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Two-step fast microwave-assisted pyrolysis of biomass for bio-oil production using microwave absorbent and HZSM-5 catalyst

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Journal of Environmental Sciences 2016年第7期28卷 240-247页

作者： Bo Zhang Zhaoping Zhong Qinglong Xie Shiyu Liu roger ruan Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota

A novel technology of two-step fast microwave-assisted pyrolysis（f MAP） of corn stover for bio-oil production was investigated in the presence of microwave absorbent（Si C） and HZSM-5catalyst. Effects of f MAP temperature and catalyst-to-biomass ratio on bio-oil yield and chemical components were examined. The results showed that this technology, employing microwave, microwave absorbent and HZSM-5 catalyst, was effective and promising for biomass fast pyrolysis. The f MAP temperature of 500°C was considered the optimum condition for maximum yield and best quality of bio-oil. Besides, the bio-oil yield decreased linearly and the chemical components in bio-oil were improved sequentially with the increase of catalyst-to-biomass ratio from 1：100 to 1：20. The elemental compositions of bio-char were also determined. Additionally, compared to one-step f MAP process, two-step f MAP could promote the bio-oil quality with a smaller catalyst-to-biomass ratio.

关键词： Two-step Microwave Pyrolysis HZSM-5 zeolite catalyst Catalytic upgrading

Non-thermal plasma assisted polymer surface modification and synthesis:A review

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International Journal of Agricultural and Biological Engineering 2014年第2期7卷 1-9页

作者： Cheng Yanling Wang Yingkuan Paul Chen Shaobo Deng roger ruan China University of Mining and Technology Beijing 100083China Department of Bioproducts and Biosystems Engineering University of MinnesotaSaint PaulMN 55108USA Chinese Academy of Agricultural Engineering Beijing 100125China

This article reviews the applications of plasma to polymer surface modification and polymer *** treatment causes changes in morphology,structure and properties of *** polymers are treated using plasma,certain monomers with functional groups can be copolymerized with backbone chain or be loaded on the surface,which would help couple reaction of existing polymer chains,graft monomers onto polymers,immobilize proteins,carry antimicrobial drugs,and enhance cell ***,non-thermal plasma process creates unique properties on polymers which allow improved and expanded applications of polymers in food packaging and biotechnology.

关键词： plasma modification synthesis NTP polymers functional groups

Size matters:small distributed biomass energy production systems for economic viability

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International Journal of Agricultural and Biological Engineering 2008年第1期1卷 64-68页

作者： roger ruan Paul Chen Richard Hemmingsen Vance Morey Doug Tiffany Center for Biorefining Department of Bioproducts and Biosystems EngineeringUniversity of Minnesota1390 Eckles AvenueSt.PaulMN 55108USA Initiative for Renewable Energy and Environment(IREE) University of Minnesota Department of Applied Economics University of Minnesota.

Current large scale biomass energy production systems including cellulosic ethanol,gasification,and pyrolysis facilities face significant technical and economic *** with these large scale systems,small distributed biomass energy production systems(DBEPS)are believed to offer advantages including lower capital costs,lower feedstock costs,simplified transportation and logistics and higher returns for biomass *** compliant technologies are expected to make utilization of regional biomass supplies practical and economically viable in the *** paper presents arguments on the need and importance of DBEPS,available DBEPS options,and an economic scenario of DBEPS implementation on an average size farm in the US.

