Article
Chemistry, Applied
Xiaorong Li, Xin Jin, Meijun Wang, Yanxu Yu, Jiao Kong, Wei Xie, Jiancheng Wang, Liping Chang, Weiren Bao
Summary: The reaction of volatiles during the pyrolysis of low-rank coals significantly affects the yield and quality of tar, especially in the downer-bed reactor. At high temperatures, the core structure of volatile radical fragments is dominated by aromatic carbon in the downer-bed reactor.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
Xin Jin, Xiaorong Li, Jiao Kong, Wei Xie, Meijun Wang, Jiancheng Wang, Weiren Bao, Liping Chang
Summary: The study found that increasing temperature in the low-temperature pyrolysis of low-rank coals leads to higher coke yields, with the blend of light oil and pitch inhibiting the transformation of volatile into coke while other distillates promote coke formation, especially the significant interaction between phenolic oil and pitch.
FUEL PROCESSING TECHNOLOGY
(2021)
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
Multidisciplinary Sciences
Chen Jihao, Li Juan, Li Yue, Zhang Jinjing
Summary: In this experiment, the distribution and composition of tar products resulting from pyrolysis of coal with different metal oxide supported catalysts were studied. Fe2O3/γ-Al2O3 catalyst showed the highest tar yield and improved the quality of tar.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Applied
Yanchun Feng, Shaoping Xu, Kechao Wang, Chao Wang
Summary: A study was conducted on the pyrolysis of coarse coal in a moving-bed pyrolyzer under different atmospheres to investigate the impact of steam, CO2, and G-gas. The results showed that steam, CO2, and G-gas had different effects on the yield of coke and tar, with varying reactivities.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Thermodynamics
Jinhu Li, Wei Lu, Jinliang Li, Yongliang Yang, Zenghua Li
Summary: The room temperature oxidation of active sites is considered as the initial heat source for coal self-heating, but the specific microscopic reactions involved in coal oxidation are still not well understood. Therefore, the interconversions between oxygen-functional groups and active sites were investigated. The low-temperature oxidation combined with low-temperature pyrolysis process was used to measure the macroscopic gas concentrations and determine the microscopic content of free radicals and oxygen-containing functional groups. The results revealed that alkyl radicals are the active sites that can transform into oxygen-functional groups during oxidation, leading to heat accumulation and uncontrolled spontaneous combustion.
Article
Chemistry, Multidisciplinary
Ting Li, Yong Li, Yanan Cheng, Xiaorong Li, Yanfeng Shen, Lunjing Yan, Meijun Wang, Liping Chang, Weiren Bao
Summary: The study found that simulated coal gas had a significant impact on the rapid pyrolysis products of low-rank coal, facilitating tar formation while reducing coke yield and pitch content. The presence of H-2 and CO2 in the simulated coal gas played a key role in these effects, leading to changes in the distribution and composition of the pyrolysis products.
Article
Chemistry, Multidisciplinary
Meijun Wang, Qian Wang, Ting Li, Jiao Kong, Yanfeng Shen, Liping Chang, Wei Xie, Weiren Bao
Summary: Steam-activated carbon materials have a greater impact on cracking coal pyrolysis volatiles, resulting in increased tar pitch cracking and phenols content, though it also leads to more coke deposits.
Article
Energy & Fuels
Bohdan Kribek, Olga Bicakova, Ivana Sykorova, Martina Havelcova, Frantisek Veselovsky, Ilja Knesl, Noemi Meszarosova
Summary: Thermal metamorphism of original coal adjacent to burning centers in coal waste heaps is a common phenomenon, and semi-coke and coke are formed during this process. Changes occurring at various temperatures of pyrolysis in the coal matrix were studied by methods of coal petrography, organic and inorganic geochemistry. The results showed that with rising temperature the amount of gas produced during the pyrolysis increased significantly while the amount of released nitrogen from coal organic substance and CO2 decreased and, conversely, the H2 content was increasing significantly.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Environmental Sciences
Chen Jihao, Li Yue, Chen Xinjuan, Zhang Lei, Yang Dongfeng
Summary: This study investigates the desulfurization effect of medium sulfur content bituminous coal through pyrolysis, showing that pyrolysis conditions significantly influence desulfurization efficiency, semicoke volatilization, and calorific value. The desulfurization efficiency remains stable within the temperature range of 450-650 degrees Celsius, with semicoke exhibiting sulfur fixation effect during pyrolysis.
