Article
Green & Sustainable Science & Technology
Jie Li, Guozhang Chang, Ke Song, Bolun Hao, Cuiping Wang, Jian Zhang, Guangxi Yue, Shugang Hu
Summary: This study investigated the effect of CBA additives as bed material in gasification process on the characteristics of tar catalytic reforming and biochar/steam gasification reactivity. The results showed that the CBA additive exhibited good catalytic performance for tar cracking and gas upgrading. The addition of CBA reduced the activation energy of the gasification process and improved the reactivity of the biochar.
Article
Chemistry, Physical
Lole Jurado, Vasiliki Papaefthimiou, Sebastien Thomas, Anne-Cecile Roger
Summary: In this study, La-based perovskite-supported Ni materials were synthesized and evaluated for their catalytic performance in tar reforming during biomass gasification. While both Ni/LSCF and Ni-LSCF showed similar catalytic stability and activity in tar reforming, Ni-LSCF exhibited better performance in water gas shift reaction and resistance to coke formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Chemical
Yukun Li, Paul T. Williams
Summary: In this study, high-density polyethylene was pyrolyzed and catalytically steam reformed to produce hydrogen-rich syngas. Different catalyst temperatures and steam inputs were optimized to achieve the highest syngas yield. Polyolefin plastics showed the highest syngas production, with biochar catalyst performing better than RDF char catalyst.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Ningbo Gao, Jamilu Salisu, Cui Quan, Paul Williams
Summary: The gasification of biomass produces syngas for electricity generation and fuels production, but tar generated as a by-product causes issues. Catalytic steam reforming with nickel-based catalysts can convert tar into more syngas efficiently. Research has focused on modifying nickel-based catalysts to improve performance in steam tar reforming.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Applied
Yu Zhang, Qi Shang, Dongdong Feng, Hongliang Sun, Fuhua Wang, Zhichao Hu, Zhenyu Cheng, Zijian Zhou, Yijun Zhao, Shaozeng Sun
Summary: The co-gasification of biomass and coal is a promising method to produce H-2-rich synthesis gas, which is of great significance for carbon-neutrality development in China.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Yishuang Wang, Zhiheng Lu, Mingqiang Chen, Defang Liang, Jun Wang
Summary: Tar formation is a major challenge in biomass gasification, but catalytic steam reforming (CSR) can potentially convert tar into hydrogen. This study successfully prepared a series of NixFeyMn/ATP catalysts and applied them to CSR of toluene, a model tar compound. The addition of trace amounts of Fe and Mn improved the catalyst's stability and activity.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Engineering, Environmental
Bin Xu, Jianjun Xie, Nantao Wang, Yanqin Huang, Huacai Liu, Xiuli Yin, Chuangzhi Wu, Xin Tu
Summary: Steam reforming of toluene was conducted in a DBD plasma reactor with Ni/γ-Al2O3 catalysts. The study investigated the effects of reaction temperature, catalyst calcination temperature, and permittivity of packing materials on the reaction performance and synergistic effect of plasma catalysis. The results showed that toluene conversion initially decreased and then increased with temperature, achieving a high conversion rate of 87.1% at 450°C. Catalysts prepared at lower calcination temperatures or with higher permittivity packing materials exhibited better performance due to larger Ni surface area and higher surface discharge. The study highlighted the potential of this approach for sustainable hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Sweta Singh, Soubhik Kumar Bhaumik, Li Dong, Hari Vuthaluru
Summary: The integration of adsorption treatment in steam catalytic tar reforming using biochar significantly improves the removal of tar components, especially at low temperatures. The two-step process shows substantial removal of light tar compounds, with reforming contributing 40% and adsorption contributing 60% to the overall tar removal.
Article
Energy & Fuels
Guanyi Chen, Xiaoshan Dong, Beibei Yan, Jian Li, Kunio Yoshikawa, Liguo Jiao
Summary: Tar elimination is a bottleneck in the industrial application of gasification, but photothermal catalysis shows potential in improving tar removal efficiency and reducing reaction temperature. Photothermal steam reforming significantly enhances toluene conversion and suppresses carbon deposition and agglomeration, promoting the formation of gaseous products.
Article
Energy & Fuels
Ali Abdelaal, Daniele Antolini, Stefano Piazzi, Francesco Patuzzi, Audrey Villot, Claire Gerente, Marco Baratieri
Summary: Gasification char, a byproduct of biomass gasification, is typically considered as industrial waste and disposed of through incineration or landfilling. However, its high carbon content and surface area make it a cost-effective alternative to common catalysts and catalyst support materials.
