Article
Thermodynamics
Muhammad Awais, Muhammad Mubashar Omar, Anjum Munir, Wei li, Muhammad Ajmal, Sajjad Hussain, Syed Amjad Ahmad, Amjad Ali
Summary: This study evaluated the effects of biomass ratios on gasification efficiency, reactor thermal profile, and specific yield of syngas composition and tar contents. The results suggested that the mixture of sugarcane bagasse + coconut shells was a suitable feedstock mixture for gasification.
Article
Energy & Fuels
Zi-Meng He, Yu-Jie Deng, Jing-Pei Cao, Xiao-Yan Zhao
Summary: Co-gasification of biomass and coal has advantages in mitigating ash-related problems induced by potassium in biomass. However, the effect varies depending on the occurrence mode of inorganic K in biomass. The study found that K2CO3 and K2SO4 are mainly retained as KAlSiO4 and K2SO4 in the gasification ash. Co-gasification with coal can help mitigate bed agglomeration caused by K2CO3, K2SO4, and KCl in biomass.
Article
Thermodynamics
A. Fazil, Sandeep Kumar, Sanjay M. Mahajani
Summary: Gasification is a technically feasible method for municipal solid waste valorization, which can meet emission limits and reduce landfill burden. This study investigates the potential of using paper-rich commercial refused-derived fuel (RDF) with high ash content for gasification and co-gasification. The results suggest that co-gasification can reduce overall ash content and increase the heating value of the gas produced.
Article
Energy & Fuels
Shiyu Zhang, Mengna Wu, Zheng Qian, Qinghai Li, Yanguo Zhang, Hui Zhou
Summary: The advancement of biomass utilization technology is crucial for addressing global climate change and the depletion of fossil resources. This study investigates the production of CO-rich syngas from the CO2 gasification-reforming of biomass components. The results show that using nanorod CeO2 supported Ni catalysts can enhance volatile CO2 reforming reactions and significantly increase gas yield. The structure and stability of the catalysts were characterized for further understanding.
Article
Engineering, Environmental
Jinhao Zheng, Lei Liao, Rui Liu, Chongcong Li, Yan Zhang
Summary: This study explored a promising approach to co-manage torrefaction condensates (TCs) and carbon-rich fly ash (FA), finding that the blending of FA and TC improved CO2 gasification reactivity and combustion performance of the resulting mixtures.
Article
Energy & Fuels
Acelya Secer, Erturk Sayan, Sefika Turker Uzden, Arif Hasanoglu
Summary: In this study, the effects of 6 different solvents as co-solvents in hydrothermal gasification of biomass were investigated. The results showed that NMP and THF co-solvents had synergistic effects on hydrogen production at 350 degrees C, with NMP having a hydrogen yield of 3.5 (+/- 0.1) mol H2/kg and THF having a hydrogen yield of 3.1 mol H2/kg.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Energy & Fuels
Siqin Li, Hao Song, Junhao Hu, Haiping Yang, Jun Zou, Youjian Zhu, Ziyue Tang, Hanping Chen
Summary: The study found that straw biomass with higher cellulose and hemicellulose content, such as corn straw, wheat straw, and rice straw, exhibited higher pyrolysis reactivity. In the char gasification stage, the content of fixed carbon and catalytic ash components played a significant role in determining weight loss and reactivity, with corn straw, cotton straw, and soybean straw performing better in char gasification. Kinetics results showed that the homogeneous reaction model better described the pyrolysis stage, while the shrinking core model was more suitable for the char gasification stage in all straw biomass.
Article
Energy & Fuels
Yan Cao, Yu Bai, Jiang Du
Summary: East Asia is facing a significant population growth, posing challenges to traditional waste management systems. Gasification has gained attention for its ability to convert carbon-based residues into valuable gas at a lower cost compared to other technologies. This study used an ASPEN plus model to simulate the steam co-gasification of polyethylene (PE) and pine (PI) at various temperatures, steam/waste ratios, and PE contents. The results were compared with experimental data, showing good agreement. Increasing the gasifier temperature and steam/waste ratio led to higher hydrogen production and lower tar content in the syngas. The addition of PE increased hydrogen content and yield, while also increasing tar concentration.