FRESENIUS ENVIRONMENTAL BULLETIN
(2021)
Article
Chemistry, Analytical
Jiachen Yu, Lei Shi, Zhenyu Liu, Xizhuang Qin, Muxin Liu, Qingya Liu
Summary: This study investigates the coking behavior of volatiles in the thermal conversion of low-rank coal by adjusting temperature and residence time using a two-stage reactor. The properties of tar and coke structure were analyzed using FTIR, ESR, and GPC. The results indicate that the temperature for tar condensation is lower than that for coke formation, and oxygen-containing functional groups in tar inhibit the coking process. The coking behavior can be described by first-order + autocatalytic kinetics with low activation energy.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Energy & Fuels
Shumiao Quan, Lei Shi, Bin Zhou, Zhenyu Liu, Qingya Liu
Summary: Biomass pyrolysis by solid heat carrier is efficient in heat transfer, however complicated reactions and transient behaviors make it difficult to understand the relations between operating conditions and actual reactions. This study investigated the impact of temperature and mass ratios on walnut shell pyrolysis and volatiles reaction, showing a significant influence of heat transfer from quartz sand to walnut shell and weak temperature dependence in the oil reaction in quartz sand.
Article
Energy & Fuels
Lei Wu, Yining Guan, Jun Zhou, Xu Jiang, Tiantian Liu, Jie Pan
Summary: Crop waste-assisted microwave pyrolysis of low-rank coal (LRC) can change the pyrolysis reactions and product characteristics by providing sufficient hydrogen for thermal decomposition reactions. The volatiles in corncob (CR) can promote tar production and inhibit pyrolysis gas generation within a certain range during microwave co-pyrolysis, but have the opposite effect beyond this range. Increasing volatiles in CR leads to a decrease in char yields and an increase in pyrolysis water yields. Additionally, the characteristics of char and tar are improved while the content of oxygen-containing functional groups and aliphatic hydrocarbons in tar are reduced.
Article
Chemistry, Analytical
Xin Jin, Lunjing Yan, Beibei Cui, Jiao Kong, Meijun Wang, Liping Chang, Frederik Ronsse, Weiren Bao
Summary: The carbon material prepared by co-pyrolysis of biochar and caking coal has catalytic conversion properties and can be used as a filter medium in coal pyrolysis technology. The study focused on the in-situ catalytic conversion process of coal pyrolysis volatiles using inactive carbon material loaded by nickel (Ni/ICM) and activated carbon material loaded by nickel (Ni/ACM). The results showed that Ni/ACM had more beneficial properties for tar quality improvement compared to Ni/ICM.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Thermodynamics
Zhutao Liu, Jin-Hui Zhan, Dengguo Lai, Minghui Zuo, Xiaoxing Liu
Summary: This study investigated the intrinsic characteristics of Naomaohu coal pyrolysis in a two-stage fixed-bed reactor. The results showed that different temperature chars had varying effects on pyrolysis volatiles, with temperature playing a major role in affecting the distribution of pyrolysates. Char was found to be beneficial for the content and quality of light oil in the low-temperature range, but had a negative impact on the yield and quality of oil in higher temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Applied
Yuxin Yan, Lei Shi, Qingya Liu, Xinge Shi, Ting Wang, Qiaoqiao Zhou, Zhenyu Liu, Wei Han, Mingfeng Li
FUEL PROCESSING TECHNOLOGY
(2017)
Article
Energy & Fuels
Qiaoqiao Zhou, Qingya Liu, Lei Shi, Yuxin Yan, Junfei Wu, Chong Xiang, Ting Wang, Zhenyu Liu
Article
Chemistry, Analytical
Qiaoqiao Zhou, Alireza Zarei, Anthony De Girolamo, Yuxin Yan, Lian Zhang
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2019)
Article
Energy & Fuels
Vincent Tan, Anthony De Girolamo, Tahereh Hosseini, Jameel Aljariri Alhesan, Qiao Qiao Zhou, Lian Zhang
Article
Chemistry, Physical
Qiaoqiao Zhou, Yu Qi, Qianqian Liu, Fei Ren, Zhenyu Chen, Yuxia Zhu, Barbara Etschmann, Lian Zhang
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Chemistry, Physical
Qiaoqiao Zhou, Sasha Yang, Huanting Wang, Zhenyu Lian, Lian Zhang
