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
Shuoxin Zhang, Yuchuan Feng, Xin Guo
Summary: The study found that copper doping enhanced the activities of iron-based oxygen carriers, but excessive copper would reduce their reactivity due to melting and agglomeration. Hydrogen temperature-programmed reduction (H-2-TPR) analysis, fixed-bed experiments, and density functional theory (DFT) calculations confirmed that Cu promoted the deep reduction of Fe2O3. The oxygen carrier doped with 1 wt % CuO was the most suitable material for CLH, with the highest hydrogen yield sustained at a high and stable level in multiple redox cycles.
Article
Energy & Fuels
Masoumeh Khanchi, Seyed Mohammad Ali Mousavian, Saeed Soltanali
Summary: The experimental results show that SiO2-Al2O3-based catalysts perform better than SiO2 and Al2O3-based catalysts, with the best performance observed at lower Si/Al ratios.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Inaki Adanez-Rubio, Tobias Mattisson, Marijke Jacobs, Juan Adanez
Summary: Chemical Looping with Oxygen Uncoupling (CLOU) is a technology that separates the oxygen for fuel combustion using an oxygen carrier in a fuel reactor. This study investigates the behavior of Mn/Mg/Si system as oxygen carriers for CLOU. The most reactive oxygen carriers without Si in the structure were found to be M24Mg76 and M48Mg51. These carriers showed good reactivity and mechanical stability in a batch fluidized bed reactor.
Article
Engineering, Environmental
Avishek Goel, Arnold Ismailov, Elyas M. Moghaddam, Chao He, Jukka Konttinen
Summary: Biomass Chemical Looping Gasification (BCLG) is a cost-effective and efficient alternative to conventional gasification. The study investigated various oxygen carriers (OCs), including industrial wastes, residential waste, and natural ore, and evaluated their reactivity, selectivity, material strength, and sintering behavior. Nickel slag calcined at 1100 degrees C was identified as the most promising OC material for BCLG, with optimal reactivity, selectivity, material strength, and minimal sintering.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Zhiyuan Yang, Yane Zheng, Kongzhai Li, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei
Summary: A series of La-Mn-Fe-O perovskite oxides were successfully prepared and used for Chemical-looping reforming of methane. The La0.85MnFe0.15O3-800 showed better structural and thermal stability during 9 cycled reactions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Review
Energy & Fuels
Guicai Liu, Grzegorz Lisak
Summary: This review summarizes the basic properties and opportunities of Cu-based OCs in various chemical looping processes. It covers the applications of Cu-based OCs in chemical looping combustion (CLC), chemical looping oxygen uncoupling (CLOU), chemical looping air separation (CLAS), chemical looping for syngas/H2 production, integrated CaO/CuO looping process, and thermochemical energy storage (TCES). The review also discusses the technical challenges and current strategies related to agglomeration, attrition, and ash accumulation. It provides insights and guidance for the design and development of Cu-based OCs and their applications in chemical looping processes.
Article
Chemistry, Applied
Enkang Fu, Feng Gong, Sijun Wang, Chaozhen Liu, Peng Yang, Yuhang Jing, Rui Xiao
Summary: Chemical looping ammonia production (CLAP) technology allows for the optimization of operating conditions via stepwise reactions. A study investigated the effect of Ni doping on the performance of NH3 production using Ni-Mn-N composite nitrogen carriers and found that low level Ni doping enhances activity and selectivity. This study provides new insights for the design of composite nitrogen carriers to improve ammonia production in CLAP.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mengting Chen, Qifeng Zhong, Meihua Zhang, Hao Huang, Yingxin Liu, Zuojun Wei
Summary: In this study, a RuMn/Al2O3-SiO2 multifunctional catalyst was prepared and efficiently converted lignin-derived phenols into cyclohexanol through aqueous partial hydrodeoxygenation (HDO). The high performance of the RuMn/Al2O3-SiO2 catalyst can be attributed to the synergistic effects of highly dispersed Ru nanoparticles with small size, the microsphere structure, appropriate acid sites from Al2O3-SiO2, and acid-base sites from MnOx.