JOURNAL OF THE ENERGY INSTITUTE
(2024)
Article
Agricultural Engineering
Simon Vecten, Michael Wilkinson, Nuno Bimbo, Richard Dawson, Ben M. J. Herbert
Summary: The study effectively converted biomass into combustible gas using pure steam in a microwave-induced plasma reactor, achieving a carbon conversion efficiency of over 98% and producing syngas with high calorific value and rich hydrogen content.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jun Zhao, Dan Xie, Shuzhong Wang, Rui Zhang, Zhiqiang Wu, Haiyu Meng, Lin Chen, Tao Wang, Yang Guo
Summary: Gasification of biomass and waste in an oxygen-rich atmosphere is an economical method for hydrogen production, with increased oxygen concentration leading to higher hydrogen concentration and calorific value in the syngas. Controlling parameters such as air flow rate and oxygen concentration can help optimize hydrogen production during the gasification process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Energy & Fuels
Praveen Kumar Ghodke, Amit Kumar Sharma, Arun Jayaseelan, K. P. Gopinath
Summary: The increasing global population growth, modernization, and industrialization have led to a significant rise in energy consumption, resulting in worsened climate conditions and greenhouse gas emissions. As a result, researchers are exploring eco-friendly and sustainable energy sources, with hydrogen (H2) emerging as a clean and carbon-free future energy carrier. Thermochemical routes and the use of lignocellulosic biomass have shown great potential for sustainable H2 production. This study provides an overview of advancements in gasification technologies, operating conditions, catalysts, and emerging technologies for improving H2-rich syngas production.
Article
Thermodynamics
D. A. Buentello-Montoya, C. A. Duarte-Ruiz, J. F. Maldonado-Escalante
Summary: This study simulates the co-gasification of plastics and biomass and finds that increasing the proportion of plastics in the gasification feedstock improves the gas heating value and tar content. PET is the least valuable plastic in the process, and the H2/CO ratio decreases with temperature during the gasification of a mixture of PP/PET/biomass, which is important for the end-use of the syngas.
Article
Thermodynamics
Adam Smolinski, Natalia Howaniec
Summary: The paper presents the results of a systematic study on the co-gasification of sewage sludge blends with biomass waste using oxygen and steam. The experiments showed that gasification of sewage sludge alone was ineffective, but co-gasification with selected biomass resulted in higher gas production and better gas composition.
Article
Energy & Fuels
Hongchang Xin, Jiawei Wu, Jiaxin Zhang, Sifan Chen, Huaqiang Pang, Juan Lv, Enchen Jiang, Zhifeng Hu
Summary: K is the most abundant trace metal in biomass, which has a dual effect on chemical looping gasification (CLG) by promoting performance and inhibiting oxygen carrier (OC) performance. This study investigates the dual effect of K on CLG performance under different K content, steam, K existence form, and thermo-kinetics analysis. The results show that K can significantly promote CLG performance at low K-addition and accelerate agglomeration at 12% K-addition. The addition of steam can utilize the promotion effect of CH3COOK and inhibit the formation of Fe2SiO4 and agglomeration.
Article
Thermodynamics
Hong Du, Xiuyun Ma, Miao Jiang, Peifang Yan, Z. Conrad Zhang
Summary: A new strategy was developed to significantly increase the carbon utilization efficiency of biomass fast pyrolysis by co-upgrading the by-products. The reaction of corncob char with simulated pyrolysis gas showed the feasibility of producing valuable CO and H-2 at suitable temperatures. The high reactivity of raw corncob biochar due to its high potassium content makes co-upgrading for syngas production feasible without further treatment.
