Article
Energy & Fuels
Ali Bahari, Kazem Atashkari, Javad Mahmoudimehr
Summary: This study optimized a MSW-driven gasifier using a combination of computational fluid dynamics (CFD) approach, response surface method (RSM), and genetic algorithm (GA), taking into account efficiency and environmental effects. The research investigated the influence of major parameters on the gasifier's performance and identified the optimal set of design variables with a focus on both efficiency and emission levels.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Environmental
Jianjun Cai, Ronghua Zeng, Wenheng Zheng, Shubin Wang, Jie Han, Kaiqiang Li, Ming Luo, Xingying Tang
Summary: The co-gasification of RDF and biomass is an efficient technology for MSW utilization, with higher temperature and ER values promoting syngas yield. Co-gasification demonstrated synergistic enhancements in carbon conversion efficiency, gas yield, and cold gas efficiency. Positive synergy effects were observed at lower ER and higher temperatures, while negative synergy effects tended to appear at higher ER values.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Xiaoping Jia, Zetian Zhang, Fei Wang, Zhiwei Li, Yutao Wang, Kathleen B. Aviso, Dominic Y. C. Foo, Purusothmn Nair S. Bhasker Nair, Raymond R. Tan, Fang Wang
Summary: Countries worldwide are actively addressing the current climate crisis, with negative emissions technologies like enhanced weathering expected to play a significant role. Enhanced weathering involves the application of powdered silicate minerals to remove CO2 from the atmosphere, improving soil quality and addressing industrial waste management.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Environmental Sciences
Yafeng Wang, Yuegang Tang, Ruiqing Li, Xin Guo, John P. Hurley, Robert B. Finkelman
Summary: Solid wastes from commercial coal gasification plants in China pose a significant environmental issue due to the large quantities produced. Hazardous trace elements in the residues show different release patterns, with some exceeding regulatory limits. Risk assessment indicates medium risk to the ecosystem, highlighting the need for consideration of potential environmental pollution from coal gasification plants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Ahmad Reza Salehiyoun, Hamid Zilouei, Mohammad Safari, Francesco Di Maria, Seyed Hashem Samadi, Omid Norouzi
Summary: This study investigates the effect of biochar addition on the dry anaerobic digestion of organic solid waste. The results show that adding biochar can enhance methane production and yield, control acidification, and shorten the lag phase. However, the synergistic effects at higher biochar doses are limited, and organic waste with a higher C/N ratio obtains less benefits.
Article
Environmental Sciences
A. Muscolo, F. Romeo, F. Marra, C. Mallamaci
Summary: This study focused on recycling different types of pollutant wastes to limit landfill, reduce greenhouse gas emissions, and produce organic-mineral fertilizers. Sulphur-based pads improved soil quality, especially when containing orange residues. Onion and Garlic grew better and had improved quality, in terms of antioxidant compounds and capacity, in the presence of sulphur-based pads and orange residues.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Energy & Fuels
Prysathryd Sarabhorn, Panawit Sitthichirachat, Chootrakul Siripaiboon, Chanoknunt Khaobang, Prachya Palay, Tanaporn Thapsamut, Haryo Wibowo, Chinnathan Areeprasert, Fabrizio Scala
Summary: This study comprehensively evaluated the gasification of wood pellets in a pilot-scale decoupling gasifier. The results showed that the decoupling gasifier had lower temperatures in all zones compared to the conventional updraft gasifier. The tar yield from the decoupling gasifier was significantly lower, but the lower heating value (LHV) of syngas was also lower than that from updraft gasification. Kinetics and thermodynamics analysis suggested that the energy requirement for wood pellet decomposition was slightly higher in the decoupling gasifier due to its higher activation energy, and the presence of CO2 in the flue gas atmosphere caused more heavy volatiles and char.
Article
Agricultural Engineering
Anjan M. Augustine, Christus Jeya Singh, Joseph S. Sekhar
Summary: The utilization of agricultural waste, such as groundnut shell, for biomass energy conversion can help meet energy demand in rural areas. Mixing groundnut shell with spent tea waste has been shown to improve gasification efficiency and increase gas calorific value.
BIOMASS & BIOENERGY
(2021)
Article
Engineering, Environmental
Mohammed El Ibrahimi, Ismail Khay, Anas El Maakoul, Mohamed Bakhouya
Summary: This study proposes and evaluates three waste management strategies for treating agro-industrial wastes in North African countries. The findings show that the AD plants would be profitable in Morocco and Algeria, reduce carbon emissions, and be financially feasible in Tunisia with the adoption of a specific waste management strategy.
