Article
Chemistry, Analytical
Jialong Zhu, Shun Zhao, Baoyong Wei, Ji Xu, Haoquan Hu, Lijun Jin
Summary: This study investigated the synergies between coal and biomass volatiles through three different mixing modes, finding that sufficient void space is needed for optimal synergy. Layered loading modes enhanced co-pyrolysis synergies, with U-type mode showing better results.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
M. Dudziak, S. Werle, A. Marszalek, S. Sobek
Summary: This paper presents oxidation and photocatalytic oxidation as methods to eliminate the toxic activity of biomass pyrolysis liquids in the environment-water. The study found that photocatalysis and ozonation processes effectively decompose organic compounds in tar residue from biomass pyrolysis. However, the post-process solutions still exhibit some level of toxicity.
Article
Agricultural Engineering
Zijun Yi, Chao Li, Haisheng Lin, Shu Zhang, Yong Huang, Bin Li, Shuang Wang, Xun Hu
Summary: In this study, the pyrolysis of poplar sawdust impregnated with different bio-oil fractions was conducted. It was found that the organics in the bio-oil could react with biochar, increasing biochar production. Additionally, impregnation of bio-oil lowered the activation energy and ignition temperatures for combustion, enhanced deoxygenation, and facilitated the formation of mesopores.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Applied
Qian Wang, Meijun Wang, Huan Wang, Jiao Kong, Wei Xie, Jiancheng Wang, Liping Chang, Weiren Bao
Summary: Temperature and gasification gases have significant impacts on the reactions of volatiles generated from rapid pyrolysis of low rank coal. Higher temperature can reduce the ratio of aliphatic hydrocarbons and oxygen-containing compounds, increase polycyclic aromatic naphthalene, and introducing gasification gas from char can enhance tar yields. The results suggest that temperature affects the diffusion and condensation of tar, while free radicals from the gasification gas may alter the repolymerization of volatiles.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Junqin Yu, Lu Ding, Chen Cheng, Alexander Mosqueda, Yonghui Bai, Guangsuo Yu
Summary: The release law of alkali and alkaline earth metals (AAEMs) during coal pyrolysis is affected by pyrolysis temperature, residence time and atmosphere, with CO2 promoting the release of AAEMs. The release rate of AAEMs varies during pyrolysis process.
Article
Chemistry, Analytical
Qinlin Yang, Qiuxiang Yao, Duo Ma, Yongqi Liu, Lei He, Ruishi Zhou, Ming Sun, Xiaoxun Ma
Summary: The catalytic co-pyrolysis of coal and hydrogen-rich substances can improve the yield and quality of coal tar. This study investigated the effects of hematite, chalcopyrite, nickel laterite, and molybdenite catalysts on the product distribution of coal-tar slurry. The addition of catalysts reduced the apparent activation energy of the pyrolysis process and promoted the generation of oxygen-containing compounds and aromatics. The presence of natural minerals enhanced the formation of light tar.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Thermodynamics
Moshan Li, Yiyu Lu, Erfeng Hu, Yang Yang, Yishui Tian, Chongyang Dai, Chenhao Li
Summary: Optimizing secondary reactions using infrared-fast pyrolysis is beneficial for studying copyrolysis behavior. This study conducted co-pyrolysis of high-alkali coal (PC) and polyethylene at different temperatures, co-pyrolysis of polyethylene with demineralized coal (DP), and pyrolysis of raw high-alkali coal (RC) and demineralized coal (DC) in an infrared heating reactor. The results show that co-pyrolysis promoted tar formation, with the highest yield of 16.16% at 700 degrees C. The addition of PE coupled infrared rapid heating reduced nitrogen and chlorine-containing fractions and increased the content of long-chain alkanols and linear hydrocarbons.
