Article
Energy & Fuels
Li Yang, Wenbin Chen, Chen Song, Caifu Li, Jinlong Chen, Xi Zhang, Fang Liu
Summary: Chemical looping combustion (CLC) is a technique that utilizes oxygen carriers (OCs) to transfer oxygen and heat between fuel reactor and air reactor. The attrition of OCs is a major impediment to the large-scale application of CLC technology. In this study, the effects of different biomass ashes on the reactivity and attrition resistance of red mud OCs were investigated. The results showed that the rape straw ash promoted the reactivity of OCs, while the bagasse ash improved the attrition resistance. The corn straw ash was found to be an effective material for strengthening the skeleton structure of OCs, enhancing both reactivity and attrition resistance.
Article
Chemistry, Applied
Benjamin Fleiss, Stefan Penthor, Stefan Mueller, Hermann Hofbauer, Josef Fuchs
Summary: This study aims to develop a fast and cost-effective characterization scheme for oxygen carriers under operational conditions in order to assess the comparability of different materials. Three oxygen carriers were investigated in detail in a laboratory-fluidized bed and compared with operation in an 80 kW pilot plant. The results show that bed material properties such as attrition, density, and bulk density must be prioritized in the evaluation of oxygen carriers.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Shouxi Jiang, Laihong Shen, Jingchun Yan, Xin Niu, Bin Hu
Summary: The study investigated Cu-Fe bimetallic oxygen carriers (OCs) supported by SiO2, Al2O3, or hematite in a fluidized-bed reactor. It was found that CuFe-He and CuFe-Al OCs performed better than CuFe-Si OC, with the latter leading to deactivation due to irreversible interaction. Hematite was identified as an excellent support candidate for manufacturing Cu-Fe OCs. Additionally, maintaining a high O/C ratio and increasing reaction temperature above 850 degrees C promoted coal conversion efficiency in chemical looping combustion.
Article
Energy & Fuels
Fang Liu, Weiliao Kang, Chen Song, Zhixuan Jia, Wenbin Chen, Li Yang
Summary: This study conducted experiments to investigate the attrition behavior of an iron-based oxygen carrier under different conditions in chemical looping combustion, revealing the importance of chemical stress on attrition and proposing the attrition mechanism of the oxygen carrier. The results show a dynamic increase process of contribution of chemical stress to attrition and a dominance of chemical stress after a certain number of cycles, indicating the significance of understanding and managing chemical stress in optimizing the performance of chemical looping combustion systems.
Article
Chemistry, Applied
Viktor Andersson, Amir H. Soleimanisalim, Xiangrui Kong, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: The study investigates the interactions between alkali and an oxygen carrier in Chemical-Looping Combustion (CLC) to better understand the fate of alkali in the process. Results show that alkali uptake is limited under oxidizing conditions but significant during stable reducing conditions.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Daofeng Mei, Anders Lyngfelt, Henrik Leion, Tobias Mattisson
Summary: Chemical looping combustion (CLC) is a technology that can generate heat and power while capturing CO2. Using biomass in CLC (bio-CLC) allows for negative CO2 emissions. This study investigates the interaction between alkalis in biomass and the process, focusing on charcoal impregnated with alkali chlorides. The results show that impregnation with alkalis improves the gasification rate, with carbonates resulting in earlier and more permanent defluidization compared to chlorides. Partial agglomeration and retention of alkalis in the oxygen carrier are observed, with similar reactivity noticed with CH4 and H2.
Article
Thermodynamics
Li Yang, Caifu Li, Chen Song, Dan Zhu, Jiangyuan Zhao, Fang Liu, Xiaorui Liu
Summary: The migration path of the oxygen carrier plays a crucial role in the reaction rate of chemical looping combustion technology. In this study, the oxygen migration paths of different lattice structures were studied using density functional theory, and their kinetic parameters and activation energy changes were explored.