CATALYSIS COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Niels Michiel Moed, Ming-Hung Chiang, Young Ku, Yao-Hsuan Tseng
Summary: Fe2O3-CuO/Al2O3 oxygen carriers were fabricated and examined for chemical looping applications with hydrogen and carbon monoxide. Higher conversion was observed with hydrogen, and sintering occurred after reduction with carbon monoxide but not with hydrogen. The mechanical strength of the oxygen carriers improved with calcination temperature.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Muhammad Qasim, Muhammad Ayoub, Aqsha Aqsha, Muhammad Zulfiqar
Summary: Efficient oxygen carriers in chemical looping combustion have achieved significant progress in CO2 capture. Various types of oxygen carriers were prepared and characterized using different techniques. The Pr/Ce/gamma-Al2O3-based oxygen carriers showed higher thermal stability and excellent oxygen capacity.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Energy & Fuels
Ping Wang, Bret Howard, Nicholas Means
Summary: The study reveals that Fe40Cu20 and Fe20Cu40 oxygen carriers exhibit different performances under varying conditions, with Fe20Cu40 showing better results in CLOU compared to Fe40Cu20 in iG-CLC.
Article
Energy & Fuels
Ying Li, Yanan Wang, Kunlei Liu, Haibo Zhao
Summary: This study explores the advantages of Cu/Fe-based composite oxygen carriers in terms of cyclic reactivity and kinetic parameters, providing guidance and optimization methods for the design of low-cost oxygen carriers.
Article
Chemistry, Physical
Zhenzhou Zhang, Sifan Cheng, Wenqi Liu, Baojian Chen, Xinhua Gao, Peng Wang, Jian Gao, Yisheng Tan, Shanshan Dang, Weifeng Tu
Summary: By using reaction kinetics, TPR/TPD, N2O titration experiments, and in situ spectra techniques, this study reveals the mechanism of Mn promoter in regulating the catalytic activity and surface properties of Cu/ZnO/Al2O3 catalysts. The addition of Mn does not affect the methanol synthesis pathways, as confirmed by the unchanged methanol formation EA of Cu/ZnO/Al2O3 catalyst. However, an increase in Mn content leads to smaller sizes of Cu and ZnO, higher reduction degree of ZnO to Zn0, and more Cu-ZnOx active sites and surface species, resulting in higher methanol formation activity in CAZ-2%Mn.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Thermodynamics
Kun Wang, Yunwei Zhang, Meng Xue, Ziyu Wang, Jiaze Xi
Summary: With the increasing demands on syngas quality, investigations on oxygen carriers, such as the proposed double-effect oxygen carrier in this study, have become more significant. The experiments and kinetic models demonstrate the stability and effectiveness of the oxygen carrier in enhancing gasification rate and capturing CO2.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
Pobitra Halder, Sazal Kundu, Savankumar Patel, Mojtaba Hedayati Marzbali, Rajarathinam Parthasarathy, Kalpit Shah
BIOENERGY RESEARCH
(2020)
Article
Agronomy
Pacian Netherway, Gabriel Gasco, Ana Mendez, Aravind Surapaneni, Suzie Reichman, Kalpit Shah, Jorge Paz-Ferreiro
Article
Environmental Sciences
Anithadevi Kenday Sivaram, Panneerselvan Logeshwaran, Aravind Surapaneni, Kalpit Shah, Nicholas Crosbie, Zoe Rogers, Elliot Lee, Kartik Venkatraman, Kurunthachalam Kannan, Ravi Naidu, Mallavarapu Megharaj
Summary: The study found that PFOS has significant cytotoxic and genotoxic effects on Allium cepa root meristem cells. As the concentration increases, cell division decreases and chromosomal aberrations increase. This is the first study to investigate the cyto-genotoxic potential of PFOS in higher plants.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2021)
Article
Chemistry, Physical
Sudhakar Pabba, Alka Kumari, Mary Gold Ravuri, Prathap Kumar Thella, Bankupalli Satyavathi, Kalpit Shah, Sazal Kundu, Suresh Kumar Bhargava
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Engineering, Environmental
Sirajum Monira, Muhammed A. Bhuiyan, Nawshad Haque, Kalpit Shah, Rajeev Roychand, Faisal Hai, Biplob Kumar Pramanik
Summary: This study investigates the sources, removal methods, and technical challenges of microplastic pollution in the water environment. It is found that constructed wetlands have limited effectiveness in removing MPs, leading to untreated stormwater releasing significant amounts of MPs into open water bodies. Future opportunities include the installation of membrane- or flotation-based technologies in the outlet of constructed wetlands for enhanced removal efficiency of MPs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
Mojtaba Hedayati Marzbali, Amir Saberi, Pobitra Halder, Jorge Paz-Ferreiro, Srinivasaiah Dasappa, Kalpit Shah
Summary: Hydrothermal carbonization of paunch waste was studied in batch mode, showing the ability to effectively manage wet waste. Analysis revealed different compounds in the bio-oil produced, and a reaction network with 12 pathways was suggested. Kinetic modeling was performed to assess the impact of reaction parameters on the products.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Karma Zuraiqi, Ali Zavabeti, Jonathan Clarke-Hannaford, Billy James Murdoch, Kalpit Shah, Michelle J. S. Spencer, Chris F. McConville, Torben Daeneke, Ken Chiang
Summary: This study reports a method for the direct conversion of CO2 to solid carbon utilizing EGaIn liquid metal alloy. The method allows for low-temperature reduction of CO2, producing highly selective solid carbon. The generated carbon naturally accumulates on the top of the alloy, making it easy to collect.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Nazia Hossain, Sabzoi Nizamuddin, Periasamy Selvakannan, Gregory Griffin, Srinivasan Madapusi, Kalpit Shah
Summary: In this study, mesoporous materials based on rice husk were prepared using different methods, and comprehensive analyses were conducted to compare their characteristics. The results showed that the surface area of the materials increased after KOH activation, indicating improved stability and adsorption performance.
