Kyushu University Academic Staff Educational and Research Activities Database
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Hayashi Jun-ichiro Last modified date:2018.06.07

Professor / Department of Applied Science for Electronics and Materials
Department of Advanced Device Materials
Institute for Materials Chemistry and Engineering

Graduate School
Undergraduate School
Other Organization
Administration Post
Director of the Institute for Materials Chemistry and Engineering

Introduction of the laboratory (Laboratory of Microprocess Control, Division of Advanced Device Materials, Institute of Materials Chemistry and Engineering) .
Academic Degree
PhD., Engineering
Field of Specialization
Chemical Reaction Engineering
Outline Activities
(1) Research on conversion/utilization of carbonaceous resources and development of carbonaceous materials at Institute for Materials Chemistry and Engineering (2009-)
(2) Education of chemical engineering and chemical reaction engineering at Interdisciplinary Graduate School of Engineering Sciences(2009-)
(3) Research and education of Engineering Sciences of Carbon Resources Utilization at Research & Education Center of Carbon Resources(2009-2017)
(4) Research carbonaceous resource conversion and carbon recycling technologies at Trans-disciplinary Research and Education Center of Green Technology (2018-)
(5) Promotion of Global COE Program (Novel Carbon Resource Sciences) (2009-2012)
(6) Promotion of Program for Leading Graduate Schools Advanced Graduate Course in Global Strategy for Green Asia ) (2012-)
(7) Activities in academic societies (eg., Director of Energy Division of The Society of Chemical Engineers, Japan (2007-2009), Member of Advisory Board of Energy & Fuels (an American Chemical Society Journal), 2010-present), Chair of Committee for Post-Vision of Society of Chemical Engineers, Japan (2011-2012), A Director of The Society of Chemical Engineers, Japan (2015-2017), etc.
(8) Activities as an expert of chemical engineering (eg., member of committees in organizations such as Ministry of Economy, Trade and Industry, Japan (METI), and New Energy and Industrial Technology Development Organization, Japan (NEDO), a project leader of an R&D project on advanced integrated coal gasification combined cycles)
(9) Participation of R&D of industrial processes (eg., R&D projects on biomass or coal gasification for power generation or energy/material co-production)
Research Interests
  • 1. Studies on pyrolysis, reforming and gasification of carbonaceous resources toward establishment of sustainable carbon cycle chemistry
    1.1. Analysis/modeling of detailed chemical kinetics, simulation of conversion of carbonaceous resources and reactor design
    1.2. Development of sequential thermochemical conversion of carbonaceous resources for coproduction
    1.3. Thermochemical conversion of carbonaceous resources utilizing nano-sized and sun-nano-sized spaces
    1.4. Low temperature gasification of solid fuel with maximized chemical energy recovery
    1.5. Coproduction of power and secondary (upgraded) carbon resource from fossil fuels and biomass
    1.6. Smart chemical production system based on biomass utilization and conversion
    1.5. Development of method for producing high-quality carbonized solids and carbon materials from low-rank coal and biomass
    1.6. Development of pyrolysis and catalytic pyrolysis methods for chemicals production
    keyword : Carbon resource conversion, coproduction, carbon neutral/negative, hydrogen, chemical production, gasification, pyrolysis, carbonization, process design, reaction mechanism, reaction kinetics, fossil fuels,biomass
Current and Past Project
  • Design of Biomass Pyrolysis Process for Production of Tar-free Active Biochar
  • Production of metallurgical coke with high reactivity and strength from low rank carbonaceous solid
  • Development of advanced methods for converting low rank solid fuels into syngas, feedsctok for coke, binder and specialty chemicals by catalytic/noncatalytic reaction processes in sub
  • This work aims at experimental proof of biomass pyrolysis at temperature up to 500 C with full recycling of heavy oil and resulting selective production of light-oil, in other words, that of bio-oil that contains no or little evaporation residue.
  • Main purpose of this project is (1) to clarify characteristics of primary pyrolysis of pulverized coal and subsequent secondary reactions of nascent char and volatiles in CO2-containing atmosphere at temperature ranging from 1000 - 1300 degree-C and (2) to predict such characteristics by a model considering detailed chemical kinetics and mechanism.
  • Main purpose of this project is to develop a process that is applicable to conversion of various types of woody/herbaceous biomass resources into clean carbonized solids (biochar) and tar-free/H2-rich syngas by means of Pyrocoking method.