Article
Materials Science, Multidisciplinary
Mckenna Mae Lin Hitter, S. K. Varma
Summary: Non-BCC high entropy alloys were investigated in their as-cast and oxidized condition, and the effect of Si on the microstructures in Al-Cu-Ni-Mn alloy was explored. It was found that the addition of Si only changed the composition of the identified phases, while the microstructure remained unaltered.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Energy & Fuels
Hongliang Sun, Dongdong Feng, Yu Zhang, Shaozeng Sun, Yijun Zhao, Feng Zhang
Summary: This study investigates the regeneration of catalytic activity of biochar through partial oxidation for biomass tar reforming. The results demonstrate that oxidative regeneration effectively recovers the catalytic activity of biochar and promotes the production of methane and hydrogen. The regenerated biochar exhibits increased external surface area, microporous area, and abundance of oxygen-containing structures, compared to the deactivated biochar. The optimal regeneration condition for deactivated biochar is found to be 9 minutes with 0.4% oxygen concentration.
Article
Engineering, Chemical
Zhendong Wang, Qianhao Ye, Mingjie Li, Xiangqiang Cheng, Jinjia Wei, Fu Yang, Zhonghui Duan
Summary: In this paper, a POD reduced-order interpolation model is used to predict the flow and heat transfer performance in the porous media region during the in situ pyrolysis process of tar-rich coal. The accuracy of the predicted results is verified through comparison with the results obtained using the finite volume method (FVM). The effects of inlet velocity, inlet temperature, permeability, and porosity on the quality fraction of oil and gas production are analyzed.
Article
Materials Science, Multidisciplinary
Yimin Liao, Minghui Chen, Min Feng, Qunchang Wang, Jinlong Wang, Shenglong Zhu, Fuhui Wang
Summary: This study demonstrates that the addition of nanoparticles of ZrB2 in enamel composite coating enhances both oxidation protection and high thermal shock resistance at temperatures of 700 and 800 degrees C. This is attributed to the high thermal stability of ZrB2 and its unique oxidation products, which allow cracks to heal.
Article
Materials Science, Coatings & Films
Yingbo Zhang, Dening Zou, Xiaoqiao Wang, Quansheng Wang, Ran Xu, Wei Zhang
Summary: The study investigated the influence of Si content on the high-temperature oxidation resistance of X10CrAlSi18 FHSS, revealing that a higher Si content could reduce its oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Energy & Fuels
Yuxin Wen, Simeng Liu, Shihao Fu, Zhiheng Wang, Haoquan Hu, Lijun Jin
Summary: The co-pyrolysis of coal and waste tire is a significant method for their clean and efficient utilization. By using a rapid infrared-heated fixed-bed reactor, the effects of heating rate, pyrolysis temperature, and mixing ratio on the products distribution, tar quality, and compositions during the co-pyrolysis of Yulin coal (YL) and waste tire (WT) were investigated. The results revealed that the heating rate, mixing ratio, and pyrolysis temperature exerted a synergistic effect during co-pyrolysis. Moreover, the addition of WT in blends led to an increase in the content of light tar in the co-pyrolysis tar. Gas production was also suppressed during co-pyrolysis.
