Article
Engineering, Environmental
Jie Zhu, Zhihao Huang, Xi Chen, Siyaxuan Xiong, Suyu Zhang, Hongji Chen, Yetao Tang, Zhenming Xu, Jujun Ruan
Summary: This study proposes a method of debromination by co-pyrolysis using spent automotive catalysts, which increases the debromination rate of waste brominated resin. The catalytic debromination of Pd in spent automotive catalysts relies on oxidative addition and decomposition reactions. This work is of great importance for the reuse of spent automotive catalysts and the safe disposal of brominated resin.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Engineering, Environmental
Sumin Pyo, Avnish Kumar, Moonis Ali Khan, Byong-Hun Jeon, Siyoung Q. Choi, Young-Min Kim, Young-Kwon Park
Summary: Pyrolysis is used as an environmental technology for treating e-waste and producing fuel, but the presence of brominated compounds in the pyrolysis oil hinders its commercialization. This study explored the use of various zeolites and basic metal oxides for the pyrolysis of FPCBs to produce bromine-free oil. Zeolites showed higher efficiency in debrominating aromatic hydrocarbons compared to basic metal oxides. HZ (30) catalyst resulted in highly selective production of benzene and toluene. CaO and HZ (30) were effective in debromination and aromatic production, respectively. In-situ CaO/ex-situ HZ (30) combination achieved 100% debromination efficiency, while in-situ HZ (30)/ex-situ CaO configuration had higher aromatic hydrocarbon production with 77.5% debromination efficiency when the amount of CaO was increased.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Chunyu Li, Chengfei Liu, Hongying Xia, Libo Zhang, Dafang Liu, Bo Shu
Summary: Microwave-assisted co-pyrolysis of waste printed circuit boards (WPCBs) with alkaline metal oxides was conducted to investigate the properties of pyrolysis products and the fixation of bromine. The addition of Ca(OH)(2) facilitated the composite reaction of brominated epoxy resin, resulting in an increase in the relative percentage of phenol and other compounds. The conversion and immobilization of organic bromine in the product were promoted by Ca(OH)(2), which reacted with bromine radicals to form CaBr2, leading to a significant improvement in the immobilization efficiency of bromine in the solid pyrolysis product and a reduction in the content of bromine in the gas and liquid phases.
Article
Polymer Science
Konstantin I. Dement'ev, Stanislav P. Bedenko, Yulia D. Minina, Aniya A. Mukusheva, Olga A. Alekseeva, Timur A. Palankoev
Summary: The fast catalytic pyrolysis of polystyrene in hydrocarbon medium over zeolite catalysts was investigated at temperatures of 450-550 degrees C. The study examined the influence of reaction conditions (medium, temperature, vapor residence time, polystyrene concentration) on polymer conversion and product distribution. The results showed high polymer conversion with ethylbenzene, benzene, and toluene as the main products. The highest yield of ethylbenzene (80%) was achieved at 550 degrees C, vapor residence time of 1-2 s, and 10% polystyrene concentration in heavy cycle oil as the medium. The influence of zeolite topology on product distribution was also explored, and a possible mechanism of polystyrene pyrolysis was proposed.
Review
Chemistry, Multidisciplinary
Qiming Sun, Ning Wang, Jihong Yu
Summary: Zeolite-supported metal catalysts have shown superior activity and thermal stability in catalytic reactions, being widely applied in hydrogenation, dehydrogenation, oxidation, and other reactions, with promising prospects for future advancements.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Applied
Long Zhang, Shushu Huang, Wei Deng, Dengyao Yang, Qianxi Tang, Simin Zhu, Limin Guo
Summary: Three different MFI type zeolites were synthesized as supports, and Co3O4 supported MFI type zeolite catalysts were prepared for dichloromethane catalytic combustion. The catalysts showed better performance than pure Co3O4, with Co3O4/ZSM-5 catalyst exhibiting the best results due to its proper BrOnsted acid sites amount.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Jae-Wang Shim, Sumin Pyo, Su Shiung Lam, Jungho Jae, Byong-Hun Jeon, Moonis Ali Khan, Kun-Yi Andrew Lin, Young-Min Kim, Sang-Chul Jung, Young-Kwon Park
Summary: This study investigated the pyrolysis kinetics and product distribution of chicken manure through thermogravimetric analysis and pyrolyzer-gas chromatography/mass spectrometry. The results showed different decomposition reactions at different stages and the catalytic effect of acid catalysts on product formation.