关键词： renewable energy biomass biorefining pyrolysis thermochemical conversion

Effects of Microwave Torrefaction with Mg（OH）2 on Characteristics of Bio-oil from Co-pyrolysis of Straw Stalk and Soapstock

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China Petroleum Processing & Petrochemical Technology 2019年第3期21卷 10-16页

作者： Wen Pingwei Zhou Yue Dai Leilei Wang Yunpu Liu Yuhuan ruan roger College of Chemistry and Chemical Engineering College of Life ScienceJiangxi Normal UniversityNanchang 330022 Engineering Research Center for Biomass Conversion Ministry of EducationNanchang UniversityNanchang 330047 Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of MinnesotaMN 55108USA

This study investigated the effects of torrefaction with Mg(OH)2 on the properties of bio-oil formed from the microwave-assisted catalytic fast co-pyrolysis of straw stalk and *** effects of torrefaction temperature and residence time on the yield and composition of bio-oil were *** showed that the torrefaction temperature and residence time remarkably influenced the yield and composition of *** the increase in temperature and time,the bio-oil yield and the proportion of oxygen-containing compounds decreased,while the proportion of aromatic compounds *** the feedstocks were subject to torrefaction reaction for 20 min at 260°C,the proportion of oxygen-containing compounds decreased from 29.89%to 16.49%.Meanwhile,Mg(OH)2 could render the deoxidization function of torrefaction process increasingly *** proportion of the oxygen-containing compounds reached a minimum(14.41%),when the biomass-to-Mg(OH)2 ratio was 1:1.

关键词： microwave torrefaction Mg(OH)2 straw stalk soapstock bio-oil

Conversion of Biomass to Hydrocarbon-rich Bio-oil via Microwave-assisted Catalytic Pyrolysis： A Review

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China Petroleum Processing & Petrochemical Technology 2018年第3期20卷 7-16页

作者： Wang Yunpu Zhang Shumeil Yu Zhenting Jiang Lin Liu Yuhuan ruan roger Fu Guiming Nanchang University State Key Laboratory of Food Science and Technology Nanchang 330047 Nanchang University Engineering Research Center for Biomass Conversion Ministry of Education Nanchang 330047 Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota USA

The method for pyrolysis of biomass to manufacture hydrocarbon-rich fuel remains challenging in terms of conversion of multifunctional biomass with high oxygen content and low thermal stability into a high-quality compound, featuring high content of hydrocarbons, low oxygen content, few functional groups, and high thermal stability. This study offers a promising prospect to derive hydrocarbon-rich oil through microwave-assisted fast catalytic pyrolysis by improving the effective hydrogen to carbon ratio(H/Ceff) of the raw materials. The proposed technique can promote the production of high-quality bio-oil through the molecular sieve catalyzed reduction of oxygenated compounds and mutagenic polyaromatic hydrocarbons. This work aims to review and summarize the research progress on microwave copyrolysis and microwave catalytic copyrolysis to demonstrate their benefits on enhancement of bio-oils derived from the biomass. This review focuses on the potential of optimizing the H/Ceff ratio, the microwave absorbent, and the HZSM-5 catalyst during the microwave copyrolysis to produce the valuable liquid fuel. This paper also proposes future directions for the use of this technique to obtain high yields of bio-oils.

关键词： biomass microwave pyrolysis H/Ceff microwave absorbent HZSM-5 catalyst hydrocarbon-rich bio-oil

Color development in an extrusion-cooked model system

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International Journal of Agricultural and Biological Engineering 2008年第2期1卷 55-63页

作者： Hanwu Lei roger ruan R.Gary Fulcher Bernhard van Lengerich Department of Agricultural and Biosystems Engineering South Dakota State UniversityBrookingsSD 57007USA The Department of Bioproducts and Biosystems Engineering University of MinnesotaSt.PaulMN 55108USA Department of Food Science and Nutrition University of MinnesotaSt.PaulMN 55108USA Department of Food Science University of ManitobaWinnipegMBR3T 2N2Canada General Mills Inc.9000 Plymouth Ave.N.Golden ValleyMN 55427USA

Rice-glucose-lysine blend was extruded using a co-rotating twin-screw *** effects of different extrusion conditions on the browning properties of extrudates were analyzed and compared using the CIE Lab system of *** process variables included moisture content,screw speed,barrel temperature,and screw *** influence of product temperature on the browning property of extrudates was significant(P<0.05).The color parameters were related to product temperature by a 4th degree polynomial(P<0.05).Hunter color scale values(L*,a*,b*,-L*a*/b*,Whiteness Index,and Yellowness Index)from extruded samples were analyzed to relate to extrusion process *** temperature and browning properties were modeled and tested at various screw configurations and extrusion *** temperature and browning property models were verified using different screw geometries and other processing conditions with reasonable accuracy.