Article
Engineering, Environmental
Jianjun Cai, Wenheng Zheng, Ming Luo, Xingying Tang
Summary: The moving-grate gasifier offers significant advantages in optimizing thermochemical conversion efficiency and is suitable for processing biomass waste. The gasification performance of large-scale moving-grate gasifiers outperforms that of small-scale ones.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Xiaobin Qi, Qiyao Yang, Weijian Song, Zhiping Zhu, Qinggang Lyu
Summary: The gasification fly ash (GFA), a bulk industrial solid waste from coal gasification process, was effectively disposed by conducting fluidized activation experiments in a bench-scale CFB test rig and steam activation experiments in a vertical tube furnace. The results showed that the pore structure of GFA developed in a matter of seconds and the specific surface area (SBET) increased with temperature, reaching a maximum increase of 48.9% and a value of 204 m2/g. The GFA exhibited an activation potential of 362 m2/g (SBET) through steam activation.
Article
Thermodynamics
Yisheng Hu, Kang Pang, Longhao Cai, Zhibin Liu
Summary: The study simulated air and air-steam co-gasification of switchgrass and municipal solid waste using Aspen Plus software, analyzing the effects of co-gasification and steam/feed ratios on gas composition and gasification performance. Results showed higher gasification efficiency and product yield under specific conditions, but some parameters exhibited a decrease in performance with increasing CGR and S/F ratios.
Article
Green & Sustainable Science & Technology
Shakirudeen A. Salaudeen, Bishnu Acharya, Animesh Dutta
Summary: This study numerically investigated the steam gasification of hydrochar derived from fruit wastes using Aspen Plus. The results showed that hydrothermal carbonization increased the CO content and decreased the CO2 content of the syngas, while HHV increased with pressure. Temperature had an impact on the composition of the syngas.
Article
Engineering, Environmental
Huiyang Bi, Chunhui Deng, Lihao Chen, Xuesong Zhao, Zhongjian Li, Yang Hou, Lecheng Lei, Bin Yang
Summary: Replacing coal with industrial organic waste in high temperature gasification to produce syngas is a viable method to reduce carbon emissions. This study developed novel numerical models to simulate the formation and control of HCl in Texaco gasifier, taking chlorine-containing substances as dichloromethane for mass transfer description during gasification. The models showed good accuracy with a minimum error of 0.55% in predicting syngas components. The simulation revealed that HCl was mainly generated near the nozzle, and increasing CaO amount and decreasing particle size had a positive effect on dechlorination. However, excessively reducing CaO size below 0.1 mm decreased its promoting effect, and high temperature in the flame zone inhibited the dechlorination reaction. Therefore, the developed models provided feasibility for optimizing operating conditions and reducing chlorine corrosion and improving stability during the gasification of organic hazardous waste.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Jan A. Stasiek, Jacek Baranski, Marcin Jewartowski, Jan Wajs
Summary: The research focuses on the development of a new technological process for the thermochemical conversion of biomass and communal waste, aiming for higher thermal efficiency and lower emission of harmful compounds.
Article
Chemistry, Physical
M. P. Bracciale, B. de Caprariis, P. De Filippis, A. D. Hernandez, M. Scarsella
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Environmental Sciences
Luca Di Palma, Irene Bavasso, Mauro Capocelli, Paolo De Filippis, Vincenzo Piemonte
Article
Energy & Fuels
Benedetta de Caprariis, Claudia Bassano, Maria Paola Bracciale, Paolo Deiana, Asbel David Hernandez, Maria Laura Santarelli, Marco Scarsella, Paolo De Filippis
Article
Environmental Sciences
B. de Caprariis, M. P. Bracciale, I Bavasso, G. Chen, M. Damizia, V Genova, F. Marra, L. Paglia, G. Pulci, M. Scarsella, L. Tai, P. De Filippis
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Review
Agricultural Engineering
Marco Scarsella, Benedetta de Caprariis, Martina Damizia, Paolo De Filippis
BIOMASS & BIOENERGY
(2020)
Article
Energy & Fuels
Paolo De Filippis, Livio D'Alvia, Martina Damizia, Benedetta de Caprariis, Zaccaria Del Prete
Summary: Hydrogen plays a key role in the energy transition, and the steam iron process can produce pure H-2 for hydrogen applications. Ethanol as a reducing agent has potential, but the deposition of coke must be avoided. The addition of MnO2 can enhance the reduction degree of iron oxides, increasing H-2 yield and process efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Lingyu Tai, Benedetta de Caprariis, Marco Scarsella, Paolo De Filippis, Francesco Marra
Summary: The study investigated the use of zero-valent metals as hydrogen producers and hydrodeoxygenation catalysts in the hydrothermal liquefaction of oak wood for bio-crude production. The results showed a significant increase in bio-crude yields with the use of hydrogen producers, particularly Fe, and an enhancement in bio-crude quality with a synergic effect between hydrogen producers and catalysts. The hydrogenation extent was proven by changes in the bio-crude composition, indicating the potential for improved bio-crude quality.