Article
Agricultural Engineering
Shuang Xue, Zhongyang Luo, Haoran Sun, Wanchen Zhu
Summary: In this study, modified bimetallic micro-mesoporous zeolite catalysts were prepared and successfully applied in the process of ex-situ catalytic fast pyrolysis of biomass, leading to an improvement in the quality of liquid fuel. The addition of clay catalysts and the use of a HAP&Zeolite dual catalyst system resulted in a decrease in coke yield. Real-time monitoring showed that the catalytic performance of zeolites began to decrease when the ratio of biomass and catalyst exceeded 1.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Xiaolong Tian, Kongshuo Wang, Tilun Shan, Zhaogyang Li, Chuansheng Wang, Dianrui Zong, Dongmei Jiao
Summary: This study aims to reduce the cost of catalytic pyrolysis of waste rubber by using spent FCC catalysts and to improve the quality and production efficiency of pyrolysis products through collaborative high-value reuse of waste rubber and spent FCC catalysts.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Agricultural Engineering
Shuang Xue, Zhongyang Luo, Qingguo Zhou, Haoran Sun, Liwen Du
Summary: A novel preparation method for molybdenum modified bimetallic micro-mesoporous catalyst was proposed for catalytic fast pyrolysis of enzymatic hydrolysis lignin. The optimized catalyst structure and interaction between zeolite support and metal species contributed to the regulation of active sites distribution and the production of MAHs. The NiMo/AZM catalyst showed the most significant coke inhibition effect and achieved high mass yield of MAHs and low selectivity of bulky oxygenates.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Salman Raza Naqvi, Asif Hussain Khoja, Imtiaz Ali, Muhammad Naqvi, Tayyaba Noor, Awais Ahmad, Rafael Luque, Nor Aishah Saidina Amin
Summary: This article presents a scientometric analysis of the use of micro-porous zeolites for deoxygenation of biomass-derived bio-oil. The physicochemical properties of catalysts and the degree of deoxygenation are examined. The reaction pathways for different zeolites in bio-oil upgrading are also discussed. The technology readiness level is assessed and future recommendations are provided.
Article
Energy & Fuels
Xiangyu Li, Yongqiang Pang, Zheng Ding, Jian Li, Xingyi Jiang, Yanbo Luo, Hongfei Zhang, Fengpeng Zhu, Yujue Wang
Summary: The study found that mesoporous ZSM-5 and Ga-containing MFI zeolites significantly enhanced the synergistic effect of cellulose and PP for aromatic production during co-feeding catalytic fast pyrolysis. By introducing mesopores in microporous MFI zeolite through alkaline treatment and incorporating Ga, the zeolites showed improved catalytic conversion and dehydrogenation activity, leading to higher aromatic yields and reduced coke formation.
Review
Multidisciplinary Sciences
Sasa Papuga, Milica Djurdjevic, Andrea Ciccioli, Stefano Vecchio Ciprioti
Summary: The latest findings and limitations in catalytic pyrolysis for the processing of plastic waste into valuable fuels are addressed in this review. Catalytic pyrolysis provides better results compared to thermal degradation of plastics, especially in terms of the quality of the obtained liquid hydrocarbon fuel. Various types of catalysts, such as zeolites, fluid catalytic cracking, silica-alumina catalysts, and natural clays, can be used to improve the thermal degradation of plastics. Finding affordable and effective catalysts is crucial for the commercialization of catalytic pyrolysis of plastic waste. This study summarizes the most significant results and investigates the symmetry effects of molecules on the pyrolysis process.
