Article
Chemistry, Multidisciplinary
Takahiro Murakami, Hajime Yasuda
Summary: This study clarified the components of tar generated in syngas during steam gasification of lignite at 873K, with aromatic compounds being the majority. The tar components included both polycyclic aromatic hydrocarbons without substituent groups, as well as aromatic compounds with substituents such as methyl groups. In addition, regular patterns were observed among many of the tar components.
Review
Green & Sustainable Science & Technology
Naresh Hanchate, Sudha Ramani, C. S. Mathpati, Vishwanath H. Dalvi
Summary: Biomass gasification is a widely explored research area for synthetic gas production. Dual fluidized bed gasifiers are a recent technology capable of producing medium heating value syngas.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Patrik Elbl, Marek Balas, Martin Lisy, Hana Lisa
Summary: The gasification process of sewage sludge and digestate was investigated in a pilot-scale fluidized bed gasifier. These by-products are commonly used as fertilizers, but their usage is restricted due to the presence of heavy metals, pathogens, and bacteria. Gasification of these by-products proved to be more efficient as the produced syngas can be used for combined heat and power generation. Analysis of the syngas and tar revealed that the gasification process can be operated at 750 degrees C without ash slagging, and steam addition improved the tar reduction.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Laura Santamaria, Marcel Beirow, Felix Mangold, Gartzen Lopez, Martin Olazar, Max Schmid, Zhenshan Li, Gunter Scheffknecht
Summary: Fluidized bed fast pyrolysis of wood pellets and solid recovered fuel pellets was conducted to analyze the influence of reactor temperature and fuel type on product distribution. The study revealed that fuel characteristics significantly affected the composition and yield of gases, char, and tar, providing insights for deriving pyrolysis sub-models for fluidized bed gasification modeling.
Article
Energy & Fuels
Takahiro Murakami
Summary: Research on reducing tar in lignite gasification using porous alumina particles as a tar adsorbent showed an increase in gas yields and identified polycyclic aromatic hydrocarbons as the main components of tar. The application of porous alumina particles was more effective under steam gasification conditions, enhancing gasification reactions.
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2021)
Article
Thermodynamics
Jong-Woo Kim, Yong-Seong Jeong, Joo-Sik Kim
Summary: This study investigated the two-stage air gasification of wood pellets using active carbon as a catalyst. The results showed that smooth gasification could be achieved at around 600 degrees C, producing a producer gas with a similar gas quality to high-temperature gasification. Active carbon demonstrated excellent performance in removing tar and increasing H2 production.
Article
Chemistry, Applied
Lin Li, Shuai Tong, Lunbo Duan, Changsui Zhao, Zhipeng Shi
Summary: By comparing chars produced under different atmospheres, it was found that the pore structure and specific surface area of chars are significantly affected by the gasification environment, while the presence of chemical groups has a minor impact on the chars. The best gasification reactivities were obtained on the chars produced under 50%CO2/50%N2 and 50%H2O/50%N2 atmospheres, largely influenced by the porosity of the chars.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Sung Jin Park, Seong Hye Son, Jin Woo Kook, Ho Won Ra, Sang Jun Yoon, Tae-Young Mun, Ji Hong Moon, Sung Min Yoon, Jae Ho Kim, Yong Ku Kim, Jae Goo Lee, Do-Yong Lee, Myung Won Seo
Summary: Converting rice husk into energy through gasification is a promising method for generating renewable energy and reducing greenhouse gas emissions. Research has shown that under specific gasification conditions, tar in the produced gas can be efficiently removed and used to drive gas engines.
Article
Thermodynamics
Si Woo Han, Jeong Jae Lee, Diyar Tokmurzin, Seok Hyeong Lee, Ji Young Nam, Sung Jin Park, Ho Won Ra, Tae-Young Mun, Sang Jun Yoon, Sung Min Yoon, Ji Hong Moon, Jae Goo Lee, Young-Min Kim, Young Woo Rhee, Myung Won Seo
Summary: The study investigated the air gasification properties of SRF with high content of residual mixed waste plastic in a lab scale bubbling fluidized bed gasifier. The results showed that gas yield increases and tar yield decreases as the operating temperature and air-to-fuel equivalence ratio (ER) increases, with changes in the concentration of various gases in the gas product. The H2/CO ratio increases with rising temperature and decreases with rising ER, while carbon conversion efficiency (CCE) and cold gas efficiency peak at 800 degrees C and ER of 0.25.
Article
Energy & Fuels
Katia Gallucci, Andrea Di Giuliano, Sergio Rapagna
Summary: The study conducted continuous gasification tests on a mixture of lignite and solid recovered fuel, evaluating the effects of different operating conditions on syngas quality, tar reduction effectiveness, and H2/CO molar ratio improvement. Results showed that gasification with a SRF/lignite mixture at 800 degrees C was feasible, with the best outcomes achieved using a SRF/lignite ratio of 0.2 wt/wt.