Article
Chemistry, Analytical
Benedetta de Caprariis, Marco Scarsella, Irene Bavasso, M. Paola Bracciale, Lingyu Tai, Paolo De Filippis
Summary: Understanding the behavior of cellulose in hydrothermal conditions with the assistance of different transition metals is crucial for comprehending the lignocellulosic biomass liquefaction mechanism. The addition of Ni, Fe, and Zn during hydrothermal liquefaction of cellulose showed varying effects on bio-crude yield and quality. Fe was found to be the most effective in increasing bio-crude yield and higher heating value, while Zn led to an increase in water-soluble products.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Multidisciplinary
Riccardo Polini, Andrea Marcucci, Cadia D'Ottavi, Patrizia Nunziante, Paolo De Filippis, GianCarlo Marcheselli
Summary: Tungsten carbide (WC) is a crucial tungsten compound, widely used in engineering due to its combination of high hardness and strength with the toughness and plasticity of WC-Co cermet composites. Direct synthesis of WC from tungsten concentrate through carbothermic reduction has been achieved, allowing for significant energy savings and reduced CO2 emissions compared to traditional methods. The new process also results in lower amounts of industrial waste, making it a more sustainable option for producing WC powders for cemented carbides.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Benedetta de Caprariis, Martina Damizia, Paolo De Filippis, Maria Paola Bracciale
Summary: In this study, the effect of promoters on the stability of iron redox cycles for H2 production was investigated. The results showed that MgO had the highest activity and cyclability, enhancing the thermal stability of the system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Lingyu Tai, Sogand Musivand, Benedetta de Caprariis, Martina Damizia, Roya Hamidi, Wenchao Ma, Paolo De Filippis
Summary: Plastic nylon 66, ethylene-vinyl acetate (EVA) and polyvinyl chloride (PVC) were treated in subcritical water to produce valuable liquid chemicals and clean solid fuels. Co-treatment of PVC and the other two plastics showed a synergistic effect. Nylon 66 and EVA required higher temperatures for complete hydrolysis, while PVC dechlorination was achieved at a relatively low temperature. The hydrochloric acid released from PVC acted as a catalyst, significantly accelerating the hydrolysis of nylon 66 and EVA.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Lingyu Tai, Roya Hamidi, Benedetta de Caprariis, Martina Damizia, Laura Paglia, Marco Scarsella, Ramin Karimzadeh, Paolo De Filippis
Summary: The catalytic hydrotreating of guaiacol using bifunctional catalysts supported on chemically modified zeolites with increased mesoporosity showed enhanced conversion rate and catalytic performance. However, the catalyst exhibited a decrease in performance after multiple consecutive runs, attributed to the oxidation of Ni active site, coking, and zinc oxide contamination.
Article
Chemistry, Physical
Maria Paola Bracciale, Martina Damizia, Paolo De Filippis, Benedetta de Caprariis
Summary: This study proposes a cleaning method system based on tar physical adsorption and a chemical looping process to convert biomass into syngas. The system effectively removes tar and contaminants and produces pure H2 and CO.
Article
Engineering, Chemical
Ikram Eladnani, Maria Paola Bracciale, Martina Damizia, Seyedmohammad Mousavi, Paolo De Filippis, Rajae Lakhmiri, Benedetta de Caprariis
Summary: The study investigated the catalytic hydrothermal liquefaction of Brachychiton populneus biomass seed, using Ni and Fe as catalysts. The highest bio-crude yields were achieved at 330 degrees C and 10 min of reaction time, with Ni/Al2O3 as catalyst and Fe as hydrogen donor. The combination of Fe and Ni/Al2O3 favored the conversion of fatty acids into hydrocarbons, increasing their amount in the bio-crude to approximately 20%.
Article
Chemistry, Physical
Martina Damizia, Maria P. Bracciale, Francesco Anania, Lingyu Tai, Paolo De Filippis, Benedetta de Caprariis
Summary: Chemical Looping Hydrogen (CLH) enables the direct production of pure hydrogen using the redox properties of Fe and various reductants. This study successfully produced a highly pure hydrogen stream for Proton Exchange membrane Fuel Cells using bioethanol as a renewable fuel. The impact of temperature and chemical composition of Fe-based particles on carbon formation during the reduction step was thoroughly examined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