Article
Engineering, Environmental
Bin Xu, Jianjun Xie, Huacai Liu, Wenshen Yang, Xiuli Yin, Chuangzhi Wu
Summary: In this study, the partial oxidation of toluene as a biomass tar surrogate was investigated in a dielectric barrier discharge (DBD) plasma reactor. The effect of reaction temperature, O2/toluene molar ratio (OTR) and discharge power on performances was studied. The results showed that higher temperatures, OTRs and discharge power led to better performances by promoting toluene destruction and gas product production. Excited N2 species played a crucial role in the process, and the method showed potential for gasification gas purification.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yi Lv, Binhai Cheng, Hang Yang, Xiaomin Cui, Ming Zhao
Summary: This study explores the use of LaFeO3 perovskites as oxygen carriers for the chemical looping partial oxidation (CLPO) process to convert tar to high-purity syngas. The template synthesis method demonstrates the best performance, with high toluene conversion efficiency, CO selectivity, and recyclability. The H2/CO ratio in the syngas products can be adjusted within a certain range by controlling the reaction time of toluene catalytic cracking. The research also proposes a new in-situ CLPO process for tar-containing syngas purification to achieve tunable H2/CO ratio.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Shouya Saragai, Shinji Kudo, Jonathan Sperry, U. P. M. Ashik, Shusaku Asano, Jun-ichiro Hayashi
Summary: This work demonstrates that using deep eutectic solvents as catalysts in cellulose pyrolysis can enhance the selectivity and yield of levoglucosenone. The recovered DESs can be reused multiple times, offering potential for high productivity of levoglucosenone.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Applied
Lijuan Zhang, Thuppati U. Rao, Jingyi Wang, Dezhang Ren, Suchada Sirisommboonchai, Cheolyong Choi, Hiroshi Machida, Zhibao Huo, Koyo Norinaga
Summary: Research on biomass hydrogenation improves the efficiency of producing high-value chemicals and provides insights into utilizing raw constituents effectively.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qianli Wang, Shinji Kudo, Shusaku Asano, Jun-ichiro Hayashi
Summary: This study investigates the method and properties of converting rice husk into high-strength material through hot-compressed water treatment. The research finds that the plates of hot-compressed water-treated rice husk have higher tensile and flexural strengths, as well as lower water absorptivity and swellability, compared to the original rice husk. These improvements are mainly attributed to improved pulverizability, the occurrence of fibrous reinforcement material, and optimized fractions of cellulose, silica, hemicellulose, and lignin.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Energy & Fuels
Sou Hosokai, Yoshizo Suzuki, Koichi Matsuoka, Koji Kuramoto
Summary: This study investigated the characteristics of in situ coal tar reforming with char, revealing that increasing the amount of additional char decreased heavier tar and rising operation pressure restricted the reforming reaction of heavy tar with additional char. Additionally, the pore structure of char was found to be plugged after the tar-reforming reaction, resulting in a decrease in available pores with increased operation pressure.
Article
Energy & Fuels
Alireza Z. Mofrad, Xiangpeng Gao, Ibukun Oluwoye, Jun-ichiro Hayashi, Mohammednoor Altarawneh, Hongwei Wu
Summary: This study introduces a novel process for treating pyrolytic wastewater from biomass pyrolysis, using char-assisted drying to simultaneously treat wastewater and recover valuable chemicals. The process can be operated in two modes, enabling efficient treatment of organic compounds in wastewater and recovery of valuable chemicals under different temperature and char-to-PWW mass ratio conditions. The results demonstrate the effectiveness of the process in treating wastewater and recovering organic compounds, with potential applications in sustainable waste treatment and chemical recovery.
Article
Environmental Sciences
H. D. Gohoho, H. Noby, J-i Hayashi, A. H. El-shazly
Summary: In this study, peanut shell was used to prepare activated carbon and modified to form a composite material for wastewater treatment. The impact of acid doping on the composites and its mechanism for dye removal were investigated.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2022)
Article
Energy & Fuels
Fu Wei, Shinji Kudo, Shusaku Asano, Jun-ichiro Hayashi
Summary: This study demonstrates the valorization of woody biomass into valuable chemicals and high-strength coke through the staged conversion of torrefaction, pelletization, and carbonization. Loading mineral acid on wood proved to be effective in improving anhydrosugar yield and coke strength. The results highlight the positive influence of torrefaction on wood composition and coke properties.
Article
Energy & Fuels
Aditya Wibawa, U. P. M. Ashik, Shinji Kudo, Shusaku Asano, Xiangpeng Gao, Jun-ichiro Hayashi
Summary: In this study, the production of high-strength coke from torrefied softwood and noncaking coal was investigated. The sequential processes of pulverization, mixing, binderless hot briquetting, and carbonization were used. The resulting coke exhibited a tensile strength of 5-17 MPa, which was equal to or higher than that of conventional coke. The mixing of torrefied softwood and coal hindered the densification of coke, but positive synergy occurred at high fractions of torrefied softwood, resulting in enhanced coke strength. Fine pulverization of the mixed materials further increased the coke strength.