Article
Energy & Fuels
Qiang Li, Qian Wang, Yosuke Tsuboi, Jiansheng Zhang, Jizhen Liu
Summary: Steam reforming is an effective method to eliminate tar in the biomass gasification process, as shown in our pilot tests.
Article
Energy & Fuels
Lola Azancot, Luis F. Bobadilla, Miguel A. Centeno, Jose A. Odriozola
Summary: This study presents a comprehensive investigation on the reforming reaction of a simulated producer gas stream. The results show that the addition of potassium can mitigate carbon formation and minimize carbon deposits under appropriate reaction conditions. Based on experimental evidence, the Ni-K catalyst is proven to be an excellent candidate for obtaining clean syngas from producer gas reforming.
Article
Chemistry, Applied
Shuxiao Wang, Jing Gu, Rui Shan, Haoran Yuan, Chen Yong
Summary: This study investigates an effective method for catalytic reforming of toluene using peat char-supported Ni metal to achieve clean gas production. The results suggest that the SiO2 structure plays a significant role in the catalytic process, resulting in high catalytic performance.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Prashanth Reddy Buchireddy, Devin Peck, Mark Zappi, Ray Mark Bricka
Summary: The presence of tars in biomass gasification poses challenges to efficiency and catalyst activity. This study investigated the catalytic activity of montmorillonite and montmorillonite-supported nickel for tar removal, finding that Ni-montmorillonite had a removal efficiency of over 99% for naphthalene.
Article
Energy & Fuels
Shanhui Zhao, Yunliang Zhang
Summary: In this study, the heterogeneous decomposition and steam/CO2 reforming of gasification tar over bio-char were investigated using experimental and density functional theory (DFT) approaches. The results showed that bio-char significantly enhanced the decomposition of toluene. Steam/CO2 reforming improved toluene decomposition efficiency by maintaining the activity of bio-char. DFT calculations revealed the mechanisms and energy barriers involved in the reactions, providing insights into the role of bio-char.
Article
Chemistry, Physical
Hiroki Shimanoe, Takashi Mashio, Koji Nakabayashi, Toshinori Inoue, Maki Hamaguchi, Jin Miyawaki, Isao Mochida, Seong-Ho Yoon
Article
Polymer Science
Jinchang Liu, Hiroki Shimanoe, Seunghyun Ko, Hansong Lee, Chaehyun Jo, Jaewoong Lee, Seong-Hwa Hong, Hyunchul Lee, Young-Pyo Jeon, Koji Nakabayashi, Jin Miyawaki, Seong-Ho Yoon
Article
Chemistry, Multidisciplinary
Koji Nakabayashi, Yoshinori Matsuo, Kazuya Isomoto, Kazunari Teshima, Tsubasa Ayukawa, Hiroki Shimanoe, Takashi Mashio, Isao Mochida, Jin Miyawaki, Seong-Ho Yoon
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Dong-Yeon Ryu, Koji Nakabayashi, Takaaki Shimohara, Ueda Morio, Isao Mochida, Jin Miyawaki, Yukwon Jeon, Joo-Il Park, Seong-Ho Yoon
APPLIED SCIENCES-BASEL
(2020)
Article
Energy & Fuels
Animesh Pal, Kutub Uddin, Bidyut Baran Saha, Kyaw Thu, Hyun-Sig Kil, Seong-Ho Yoon, Jin Miyawaki
Article
Chemistry, Physical
Fengjing Jiang, Weineng Liao, Tsubasa Ayukawa, Seong-Ho Yoon, Koji Nakabayashi, Jin Miyawaki
Summary: Surface treatment with cactus-like carbon nanofibers significantly enhances the conductivity of composite bipolar plates, making them promising candidates for vanadium redox flow batteries with excellent durability and high energy efficiency.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Chairunnisa, N. Takata, K. Thu, T. Miyazaki, K. Nakabayashi, J. Miyawaki
Summary: The study focused on the preparation of activated carbons from dead camphor leaves through conventional steam activation, with potential for efficient water vapor adsorption due to the influence of pore properties.