Article
Green & Sustainable Science & Technology
Jie Liang, Guangcun Shan, Yifei Sun
Summary: Catalytic fast pyrolysis (CFP) is a promising technology for converting biomass into transportable fuels. This review discusses the key role of zeolites in lignocellulosic biomass CFP, highlighting challenges in designing effective zeolite catalysts and exploring future catalyst developments.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Analytical
Jiayu Xu, Yuan Guo, Ying Gao, Kezhen Qian, Yinfeng Wang, Na Li, Yuang Wang, Shuai Ran, Xiaoke Hou, Yuezhao Zhu
Summary: In this study, the performance of different zeolites (SAPO18, SAPO11, SAPO34, and SSZ13) for catalytic pyrolysis of cellulose and hemicellulose to generate furans was compared. It was found that SSZ13 significantly improved the selectivity of cellulose and hemicellulose conversion to furans. SAPO11 also showed a positive effect on the conversion of 5-HMF to 5-MFF. The formation of furans was suggested to occur on the external surface of the zeolite, and the difference in mass transfer rates between the inner and outer surfaces of the zeolite contributed to the generation and transfer of furans.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Engineering, Chemical
Mengxia Qing, Yutian Long, Yidong Luo, Ziying Luo, Wenhao Li, Hong Tian, Yanshan Yin, Jinqiao He, Liang Liu, Jun Xiang
Summary: Effective slagging is crucial for FW gasification, and this study focuses on the regulation of temperature and wheat straw to improve ash fusion characteristics. The addition of wheat straw can effectively decrease the ash fusion temperatures and enhance the slagging process.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Yawei Song, Yifeng Chen, Sheng Su, Hao Tang, Hengda Han, Jun Xu, Long Jiang, Mengxia Qing, Yi Wang, Song Hu, Jun Xiang
Summary: The combustion characteristics of acid-washed and inorganic sodium impregnated coals were studied under different heating rates, and it was found that inorganic sodium inhibits coal combustion in the early stage, but promotes it in the later stage.
Article
Chemistry, Analytical
Shogo Kumagai, Masumi Sato, Chuan Ma, Yumi Nakai, Tomohito Kameda, Yuko Saito, Atsushi Watanabe, Chuichi Watanabe, Norio Teramae, Toshiaki Yoshioka
Summary: The thermal-oxidative degradation of sulfur-based plastics (PPS, PES, and PSU) was investigated using various techniques. The results showed that these plastics undergo decomposition at specific temperatures under different atmospheres, and their chemical structures are altered during degradation. The thermo-oxidative products were also analyzed, providing insights into the degradation behavior of sulfur-based plastics. Combining conventional techniques with advanced analytical technologies, this study comprehensively characterized the degradation behavior of sulfur-based plastics.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Thermodynamics
Baihe Guo, Jingchao Zhang, Yanlin Wang, Xiaolei Qiao, Jun Xiang, Yan Jin
Summary: The use of fly ash to prepare aerogel support for CO2 adsorption was studied. The results showed that the aerogel support made from fly ash had good microscopic properties and achieved high adsorption capacity under certain conditions.
Review
Energy & Fuels
Xin Wang, Jun Xu, Peng Ling, Xiaoxue An, Hengda Han, Yifeng Chen, Long Jiang, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: This study investigated the characteristics of sewage sludge and coal slime combustion, finding that co-combustion had a positive effect on desulfurization. Proper blend ratios and temperatures could effectively suppress the emission of SO2. The evolution of S functional groups showed different patterns during co-combustion. Calcium played an important role in the process, reacting with SO2 to form intermediate solid products and retaining SO2 in the ash.
Article
Energy & Fuels
Abdulmajid Abdullahi Shagali, Song Hu, Hanjian Li, Huanying Chi, Haoran Qing, Jun Xu, Long Jiang, Yi Wang, Sheng Su, Jun Xiang
Summary: The heating rate has a significant impact on the pyrolysis process, especially for reactions involving the co-pyrolysis of biomass and plastic. The synergistic effects of the blend samples are concentrated in the main decomposition region, and the co-pyrolysis process requires less activation energy compared to the pyrolysis of plastic alone.
Article
Environmental Sciences
Shengyu Xie, Yu Wang, Chuan Ma, Gefu Zhu, Yin Wang, Chunxing Li
Summary: This study investigates the pyrolysis of antibiotic mycelial residue (AMR) at different temperatures and heating rates to produce valuable biochar for heavy metal immobilization. The results show that the decomposition of AMR involves three pseudo-reactions that fit a three-dimensional diffusion model. Increasing the pyrolysis temperature and heating rate reduces the yield and volatile matter content of the biochar, but increases the ash content, fixed carbon content, and aromaticity. The AMR-derived biochar demonstrates favorable fuel properties and stability against soil degradation, making it a valuable carbon resource.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Thermodynamics
Jing Zhou, Meng Zhu, Lei Chen, Qiangqiang Ren, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: This study aims to construct the performance analysis and system optimization methods of supercritical CO2 (S-CO2) coal-fired CHP plants with MEA-based post-combustion carbon capture and storage (CCS) that has adapted for various S-CO2 CHP cycles. Results show that exergy efficiency of S-CO2 DPR coal-fired CHP units at 0% and 100% heating loads (HL) are 43.22% and 46.21%, increasing by 9.81% and 1.01% compared with S-CO2 recompression CHP units, respectively.