Article
Agricultural Engineering
Bijan Hejazi
Summary: In this study, a novel heat integration alternative for biomass gasification is proposed, which involves cooling the syngas to near-ambient temperature using an indirect water condenser. A one-dimensional kinetic model is developed and validated against experimental data to demonstrate the feasibility of the proposed approach. The study also shows that increasing the bio-oil recycle ratio can improve water conversion and chemical efficiency at the expense of carbon conversion and thermal efficiency.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Analytical
Xi Zeng, Limin Wang, Fang Wang, Dandan Hu, Peng Wu, Xiaoyong Lai
Summary: This study investigated the reaction characteristics of tar thermal cracking and steam reforming using a micro fluidized bed reaction analyzer (MFBRA). The yields of gas components and carbon conversion were calculated and compared at different temperatures and steam partial pressures. The results showed that by raising temperature and steam partial pressure, the yields of H2/CO/CH4 and carbon conversion increased, while the trend of CO2 was initially increasing and subsequently decreasing. The reaction time in tar steam reforming was longer compared to thermal cracking, and there was a reduction in all reaction rates of gas generation and carbon conversion. Additionally, the activated energy of gas components generation and total carbon conversion decreased in tar steam reforming, and steam partial pressure had no impact on the activated energy.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Environmental Sciences
Ji young Nam, Diyar Tokmurzin, Sung Min Yoon, Ho Won Ra, Jae Goo Lee, Dong Hyun Lee, Myung Won Seo
Summary: The global demand for masks has increased due to COVID-19 and mutated viruses, resulting in a large amount of mask waste. Recycling these masks is challenging due to their composition and the risk of viral infection. This study investigated the carbon dioxide gasification of mask waste using a laboratory-scale gasifier and found promising results in terms of tar reduction and carbon conversion efficiency.
ENVIRONMENTAL RESEARCH
(2023)
Article
Energy & Fuels
Dandan Hu, Xi Zeng, Fang Wang, Yanbing Cui, Qi Zhou, Guangwen Xu
Summary: A newly-developed micro fluidized bed reaction analyser (MFBRA) was used to study the effects of char's inherent CaO on tar catalytic cracking. The presence of CaO significantly enhanced the tar conversion process, producing more effective gas components even at low temperatures. The activation energy of various gas products decreased, indicating the good catalytic activity of CaO in char.
Article
Chemistry, Multidisciplinary
Kamilla Arnesen, Thor Anders Aarhaug, Kristian Etienne Einarsrud, Gabriella M. Tranell
Summary: Coal tar pitch, a binder used in the production of anodes for aluminum electrolysis, contains PAHs. The incomplete combustion of PAHs during the baking process leads to emissions. Experimental tests were conducted to examine the effect of temperature and atmosphere on PAH emissions. The results showed that the addition of oxygen significantly reduced the emissions.
Article
Energy & Fuels
Kazushi Norisada, Takahiro Murakami, Hajime Yasuda
Article
Energy & Fuels
Takahiro Murakami, Hajime Yasuda, Kazushi Norisada
Article
Engineering, Chemical
Takahiro Murakami, Tao Yang, Minoru Asai, Yoshizo Suzuki
ADVANCED POWDER TECHNOLOGY
(2011)
Article
Engineering, Chemical
Takahiro Murakami, Minoru Asai, Yoshizo Suzuki
ADVANCED POWDER TECHNOLOGY
(2011)
Article
Energy & Fuels
Takahiro Murakami, Yoshizo Suzuki
Article
Energy & Fuels
Takahiro Murakami, Akio Kitajima, Yoshizo Suzuki
Article
Chemistry, Applied
Takahiro Murakami, Yoshizo Suzuki, Hidekazu Nagasawa, Takafumi Yamamoto, Takami Koseki, Hitoshi Hirose, Seiichiro Okamoto
FUEL PROCESSING TECHNOLOGY
(2009)
Article
Chemistry, Applied
Guangwen Xu, Takahiro Murakami, Toshiyuki Suda, Yoshiaki Matsuzaw, Hidehisa Tani
FUEL PROCESSING TECHNOLOGY
(2009)
Article
Chemistry, Applied
Li Dong, Guangwen Xu, Toshiyuki Suda, Takahiro Murakami
FUEL PROCESSING TECHNOLOGY
(2010)
Article
Engineering, Chemical
Koji Kuramoto, Koichi Matsuoka, Takahiro Murakami, Hideyuki Takagi, Tetsuya Nanba, Yoshizo Suzuki, Sou Hosokai, Jun-ichiro Hayashi
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2009)
Article
Engineering, Chemical
Guangwen Xu, Takahiro Murakami, Toshiyuki Suda, Hidehisa Tani, Yutaka Mito
Article
Energy & Fuels
Takahiro Murakami, Hajime Yasuda
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2020)
Article
Environmental Sciences
Hajime Yasuda, Takahiro Murakami
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2020)
Article
Energy & Fuels
Takahiro Murakami
Summary: Research on reducing tar in lignite gasification using porous alumina particles as a tar adsorbent showed an increase in gas yields and identified polycyclic aromatic hydrocarbons as the main components of tar. The application of porous alumina particles was more effective under steam gasification conditions, enhancing gasification reactions.
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2021)