关键词： twin-screw extrusion browning hunter color scale Maillard reaction empirical modeling

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利用核磁共振技术监测海带湿面贮藏品质

中国食品学报 2015年第5期15卷 254-260页

作者：李妍林向阳吴佳李丹 roger ruan 福州大学生物科学与工程学院福州350108 明尼苏达大学生物制品与工程学院美国圣保罗55108

利用低场核磁共振技术监测2种贮藏条件下海带湿面样品弛豫特性的变化,探讨水分及其迁移变化规律,测定产品质构性质的变化,分析二者的相关性。真空包装的海带湿面样品分别于常温、4℃和-18℃条件下贮藏。以弛豫时间T2、质子密度M2、质构... 详细信息

利用低场核磁共振技术监测2种贮藏条件下海带湿面样品弛豫特性的变化,探讨水分及其迁移变化规律,测定产品质构性质的变化,分析二者的相关性。真空包装的海带湿面样品分别于常温、4℃和-18℃条件下贮藏。以弛豫时间T2、质子密度M2、质构特性为主要指标。监测贮藏期间其品质变化规律。试验结果表明：常温、4℃和-18℃3种贮藏条件下水分迁移及质构特性变化的关键时期依次为28~35,35~42,49~56 d。弛豫特性与质构特性呈显著相关。

关键词：低场核磁共振弛豫时间T2 质子密度M2 质构特性贮藏

Synthesis and characterization of a starch-based cationic flocculant for microalgae harvesting

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International Journal of Agricultural and Biological Engineering 2016年第3期9卷 139-145页

作者： Cheng Yanling Hua Wei Liu Wenhui Wang Wanqing Ye Xiao Li Liang Paul Chen roger ruan Beijing Key Laboratory of Biomass Waste Resource Utilization Biochemical Engineering CollegeBeijing Union UniversityBeijing 100023China Center for Biorefining and Department of Bioproducts and Biosystems Engineering University of Minnesota1390 Eckles AveSt.Paul 55108United States

A process for making a starch-based cationic flocculant for microalgae harvest was studied and the performance of the flocculant was *** substituted cationic starch was prepared by reacting corn starch with glycidyltrimethylammonium chloride(GTAC),during which the hydroxyl groups of anhydroglucose units of the starch were partially substituted by the ammonium groups through *** factors affecting degree of substitution(DS),such as reaction temperature and time,catalyst amount,and the water content were investigated and optimal reaction conditions were *** relationship between DS and microalgae harvest was determined.A batch of cationic starch with optimal DS was synthesized and used for flocculation *** flocculation experiment results showed that,for the original microalgae concentration(dry weight)of 1 g/L,the cationic starch-based flocculants can harvest over 90%of the microalgae in pH from 5 to 10,with the aggregation and precipitation time of 10 min to 30 min,and the mass ratios of flocculants to microalgae of 1:8-1:18(dry mass ratio).Using starch-based flocculant to harvest microalgae in the effluent is not only efficient,but also nontoxic to the water system,which is very important to the effluent reuse and certain microalgae applications.

关键词： microalgae harvest flocculation starch-based cationic flocculants

New Year Greeting from Editor-in-chief

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International Journal of Agricultural and Biological Engineering 2011年第4期4卷 I0001-I0002页

作者： roger ruan University of Minnesota

Dear All,I would like to take this opportunity during the holiday season to express my sincere thanks to our reviewers,authors,readers and section editors,associate editors,and staff *** IJABE,we value your hard work and contributions to advancing agricultural and biological engineering research.I hope to receive your continuous support in the coming year,and I wish you a very happy new year and success in 2012.

关键词： season chief thanks