Review
Chemistry, Physical
Ben Wang, Rajender Gupta, Lei Bei, Qianmin Wan, Lushi Sun
Summary: This review provides an overview of research progress related to syngas quality, tar formation, and minerals transformation. It also describes the current technology under construction and commercial applications, as well as the challenges and prospects for commercial operation. The study highlights the importance of temperature, gasification agents, and steam to MSW ratio in syngas production, and discusses the different forms of tar in various atmospheres. The review also emphasizes the need for efficient catalysts, proper management of heavy metals, and the reduction of investment and operational costs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Kuan Du, Beichen Yu, Yimin Xiong, Long Jiang, Jun Xu, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: Bio-oil emulsions were stabilized using solid emulsifiers such as coconut shell coke, modified amphiphilic graphene oxide, and hydrophobic nano-fumed silica. The stability of the emulsions was influenced by the particles used. The emulsion stabilized by Ni/SiO2 showed potential for catalytic hydrodeoxygenation of bio-oil, inhibiting the polymerization reaction and promoting the conversion of phenolic compounds.
Article
Engineering, Chemical
Jialin Zhang, Song Hu, Yong Ding, Rui Huang, Qiangqiang Ren, Sheng Su, Yi Wang, Long Jiang, Jun Xu, Jun Xiang
Summary: In this study, a hydrothermal-carbonization method was utilized to process waste biomass, resulting in the production of high-value carbon aerogels. The banana peel-based carbon aerogel showed the best performance in ethanol cracking, achieving a hydrogen yield of 41.86%. The enhanced ethanol cracking was attributed to the abundant pores in the carbon aerogel, which extended the residence time, and the presence of inorganic components (such as Ca, Mg, and K) on the surface of the aerogel, which promoted bond-breaking and reorganization in ethanol.
Review
Engineering, Chemical
Chong Tao, Limo He, Xuechen Zhou, Hanjian Li, Qiangqiang Ren, Hengda Han, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: This review discusses the characteristics and removal methods of volatile organic compounds (VOCs) in cooking oil fumes. The emission characteristics are influenced by cooking temperatures, cooking oils, and cuisines. Various purification methods, such as physical capture, chemical decomposition, and combination methods, are compared based on VOC removal rate, operability, secondary pollution, application area, and cost. The catalytic combustion method, particularly with noble metal and non-noble metal catalysts, shows high efficiency, environmental friendliness, and low cost.
Article
Engineering, Environmental
Mengxia Qing, Linlin Zhang, Liang Liu, Yaxin Chen, Yunda Su, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: SiO2 doping improves the de-NOx activity of MnCe/Ti catalysts at high temperatures and enhances their sulfur resistance at wide temperatures.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Siyuan Lei, Zhaohui Du, Yujia Song, Tingting Zhang, Ben Wang, Changsong Zhou, Lushi Sun
Summary: Novel copper-doped zirconium-based MOF (UIO-66) and copper-doped iron-based UIO-66 catalysts were prepared to improve the removal performance of gaseous benzene. The catalysts were characterized using various techniques, and it was found that the bimetal Cu/Fe modification had a positive effect on the morphology of the catalyst particles. The factors of different metal loading, dose of H2O2, and reaction temperature were studied, and it was observed that Cu-1.5/Fe-1.5@UIO-66 achieved the highest benzene removal efficiency of 94.6%. The study also provided insights into the activation mechanism of the catalyst and its potential application in treating benzene pollutants in waste gases.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Chuan Ma, Shogo Kumagai, Atsushi Watanabe, Chuichi Watanabe, Norio Teramae, Toshiaki Yoshioka, Young -Min Kim
Summary: Hydropyrolysis of lignin was studied to understand the effects of temperature, pressure, catalyst, and reaction atmosphere on product yields and distributions.
CHEMICAL ENGINEERING JOURNAL
(2024)
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)