  • This project aims to develop elemental technologies such as low temperature coal gasification, novel reactor systems with high-density/high-velocity particles circulation, chemical recuperation of heat from gas-turbines/SOFC, which are indispensable to the next-generation coal gasification combined cycle power generation.
Academic Activities
1. Kudo Shinji, Yasuyo Hachiyama, Yuka Takashima, Junya Tahara, Idesh Saruul, Koyo Norinaga, Hayashi Jun-ichiro, Catalytic Hydrothermal Reforming of Lignin in Aqueous Alkaline Medium, Energy & Fuels, 10.1021/ef401557w, 28, 1, 76-85, 2014.01, This paper proposes catalytic hydrothermal reforming (CHTR) for producing substitute natural gas (SNG) directly from a lignin in aqueous alkaline media, which can fully dissolve the lignin but stabilize it, lowering the reactivity toward water. Among catalysts preliminarily tested, activated-carbon-supported ruthenium (Ru/AC) catalysts showed the highest activity in terms of reduction of the total organic carbon concentration (TOC) in the aqueous solution. CHTR of a lignin was performed employing a 5000 ppm TOC solution of 0.1 M Na2CO3 in a continuous reactor. The presence of Na2CO3 in the solution enabled delivery of the lignin, which is poorly soluble in water, to the reactor as well as suppression of char formation during CHTR. A Ru/AC showed its ability to maintain 98.6% conversion of the lignin at 350 °C even under the alkaline environment for a duration of at least 10 h, with colorless effluent liquid containing 70 ppm TOC of organic carbon. A low content of Ru in the Ru/AC resulted in an insufficient yield of gas because of the deposition of a portion of the lignin as coke over the catalyst, while 20 wt % Ru was enough for the full conversion into gas composed mainly of CH4, with cold gas efficiency (CGE) of 100.4% on a higher heating value (HHV) basis. The resulting aqueous solution of Na2CO3 was ready to be reused for CHTR after removal of carbonate ions derived from the lignin by aeration..
2. Hayashi Jun-ichiro, Kudo Shinji, Hyun-Seok Kim, Koyo Norinaga, Sou Hosokai, Koichi Matsuoka, Sou Hosokai, Low temperature Gasification of Biomass and Lignite: Consideration of Key Thermochemical Phenomena, Rearrangement of Reactions, and Reactor Configuration, Energy & Fuels, 10.1021/ef401617k , 28, 1, 4-21, 2014.01, This paper discusses gasification of solid fuels, such as biomass and lignite, at temperatures well below 1000 °C, which potentially realizes a loss of chemical energy (LCE) smaller than 10% but encounters difficulty in fast and/or complete solid-to-gas conversion in conventional reactor systems. First, key thermochemical and catalytic phenomena are extracted from complex reactions involved in the gasification. These are interactions between intermediates (i.e., volatiles and char), catalysis of inherent and extraneous metallic species, and very fast steam gasification of nascent char. Second, some ways to control the key phenomena are proposed conceptually together with those to rearrange homogeneous/heterogeneous reactions in series/ parallel. Third, implementation of the proposed concepts is discussed assuming different types of gasifiers consisting of a single- fluidized bed, dual-fluidized bed, triple-bed circulating fluidized bed, and/or fixed (moving) bed. The triple-fluidized bed can attain gasification with a LCE as small as 10% by introducing enhancement and/or elimination of the key phenomena and another way to recuperate heat from gas turbine and/or fuel cells (i.e., power generators in gasification combined cycles) into chemical energy of fuel gas. A particular type of fixed-bed gasifier is proposed, which is separated from a pyrolyzer to realize not only control of the key phenomena but also temporal/spatial rearrangement of exothermic and endothermic reactions. This type of gasifier can make a LCE smaller than 4%. Even a conventional single-fluidized bed provides simple and effective gasification, when tar-free/reactive char is used as the fuel instead of parent the one and contributes to a novel integrated gasification fuel cell combined cycles with a theoretical electrical efficiency over 80%..
1. Zayda Faizah Zahara, Shinji Kudo, Ashik U.P.M., Koyo Norinaga, Jun-ichiro Hayashi, CO2 gasification of sugarcane bagasse: Quantitative understanding of kinetics and catalytic roles of inherent metallic species, 6th Sino-Australian Symposium on Advanced Coal and Biomass Utilization Technologies, 2017.12.
