增值不可... 详细信息

针对以项目为齐套目标的装配式预制产品的制造企业生产管理控制困难的问题,利用因果分析法从数据信息、进度反馈等4个方面切入分析生产效率低下的原因;使用价值链分析法进行价值活动分析,判断当前生产增值与非增值流程,简化非增值不可避免流程;运用TFD分析下单方和机电预制生产加工厂方信息传递流程;最后运用5WIH、ECRS工业工程工具对信息传递流程进行优化分析。最后搭建业务管控整体框架,提出项目业务全程数字化、下单模板规范化、工序标准化、移动端便捷报工、数据统计分析等解决方案。该解决方案改变了传统依靠电话、纸质报表等人工方式传递信息的形式,对生产业务全流程进行了优化,大幅提高了工作效率,打通了项目方和生产方的数据壁垒,提高了各类生产信息传递的及时性和准确性,实现生产执行全过程的反馈和跟踪,使施工现场的项目需求和项目接收、生产制造业务紧密衔接。进一步通过多维度数据可视化统计,为企业强化管控力度和判断发展趋势提供数据参考。

关键词：装配式预制产品项目式生产进度跟踪建筑行业信息化

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Structural and electronic effects boosting Ni-doped Mo_(2)C catalyst toward high-efficiency C-O/C-C bonds cleavage

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Journal of Energy Chemistry 2022年第12期75卷 109-116,I0004页

作者： Xiangze Du Jinjia Liu Dan Li hui Xin Xiaomei Lei Rui Zhang Linyuan Zhou huiru Yang Yan Zeng hualong Zhang Wentao Zheng Xiaodong Wen changwei hu Key Laboratory of Green Chemistry and Technology College of ChemistrySichuan UniversityChengdu 610064SichuanChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina National Energy Center for Coal to Liquids Synfuels China Co.LtdBeijing 101400China Department State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of ScienceDalian 116023LiaoningChina Department of Chemistry University of HelsinkiA.I.Virtasen Aukio 1P.O.Box 5500014Finland

The selective cleavage of C-O and C-C is facing a challenge in the field of *** the present work,we studied the influence of doped Ni on the structure and electronic properties,as well as the selective C-O/C-C bond cleavages in the hydrodeoxygenation of palmitic acid over Ni-Mo_(2)C *** catalytic activity on Ni doped Mo_(2)C with TOF of 6.9×10^(3)h^(-1)is much superior to intrinsic Mo_(2)C catalyst,which is also higher than most noble metal ***,the doped Ni raises the active particle dispersion and the coordination numbers of Mo species(Mo-C and Mo-O),improves the graphitization degree to promote the electron transfer,and increases the amount of Lewis and Br?nsted acid,which are responsible for the excellent hydrodeoxygenation *** Ni promotes simultaneously C-O and C-C bonds cleavage to produce pentadecane and hexadecane owing to the increase of electron-rich Mo sites after Ni *** findings contribute to the understanding of the nature of Ni-doped Mo_(2)C on the roles as catalytic active sites for C-O and C-C bonds cleavage.

关键词： Ni-doped Mo_(2)C Palmitic acid Hydrodeoxygenation C-O/C-C bond cleavages Biofuel

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Molecularly engineered lignin to polyphenol via organocatalysis as an active sunscreen ingredient

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Journal of Bioresources and Bioproducts 2024年第2期9卷 197-210页

作者： Yuanlong Guo Pengcheng Liu Lei Deng changwei Lui Michael North Gang hu Qitian huang Zongbao Kent Zhao Haibo Xie Department of Polymeric Materials&Engineering Guizhou UniversityGuiyang 550025China KZJ New Materials Group Guizhou Co.Ltd. Guizhou 551200China Green Chemistry Centre of Excellence Department of ChemistryUniversity of YorkYork YO105DDUK Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China

Phenolation is one of the effective strategies to synthesize lignin-based polyphenols,improve lignin’s properties,and extend its value-added applications in biological,medicinal and cosmetic ***,by taking the structural feature advantage of lignin,an effective and green strategy was developed to molecularly engineer lignin into a robust lignin-3-(2-hydroxyphenyl)propionate ester(LPPE)derivative via a transesterification reaction between 3,4-dihydrocoumarin(DHC)and the aliphatic hydroxyls in lignin under *** strategy is optimized and the novel derivative was systematically characterized by ^(1)H,^(13)C and ^(31)P nuclear magnetic resonance(NMR)and Fourier transform infrared(FT-IR)*** findings indicated that the successful introduction of 3-(2-hydroxyphenyl)propionate groups using a OH groups/DHC/organic base mo-lar ratio of 1꞉1꞉0.3 at 120℃ for 6 h increased the content of phenolic hydroxyl groups from 1.7931 to 3.0179 mmol/g,and the LPPE exhibited excellent ultraviolet-absorbing and antioxidant per-formance with up to 90%free radical scavenging activity within 20 min using 5 mg/mL of *** addition,good biocompatibility and a high Sun protection factor(SPF)value of 40.9 were achieved at 5%(w)dosage of LPPE in the cream,indicating its significant application potential in sunscreen.

关键词： Phenolation of lignin Organocatalysis 3,4-dihydrocoumarin Antioxidant Sunscreen cream

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Advance in the synthesis of aromatic amine via direct animation

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Chinese Science Bulletin 2002年第23期47卷 1937-1939页

作者： Tong Chen changwei hu Zhenjing Fu Anmin Tian

Arylamines are very common and important organic molecules. Acting as important intermediates in medical and chemical industry, they are widely used in the synthesis of Pharmaceuticals, dyes, pesticides, rubber additives, isocyanates and heterocyclic compounds. The traditional methods for the synthesis of arylamines include several steps. The production of aniline, for example, includes the following steps: the production of nitro-benzene by the nitration of benzene, and the reduction of the

关键词： aromatic benzene heterocyclic aniline animation amination pesticides rubber additives steps

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