Article
Chemistry, Physical
Suchada Sirisomboonchai, Hiroshi Machida, Khuyen Viet Bao Tran, Masaya Kawasumi, Koyo Norinaga
Summary: This study presents a method of electrochemical reduction of CO2 using a three-dimensional structure of InZnCu electrocatalyst, which demonstrates high efficiency, long lifespan, and excellent stability. Additionally, a two-electrode system constructed based on CF-modified surface provides valuable guidelines for further optimization of the CO2RR-OER system. This research provides a direction for the development of electrochemical CO2 reduction for industrial applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Sidra Jabeen, Xiangpeng Gao, Jun-ichiro Hayashi, Mohammednoor Altarawneh, Bogdan Z. Dlugogorski
Summary: This study highlights the significant impacts of product recovery methods on the yields and properties of hydrochars produced from algal biomass through hydrothermal carbonization. Direct filtration results in higher hydrochar yield with residue biocrude, leading to considerable differences in properties compared to DCM-aided filtration. DCM-aided filtration produces hydrochars with lower volatile matter contents but higher fixed carbon and ash contents, showing greater specific reactivity due to higher concentrations of catalytic alkali and alkaline earth metals.
Article
Chemistry, Multidisciplinary
Gi-Dong Park, Suchada Sirisomboonchai, Koyo Norinaga
Summary: In this study, nickel single-atom catalysts (SACs) were synthesized using lignin derived from biomass, and the coordination environment of active nickel-N-x sites was manipulated. The Ni SAC on lignin-derived N-doped carbon achieved a remarkable CO Faradaic efficiency of 98.2% for CO2 reduction to CO.
Article
Energy & Fuels
Tailin Li, Cheolyong Choi, Kazui Fukomoto, Hiroshi Machida, Koyo Norinaga
Summary: The injection of CO2 into coal gasifier is a promising method for CO2 recirculation, but the effect of CO2 injection on the formation of PAHs and soot needs to be investigated for optimizing gasifier design. This study uses a detailed chemical kinetic model to examine the formation of PAHs and soot in gas-phase reactions under different gasifying agents in a two-stage entrained flow coal gasifier. The results show that under the O2/CO2 and O2/H2O-blown conditions, aromatics reforming is enhanced while the yields of tar and soot are effectively suppressed. The findings have practical significance for CO2 recirculation in the oxy-fuel IGCC system.
Article
Metallurgy & Metallurgical Engineering
Yasuhiro Saito, Takumu Higo, Chiho Tsukamoto, Shinji Kudo, Jun-ichiro Hayashi
Summary: In this study, the strength, pore structure, and material constants of coke prepared from caking coal (Coke A) and non- or slightly caking coal (Coke C) were investigated experimentally and numerically at high temperatures. The results showed that Coke A had higher strength and lower porosity compared to Coke C. The numerical analysis revealed that heating could decrease the Young's modulus of Coke A and increase its compression stress, leading to an increase in coke strength.
ISIJ INTERNATIONAL
(2023)
Article
Engineering, Environmental
Sidra Jabeen, Xiangpeng Gao, Jun-ichiro Hayashi, Mohammednoor Altarawneh, Bogdan Z. Dlugogorski
Summary: This study evaluated the effects of reaction conditions on the yields and properties of biocrude and aqueous phase in hydrothermal carbonization of Chlorella vulgaris. The results showed that increasing the reaction temperature and time can enhance the biocrude yield and carbon recovery, but decrease the aqueous phase yield. The aqueous phase is rich in organic nitrogen and various inorganic species, making it suitable for recycling as cultivation media.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Shusaku Asano, Samuel J. Adams, Yuta Tsuji, Kazunari Yoshizawa, Atsushi Tahara, Jun-ichiro Hayashi, Nikolay Cherkasov
Summary: The selectivity of palladium catalysed hydrogenation can be improved by adding a homogeneous modifier such as quinoline. The study confirms the effectiveness of multi-parameter optimization, with 1,10-phenanthroline showing the best selectivity.
REACTION CHEMISTRY & ENGINEERING
(2022)