2. Hayashi Jun-ichiro, Kudo Shinji, Hyunseok Kim, Koyo Norinaga, Koichi Matsuoka, Sou Hosokai, Low Temperature Gasification of Biomass and Lignite: Consideration of Key Thermochemical Phenomena, Rearrangement of Reactions, and Reactor Configuration, 4th (2013) Sino-Australian Symposium on Advanced Coal and Biomass Utilization Technologies, 2013.12.
3. Kudo Shinji, Yasuyo Hachiyama, Yuka Takashima, Junya Tahara, Idesh Saruul, Hayashi Jun-ichiro, Catalytic Hydrothermal Reforming of Lignin in Aqueous Alkaline Medium, 4th (2013) Sino-Australian Symposium on Advanced Coal and Biomass Utilization Technologies, 2013.12.
4. Hayashi Jun-ichiro, Production of metallurgical coke from lignite and biomass, Carbon Saves the Earth 2013 (CSE2013), 2013.11.
Membership in Academic Society
  • The Society of Chemical Engineers, Japan
  • The Iron and Steel Institute of Japan (ISIJ)
  • The Japan Institute of Energy
  • Best Paper Award in The Second International Symposium on Gasification and Its Application (iSGA 2011) Coproduction of Clean Syngas and Iron From Woody Biomass and Natural Goethite Ore. Shinji Kudo, Keigo Sugiyama, Koyo Norinaga, Chun-Zhu Li, Tomohiro Akiyama, Jun-ichiro Hayashi
  • The following paper has been recognised in the "Top-75 most cited articles" as published in the IChemE journals 2006 - 2009:

    Gasification of low-rank solid fuels with thermochemical energy recuperation for hydrogen production and power generation
    J.-I. Hayashi S. Hosokai N. Sonoyama
    Process Safety and Environmental Protection, Volume 84, Issue 6 B (2006), Pages 409-419
  • Prof. Jun-ichiro Hayashi (Kyushu University) and Dr. Hiroyuki Uesugi (Biocoke Lab., Co. Ltd) have developed a technology for effectively converting biomass into tar-free gaseous and solid fuels, which is named Pyrocoking. The primary step of Pyrocoking is low-temperature rapid pyrolysis of biomass which produces the tar-free solid fuel (Biochar) and pyrolysis gas. The pyrolysis gas that contains tar vapor with a concentration as high as 900,000 mg/Nm3-dry is then reformed over a type of nanoporous soild such as Biochar, active alumina and nanoporous natural iron oxide. The tar vapor is quickly decomposed into light gases and carbon deposit (Biocoke). Biocoke can be used as smokeless clean solid fuel in ways similar to that for Biochar. Moreover, Biocoke-laden partially reduced iron ore is available as a type of raw material in local steel industry. Clean gas from the reforming contains tar with a concentration below 100 mg/Nm3-dry and directly available in IC engine cogeneration.
    Thus, Pyrocoking produces Biomass-derived carbonized solids and power/heat simultaneously.
  • Formation of Carbon Nano-Capsules during Rapid Pyrolysis and Subsequent Steam Gasification of Brown Coal
  • Modeling of Effect of Volatile Matter Cloud on Heterogeneous Ignition of Single Coal Particles
  • Analytical Studies on Degradation of Coal Macromolecules and Development of a Lattice Model
  • Studies on methods for tracing and controlling of flash coal pyrolysis
Educational Activities
1. Lecture of the following subjects:
(a) Fundamentals of Chemical Reaction Engineering (Dept. Applied Science for Electronics and Materials)
(b) Overview of Science and Engineering of Molecular-Based Materials II (Dept. Applied Science for Electronics and Materials)
(c) Advanced Topics of Environment III (Kyushu University Global COE: Novel Carbon Resource Sciences)
(d) Industrial Chemistry II (Inorganic Chemistry, Dept. Chem. Eng. faculty of Engineering)
(e) Physical Chemistry (Advanced Graduate Program in Global Strategy for Green Asia)
(f) Advanced Chemical Reaction Engineering (Advanced Graduate Program in Global Strategy for Green Asia)
(g) Others
2. Supervision of master/PhD-course students through research
3. Supervision of research students (including those from other universities)
4. Core member of a Kyushu University Global COE Program: Novel Carbon Resource Sciences
5. Vice-Coordinator of a Kyushu University Leading Graduate School Program: Advanced Graduate Program in Global Strategy for Green Asia
Professional and Outreach Activities
• Proposals of novel concept of carbonaceous resource conversion and processes/systems, national projects (including incubation ones)
• Collaboration mainly with Asian/Oceanian universities/institutes toward development of novel processes for biomass/coal conversion.