Article
Chemistry, Multidisciplinary
Jennifer Martin-del-Campo, Marianna Uceda, Sylvain Coulombe, Jan Kopyscinski
Summary: The combination of rotating gliding arc and a spouted catalytic bed in a plasma-catalytic system for dry reforming of methane showed more stable operation using Al2O3-supported catalysts compared to SiO2. Using a catalytic bed in the plasma zone significantly increased selectivity towards CO and H2, reducing acetylene production in the process. The presence of a catalyst also greatly reduced the formation of soot and coke in the reactor, indicating potential for improving catalytic performance during DRM reactions.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Garance Gougeon, Kanchan Dutta, Rutika Savaliya, Jan Kopyscinski
Summary: The study revealed that NH3 favorably adsorbed on Ga2O3, with nitrogen being attracted towards gallium. The Ga2O3 surface was nitridated to GaN via adsorbed NH2*, NH* and H* intermediates, increasingly stabilized by the surface, preventing their early desorption, and testifying of the positive nitrogen (N) atom insertion into the crystal.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Bryce McGarvey, Natalia Semagina, Josephine M. Hill
Summary: 2020 and 2021 were significant years for the catalysis community in Canada. The Chemical Institute of Canada's Catalysis Division celebrated its 50th anniversary in 2021, while the Canadian Catalysis Foundation marked its 30th anniversary in 2020. Both organizations have played crucial roles in supporting and advancing the field of catalysis in Canada. This article provides an overview of the origins of these organizations and highlights their key contributions to the catalysis community.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Review
Multidisciplinary Sciences
Danilo Henrique da Silva Santos, Ye Xiao, Nhamo Chaukura, Josephine M. Hill, Rangabhashiyam Selvasembian, Carmem L. P. Silva Zanta, Lucas Meili
Summary: Activated carbon (AC) is widely used for removing pollutants from contaminated water, and advanced oxidative processes (AOP) show promise in regenerating the AC. However, there is a lack of reviews focusing on the use of AOP as AC regeneration technology, leading to limited exchange of information and ideas. Further research and development are necessary in this area.
Article
Engineering, Chemical
Vicente Montes, Ye Xiao, Jingfeng Wu, Josephine M. Hill
Summary: This study provides direct evidence of chemical penetration into petroleum coke particles during activation and reveals the relationship between porosity development, sulphur loss, and phase behavior. The results indicate the formation of a molten phase during heating, causing the release of sulphur and ash components from the petroleum coke. A better understanding of the activation process will enhance the efficiency of preparing activated carbon.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Varun Surendran, Mauro Bracconi, Jose A. Hernandez Lalinde, Matteo Maestri, Jan Kopyscinski
Summary: In this study, a catalytic plate reactor with a movable sampling capillary was developed to investigate the flow dynamics and study the kinetics of the CO2 methanation reaction over Ni/ Al2O3 catalyst. The results demonstrated that the reactor is suitable for collecting kinetic data with high spatial resolution for gas composition and catalyst surface temperature.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
John H. Jacobs, Nancy Chou, Kaylan H. McKelvie, Jerry A. Commodore, Ruohong Sui, Kevin L. Lesage, Kyle G. Wynnyk, Ye Xiao, Mark C. Biesinger, Josephine M. Hill, Robert A. Marriott
Summary: Activated carbons derived from petcoke have the potential to reduce sulfur dioxide and carbon dioxide emissions while utilizing a common waste product. A sodium hydroxide activated petcoke carbon showed high selectivity for H2S/CH4 and H2S/CO2 in adsorption experiments. The selectivity was influenced by the surface area and oxygen content of the activated carbons.