Article
Chemistry, Applied
Ivan Gogolev, Toni Pikkarainen, Juho Kauppinen, Markus Hurskainen, Anders Lyngfelt
Summary: The chemical looping combustion of wood pellets, wood char, and straw pellets with different oxygen carriers was studied to investigate alkali emissions. Different fuel types and oxygen carriers had varying impacts on the particle size distributions and stable alkali species compositions. Thermodynamic modeling predicted the stability of different alkali species at 800 degrees Celsius for each fuel type.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Viktor Andersson, Xiangrui Kong, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: This study evaluates a novel laboratory-scale fluidized bed reactor for chemical looping combustion (CLC) studies. The reactor design takes into consideration the complex interactions between alkali compounds and reactor walls and is guided by computational fluid dynamic simulations. The experimental results demonstrate that the reactor has significantly improved functionality compared to a previously used reactor, allowing for detailed investigations of interactions between alkali compounds and oxygen carriers used in CLC.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chunqiang Lu, Rongrong Deng, Ruidong Xu, Yannan Zhao, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: The CeO2/MnCo2O4 oxygen carrier significantly improves the redox stability for methane combustion in Chemical Looping Combustion (CLC). Among different compositions, the 10% CeO2/MnCo2O4 sample shows the highest stability during successive CLC testing, with a methane combustion capacity of 2.22 mmol/g and average methane conversion rate of over 90%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
M. de las Obras Loscertales, A. Abad, F. Garcia-Labiano, L. F. de Diego, P. Gayan, J. Adanez
Summary: Four different physico-chemical characteristics of Ca-based sorbents were evaluated as suitable precursors for CaSO4-based oxygen carriers in CLC systems.
Article
Engineering, Environmental
Amr Abdalla, Mansour Mohammedramadan Tijani, Mohanned Mohamedali, Nader Mahinpey
Summary: This study investigated the effects of introducing WO3 into NiO/ZrO2 oxygen carriers for methane CLC, and found that the dual metal oxide oxygen carriers exhibited enhanced oxygen capacity and lower carbon formation compared to their monometallic counterparts. The introduction of WO3 into the NiO/ZrO2 lattice structure led to the formation of an intermediate phase (NiWO4) which improved oxygen carriers' reducibility and metal dispersion. Impregnation synthesis method showed superior performance in terms of cyclic stability and coking resistance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Barnali Bhui, Banabir Das, V Prabu
Summary: Electronic waste poses a serious threat to the environment, but the metals and polymers in PCB boards can be used as potential oxygen carriers in the chemical looping combustion process. Experimental studies demonstrate the feasibility of utilizing PCB based oxygen carriers in CLC for environmental sustainability.
Article
Engineering, Environmental
Clemens F. Patzschke, Matthew E. Boot-Handford, Qilei Song, Paul S. Fennell
Summary: The study found that copper manganese spinel oxides are promising oxygen carriers for the CLOU and CLAS processes due to their high O-2 release capacity and fast release kinetics. Material properties of oxygen carriers can be improved by adjusting Cu:Mn ratios and synthesis conditions to optimize performance. After extended cycling tests, the oxygen carriers showed excellent stability and high resistance to attrition.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Ivana Stanicic, Emil Ola Lidman Olsson, Hao Wu, Peter Glarborg, Inaki Adanez-Rubio, Henrik Leion, Tobias Mattisson
Summary: In this study, the interaction between zinc compounds and ilmenite particles was investigated by exposing three types of ilmenites to gas-phase Zn and ZnCl2. The results showed that the gaseous conditions, particle ash layer composition, and iron availability played an important role in the interaction between zinc compounds and ilmenite particles.
Article
Energy & Fuels
Sirpa Rahiala, Jouni Ritvanen, Timo Hyppanen, Toni Pikkarainen
Article
Engineering, Chemical
Kari Myohanen, Timo Hyppanen, Toni Pikkarainen, Timo Eriksson, Arto Hotta
CHEMICAL ENGINEERING & TECHNOLOGY
(2009)
Article
Energy & Fuels
Sirpa Takkinen, Timo Hyppanen, Jaakko Saastamoinen, Toni Pikkarainen
Article
Energy & Fuels
Sirpa Rahiala, Timo Hyppanen, Toni Pikkarainen
Article
Engineering, Chemical
Jaakko Saastamoinen, Toni Pikkarainen, Antti Tourunen, Marko Rasanen, Timno Jantti
Article
Green & Sustainable Science & Technology
Tomi J. Lindroos, Magnus Ryden, Oyvind Langorgen, Esa Pursiheimo, Toni Pikkarainen
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2019)
Article
Engineering, Environmental
Antonio Soria-Verdugo, Juho Kauppinen, Teemu Soini, Luis Miguel Garcia-Gutierrez, Toni Pikkarainen
Article
Chemistry, Physical
Hassan A. Alabdrabalameer, Martin J. Taylor, Juho Kauppinen, Teemu Soini, Toni Pikkarainen, Vasiliki Skoulou
SUSTAINABLE ENERGY & FUELS
(2020)
Proceedings Paper
Green & Sustainable Science & Technology
Janne Karki, Eemeli Tsupari, Tomi Thomasson, Antti Arasto, Toni Pikkarainen, Matti Tahtinen, Risto Sormunen, Timo Korpinen
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
(2017)
Proceedings Paper
Green & Sustainable Science & Technology
Hannu Mikkonen, Jari Lappalainen, Toni Pikkarainen, Reijo Kuivalainen
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
(2017)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.