Article
Chemistry, Multidisciplinary
Fitria Rahmawati, Arikasuci Fitonna Ridassepri, Chairunnisa, Agung Tri Wijayanta, Koji Nakabayashi, Jin Miyawaki, Takahiko Miyazaki
Summary: This study investigated the potential of using activated-carbon derived from bagasse as an adsorbent, with AC700 showing favorable adsorption of methylene blue through physical interaction with an adsorption energy of 3.536 kJ/mol.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Qingyan Cui, Xiaoliang Ma, Koji Nakano, Koji Nakabayashi, Jin Miyawaki, Adel Al-Mutairi, Abdulazeem M. J. Marafi, Ahmed M. Al-Otaibi, Seong-Ho Yoon, Isao Mochida
Summary: The study found that blending heavy atmospheric residues and light AR had a positive synergistic effect on hydrodesulfurization, hydrodenitrogenation, and hydrodeconradson-carbon-residue, but a negative synergistic effect on hydrodeasphaltenes, hydrodevanadium, and hydrodenickel. This synergistic effect was attributed to changes in the aromatics-to-saturates ratio in the blends.
Article
Chemistry, Multidisciplinary
Taegon Kim, Doo-Won Kim, Keiko Ideta, Cho- Park, Jin Miyawaki, Joo-Il Park, Seong-Ho Yoon
Summary: A new experiment using an inverse approach was designed to elucidate the pore structure of super-activated carbon (SAC). The micro-domain structure model successfully explained the mechanisms of intra-particular and inter-particular pores by utilizing various techniques, such as N-2 adsorption/desorption isotherms and electron microscopy.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Hyeonseok Yi, Koji Nakabayashi, Seong-Ho Yoon, Jin Miyawaki
Summary: Activated carbon is produced by physical or chemical activation methods. While physical activation methods are commonly used in industry due to lower production costs, they are less effective compared to chemical activation methods in terms of pore development. A novel pressurized physical activation method is proposed to increase activating agent diffusibility and pore development, resulting in activated carbon with higher specific surface area and unique pore size distribution.
Article
Chemistry, Multidisciplinary
Keiko Ideta, Doo-Won Kim, Taegon Kim, Koji Nakabayashi, Jin Miyawaki, Joo-Il Park, Seong-Ho Yoon
Summary: The study investigated the effect of pore size on the response characteristic of an electric double layer capacitor (EDLC), and found that samples with the largest pore size showed superior capacitance and response frequency characteristics. The presence of micropores and mesopores in the activated carbon facilitated low electrolyte-diffusion resistance during the formation of the electric double layer, leading to fast and stable response frequency.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hyeonseok Yi, Koji Nakabayashi, Seong-Ho Yoon, Jin Miyawaki
Summary: Activated carbon is a suitable adsorbent for ethanol refrigerant adsorption heat pumps (AHPs). Chemically activated carbon with highly developed pore structures has good ethanol adsorption, but it is expensive. Physical activation produces inexpensive activated carbon but with limited pore development. A pressurized physical activation method was developed to produce activated carbon with well-developed pore structure, and it showed comparable or higher ethanol uptake than chemically activated carbon on a weight and volume basis.
Article
Chemistry, Physical
Hiroki Shimanoe, Takashi Mashio, Hideki Nakashima, Seunghyun Ko, Young-Pyo Jeon, Koji Nakabayashi, Jin Miyawaki, Seong-Ho Yoon
Summary: This study closely examined the correlation between the anisotropic texture and (002) molecular stacking property of spinnable mesophase pitch (SMP). It was found that SMP is a specific solution consisting of mesogenic and solvent components, with the mesogenic component composed of a cluster unit of (002) stacked molecular sheets. The anisotropic texture of SMP is strongly correlated with the height of (002) molecular stacking.
Article
Chemistry, Multidisciplinary
Tian Xia, Takeharu Yoshii, Keita Nomura, Keigo Wakabayashi, Zheng-Ze Pan, Takafumi Ishii, Hideki Tanaka, Takashi Mashio, Jin Miyawaki, Toshiya Otomo, Kazutaka Ikeda, Yohei Sato, Masami Terauchi, Takashi Kyotani, Hirotomo Nishihara
Summary: The optimal conditions for facilitating graphene-zipping reactions whilst minimizing graphene stacking processes in highly mesoporous templated carbons were examined. Graphene-zipping reactions occur at temperatures between 1173 and 1873 K, leading to a 1100 fold increase in average graphene-domain size. At temperatures above 2073 K, the carbon framework loses its porosity due to the development of graphene-stacking structures.