Article
Chemistry, Physical
Kanchan Dutta, Mohsen Shahryari, Chao-Jun Li, Jan Kopyscinski
Summary: In this study, the rate-limiting step for the direct non-oxidative methane coupling to ethylene over gallium-nitride catalysts, which is the second C-H bond cleavage in methane to form methylene, was investigated. Isotope labelled experiments, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), 13C solid state-NMR, and kinetic modelling were used to decipher the reaction mechanism. The results showed that the supported GaN/SBA-15 catalyst had more aliphatic surface intermediates (CH3* and CH2*) compared to unsupported GaN catalysts, which had higher amounts of aromatics intermediates and coke deposition. The kinetic study confirmed the likelihood of the reaction pathway involving the fast abstraction of the first H from CH4 to form methyl (CH3*) surface intermediates, followed by the slow second C-H bond cleavage to form methylene (CH2*) and subsequent coupling to ethylene.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Multidisciplinary
Andrew Carkner, Ingy Tageldin, Jiashuai Han, Ali Seifitokaldani, Jan Kopyscinski
Summary: Lignin, a sustainable alternative to petroleum, can be converted into valuable aromatic compounds through electrocatalytic upgrading. This study explores the impact of temperature and electrical potential on the formation rate of these products, finding that temperature has a much larger effect than electrical potential.
Article
Energy & Fuels
Bikashbindu Das, Ahmed Magdy Abdelaziz Ahmed, Josephine M. Hill, Sathish Ponnurangam
Summary: The use of metal-free carbonaceous catalysts for oxidative desulfurization faces limitations due to their low activation efficiency and researchers have explored peroxide-assisted oxidation as an alternative. In this study, a novel carbonaceous metal-free catalyst was synthesized from petcoke, a waste product from oil refining, through boron doping. The catalyst showed high sulfur removal efficiency and the doping-induced defects were identified as active sites for oxygen activation. The study provides insights into the development of efficient sulfur removal catalysts.
Article
Engineering, Chemical
Mohammad Ghavipour, Ralph Al Hussami, Kirill Levin, Ranjan Roy, Jan Kopyscinski
Summary: The role of template in the physicochemical properties of SAPO-34 was investigated using various templates in single- and mixed-template methods. The TEA-based sample was found to be a good substitute for TEAOH in single template SAPO, and both TEAOH/DEA and TEAOH/TEA-based samples showed acceptable performance. The catalyst's lifetime was mainly affected by the external surface area, while acidity and particle size played minor roles. In addition, the coke formation mechanism was proposed and confirmed using spectroscopy techniques.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Qing Huang, Natalia M. Cabral, Xing Tong, Annelisa S. Schafranski, Pierre Kennepohl, Josephine M. Hill
Summary: A series of solid acid catalysts derived from petroleum coke were prepared using nitric acid treatment with or without ball milling pretreatment. The catalysts exhibited high activity for the esterification of octanoic acid and methanol, with the activity dependent on the number of -SO3H acid sites, the total acidity, and the oxygen content.
Article
Chemistry, Multidisciplinary
Mohammad Ghavipour, Tiago J. J. Goncalves, Ralph Al Hussami, Ranjan Roy, Samira Siahrostami, Jan Kopyscinski
Summary: For the catalyst SAPO-34 used in the conversion of methanol to light olefins, micropores that promote higher light olefins selectivity are susceptible to blockage by coke, leading to fast catalyst deactivation. Alkali post-treatment was employed to introduce secondary mesopores and improve mass transfer, resulting in longer catalyst lifetime but slightly lower light olefins selectivity. The formation of heavier coke species over the treated catalysts was related to the alteration in active sites, with Lewis acid sites remaining intact while Bronsted acidity was depleted.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Mohsen Shahryari, Elmira Pajootan, Mohammad Ghavipour, Jan Kopyscinski
Summary: In this study, catalysts consisting of molybdenum, tungsten, and mixed metal oxide and nitride were synthesized and tested on a silica support. The results showed that the nitride catalysts had a lower coke formation rate and higher selectivity towards ethylene, while the Mo/SBA-15 and MoW/SBA-15 catalysts had higher selectivity towards benzene and a faster coke formation rate.
Article
Chemistry, Physical
Jan Ilsemann, Mangir M. Murshed, Thorsten M. Gesing, Jan Kopyscinski, Marcus Baeumer
Summary: The influence of support basicity on Ru-catalyzed CO2 methanation was investigated, with different types of basic surface sites on the support playing a significant role in catalytic behavior. Basic supports can contribute to catalytic turnover by opening new pathways or promoting existing ones, depending on the type, density, and strength of basic sites available, which varies with temperature.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)