Summary: This paper presents the unique properties and catalytic performance of scrap tyre char in the selective deoxygenation of biomass volatiles into value-added light oxygenates. The inclusion of sulphur and zinc oxide during prior tyre manufacturing process results in an abundance of organically bound sulphur and nano-sized zinc sulphide in the tyre char, which exhibit multiple acidic sites with different catalytic activities. Reactivity and stability are enhanced through in-situ transformations of active acid sites, enabling prolonged catalyst lifespan and improved performance in cyclic tests.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Vincent Tan, Qiao Qiao Zhou, Binbin Qian, Lei Shi, Tara Hosseini, Jameel Aljariri Alhesan, Lian Zhang
Summary: This study investigated the catalytic performance of waste-derived tyre char in the pyrolysis of lignite under different gas environments and catalyst to lignite mass ratios. The presence of steam in the gas environment promoted the steam-reforming of volatiles and enhanced the acidity strength of the catalyst surface. The tyre char, rich in zinc sulphide, acted as a strong Lewis acid and facilitated the upgrading of lignite volatiles through decarbonylation and steam-reforming reactions.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Sasha Yang, Lei Shi, Qiaoqiao Zhou, Binbin Qian, Anthony De Girolamo, Lian Zhang
Summary: This study conducted systematic experiments to explore the synergistic interaction during the flash pyrolysis of lignocellulosic biomass. The results confirmed that the interaction of biomass components was affected by both heterogeneous char-volatile and homogeneous volatile-volatile interactions. The study also found that the interaction between cellulose/xylan and lignin played a crucial role in promoting overall conversion and increasing bio-oil and non-condensable gas yields.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Sasha Yang, Binbin Qian, Yuan Wang, Kenji Taira, Qiaoqiao Zhou, Karen Wilson, Adam F. Lee, Lian Zhang
Summary: In this study, the reductive thermal processing of iron oxide catalyst derived from fly ash waste was investigated. The resulting catalyst showed enhanced activity for the ketonization reaction of acetic acid due to the introduction of surface oxygen vacancies and acid-base sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Green & Sustainable Science & Technology
Qiaoqiao Zhou, Zhenyu Liu, Ta Yeong Wu, Lian Zhang
Summary: This paper reviews the state-of-the-art advances of furfural production from biomass, focusing on C6 sugars and the emerging pyrolysis method. The conversion of C6 to furfural has not been successful, while C5 sugars have been the primary target. The effects of operating conditions, catalysts, and reaction pathways were extensively reviewed. Future perspectives include unlocking C6 sugars, advancing pyrolysis technology, and synthesizing advanced solid acid catalysts.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Engineering, Environmental
Yuneng Tang, Shenyong Li, Yu Qi, Sasha Yang, Qiaoqiao Zhou, Ruoqun Zhang, Binbin Qian, Bin Su, Lian Zhang, Baiqian Dai
Summary: Reactive adsorption desulfurization (RADS) is an effective technology used in refineries to reduce sulfur contents in oil products. This study investigates the transformation of coke during air-firing and oxy-firing regeneration of a spent Ni/ZnO sulfur adsorbent used in RADS. Lab-scale combustion experiments were conducted to analyze the carbon and sulfur speciation in the regenerated adsorbents. It was found that oxy-firing regeneration improved the efficiency of coke combustion and sulfur conversion.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Qianqian Liu, Bo Peng, Qiaoqiao Zhou, Aiguo Zheng, Xiuzhi Gao, Yu Qi, Shuai Yuan, Yuxia Zhu, Lian Zhang, Haitao Song, Zhijian Da
Summary: This study investigates the impact of iron contaminants on the degradation and crystal transformation of USY zeolite using various spectroscopic techniques. The results suggest that the removal of framework aluminum and its transformation to non-framework aluminum play a crucial role in the collapse of the crystal structure. The introduction of iron promotes the migration of non-framework aluminum and the formation of large clusters, leading to the formation of a low specific surface area and non-catalytic component. These findings shed light on the iron poisoning issues in FCC units.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