Article
Engineering, Environmental
Mojtaba Hedayati Marzbali, Ibrahim Gbolahan Hakeem, Kalpit Shah
Summary: This article mainly introduces a novel approach of hydrothermal carbonisation (HTC), which aims to enhance the quality and utilisation of products. Magnetite nanoparticles were found on the surface of hydrochar, and magnetic hydrochar showed a strong adsorption capacity. It was estimated that the HTC plant could operate in an energy-neutral mode with a net present value of US$13.04 MM for 30 years.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Multidisciplinary Sciences
Tien Ngo, Leadin S. Khudur, Christian Krohn, Soulayma Hassan, Kraiwut Jansriphibul, Ibrahim Gbolahan Hakeem, Kalpit Shah, Aravind Surapaneni, Andrew S. Ball
Summary: This study investigated the effects of adding wood biochar on the anaerobic digestion of chicken manure under conditions of ammonia inhibition. The results showed that adding 5% acid-alkali-treated wood biochar by volume could achieve methane production levels close to the typical range of chicken manure. The treated wood biochar also exhibited the highest removal of total ammonia nitrogen compared to the control treatment. Microscopic observations and molecular biology analysis revealed the mechanisms by which acid-alkali-treated wood biochar improved anaerobic digestion performance.
Article
Engineering, Environmental
G. K. Veluswamy, K. Shah, A. S. Ball, A. J. Guwy, R. M. Dinsdale
Summary: There are concerns over the long-term sustainability of anaerobic digestion for producing methane, while the production of VFAs as a high value product offers promising opportunities for future wastewater treatment plants.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Mojtaba Hedayati Marzbali, Jorge Paz-Ferreiro, Sazal Kundu, Mohammad Ramezani, Pobitra Halder, Savankumar Patel, Troy White, Srinivasan Madapusi, Kalpit Shah
Summary: This study found that higher bio-oil yield can be obtained from paunch waste under relatively mild hydrothermal carbonisation conditions, which is mainly due to the fragile nature of paunch waste, higher water, volatile matter, and carbohydrate content, and lower lignin and ash content. The resulting hydrochar has a higher heating value and BET surface area, making it suitable as a coal substitute or porous medium in various applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Paper & Wood
Pobitra Halder, Sazal Kundu, Savankumar Patel, Mojtaba Hedayati Marzbali, Rajarathinam Parthasarathy, Kalpit Shah
Summary: The study focuses on comparing renewable choline cation-based ionic liquids (ILs) with imidazolium cation-based ILs for delignification performance, where choline cation-based ILs showed higher effectiveness in lignin and hemicellulose removal, resulting in increased volatile matter and reduced fixed carbon in regenerated cellulose-rich material. Choline-based ILs also enhanced the production of furfural and levoglucosenone, while imidazolium-based ILs, particularly 1-ethyl-3-methylimidazolium acetate, produced gamma-butyrolactone due to higher content of amorphous cellulose. Overall, ILs pre-treatment can favor the selective production of platform chemicals via pyrolysis route.
Article
Chemistry, Physical
Savankumar Patel, Sazal Kundu, Pobitra Halder, Mojtaba Hedayati Marzbali, Ken Chiang, Aravind Surapaneni, Kalpit Shah
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Review
Biotechnology & Applied Microbiology
Savankumar Patel, Sazal Kundu, Pobitra Halder, Nimesha Ratnnayake, Mojtaba Hedayati Marzbali, Shefali Aktar, Ekaterina Selezneva, Jorge Paz-Ferreiro, Aravind Surapaneni, Cicero Celio de Figueiredo, Abhishek Sharma, Mallavarapu Megharaj, Kalpit Shah
REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY
(2020)