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1,755 Results Found

  • Proceeding Paper
  • Open Access
2 Citations
2,908 Views
5 Pages

15 July 2024

There is a lack of innovation and process development in the post-harvest processing of coffee. The prevailing methods, such as wet washing, semi-dry/honey and natural drying, are still used to improve the sensory quality of coffee. Little attention...

  • Article
  • Open Access
1 Citations
2,049 Views
23 Pages

11 February 2025

In Namibia, informal settlements are usually upgraded by a participatory process aimed at providing inhabitants with land tenure security through the Flexible Land Tenure Act (FLTA), followed by the provision of basic services. The pilot FLTA impleme...

  • Article
  • Open Access
7 Citations
2,401 Views
31 Pages

13 July 2023

Exploiting a comparative advantage through resource endowment is a way to promote the transformation and upgrading of enterprises and high-quality economic development. Based on resource-based theory, this paper takes the listed companies of China&rs...

  • Article
  • Open Access
10 Citations
3,348 Views
18 Pages

Use of Nickel Oxide Catalysts (Bunsenites) for In-Situ Hydrothermal Upgrading Process of Heavy Oil

  • Jiménez Padilla Pedro Alonso,
  • Richard Djimasbe,
  • Rustem Zairov,
  • Chengdong Yuan,
  • Ameen A. Al-Muntaser,
  • Alexey Stepanov,
  • Guliya Nizameeva,
  • Alexey Dovzhenko,
  • Muneer A. Suwaid and
  • Almaz L. Zinnatullin
  • + 1 author

12 April 2023

In this study, Nickel oxide-based catalysts (NixOx) were synthesized and used for the in-situ upgrading process of heavy crude oil (viscosity 2157 mPa·s, and API gravity of 14.1° at 25 °C) in aquathermolysis conditions for viscosity re...

  • Article
  • Open Access
13 Citations
5,424 Views
18 Pages

14 May 2019

Hydrotreatment is an efficient method for pyrolytic oil upgrading; however, the trade-off between the operational cost on hydrogen consumption and process profit remains the major challenge for the process designs. In this study, an integrated proces...

  • Article
  • Open Access
11 Citations
10,634 Views
14 Pages

Upgrading the MBBR Process to Reduce Excess Sludge Production in Activated Sludge System Treating Sewage

  • Duaa Natheer Khudhair,
  • Majid Hosseinzadeh,
  • Haider M. Zwain,
  • Seyed Mostafa Siadatmousavi,
  • Ali Majdi and
  • Amin Mojiri

19 January 2023

Excess sludge production is one of the limitations of the biological activated sludge process. Therefore, the study’s objective is to upgrade the MBBR process to an integrated fixed film-activated sludge (IFAS) process to reduce excess sludge p...

  • Article
  • Open Access
7 Citations
5,607 Views
26 Pages

Model-Based Solution for Upgrading Nitrogen Removal for a Full-Scale Municipal Wastewater Treatment Plant with CASS Process

  • Mengmeng Liu,
  • Meixue Chen,
  • Rong Qi,
  • Dawei Yu,
  • Min Yang,
  • Jiaxi Zheng,
  • Yuansong Wei and
  • Haizhou Du

15 March 2021

Aiming at providing cost-effective approach for upgrading the existing municipal wastewater treatment plants in the cold region of China to meet more stringent discharge standards of nitrogen removal, a full-scale sewage treatment plant with the CASS...

  • Article
  • Open Access
26 Citations
8,286 Views
12 Pages

8 March 2016

The huge consumption of iron ores in China has attracted much attention to utilizing low grade complex iron resources, such as high-aluminum hematite-limonite ore, which is a refractory resource and difficult to upgrade by traditional physical concen...

  • Article
  • Open Access
1,524 Views
22 Pages

Process designs based on deterministic simulations without considering parameter uncertainty or variability have a high probability of failing to meet specifications. In this work, uncertainty and global sensitivity analyses were applied to a biogas...

  • Article
  • Open Access
5 Citations
3,550 Views
13 Pages

Mineralogical Characteristics of Baima Vanadium Titanomagnetite during Magnetic Separation Upgrading

  • Xiang Zhong,
  • Haoran Hu,
  • Shuo Li,
  • Jian Gao,
  • Zhixin Shi and
  • Fuxing Zhu

17 November 2023

The Baima vanadium titanomagnetite deposit, located in the Panzhihua-Xichang (Panxi) metallogenic belt in China, is one of the super-large deposits in the region. The titanomagnetite upgrading process involves grinding the raw ore followed by magneti...

  • Article
  • Open Access
25 Citations
3,472 Views
18 Pages

30 April 2022

In this paper, an innovative method is proposed to upgrade iron and remove phosphorus from high-phosphorus oolitic hematite ore by the sodium magnetization roasting–magnetic separation–sulfuric acid and sodium hydroxide leaching process....

  • Article
  • Open Access
899 Views
16 Pages

17 June 2025

To enhance the oxidative stability of aging diesel fuel stored in nuclear power emergency systems, we propose a novel hybrid optimization framework that integrates a Genetic Algorithm (GA), State-Space Network (SSN) modeling, and Computational Fluid...

  • Article
  • Open Access
4 Citations
2,040 Views
17 Pages

25 November 2023

The partial upgrading of “tar-like” Canadian bitumen is an essential process to reduce its viscosity to an acceptable range that meets the required pipeline specifications. An innovative and potentially greener solution has emerged in the...

  • Article
  • Open Access
38 Citations
4,633 Views
19 Pages

Direct Hydrogen Production from Extra-Heavy Crude Oil under Supercritical Water Conditions Using a Catalytic (Ni-Co/Al2O3) Upgrading Process

  • Richard Djimasbe,
  • Ildar R. Ilyasov,
  • Michael Kwofie,
  • Mohammed A. Khelkhal,
  • Dmitrii A. Emelianov,
  • Ameen A. Al-Muntaser,
  • Muneer A. Suwaid and
  • Mikhail A. Varfolomeev

6 October 2022

The generation of hydrogen from unconventional oil is expected to increase significantly during the next decade. It is commonly known that hydrogen is an environmentally friendly alternative fuel, and its production would partially cover the gap in e...

  • Article
  • Open Access
7 Citations
3,027 Views
23 Pages

16 January 2022

Software is a very important part to implement advanced information systems, such as AI and IoT based on the latest hardware equipment of the fourth Industrial Revolution. In particular, decision making for software upgrade is one of the essential pr...

  • Article
  • Open Access
1 Citations
1,266 Views
25 Pages

Dynamic Investigation of Thermochemical Heat Upgrade and Alternative Industrial Heating Technologies

  • Christos Sammoutos,
  • Angeliki Kitsopoulou,
  • Panagiotis Lykas,
  • Dimitra Gonidaki,
  • Evangelos Vidalis,
  • Dimitrios Korres,
  • Hamid Reza Rahbari,
  • Christos Tzivanidis and
  • Evangelos Bellos

12 April 2025

Industrial process heat production is critical to achieving sustainability in our society. Avoiding fossil fuels and reducing electricity consumption for heat production are critical aspects of creating sustainable industries. Exploiting waste heat s...

  • Article
  • Open Access
44 Citations
7,790 Views
18 Pages

Techno-Economic Assessment of Biological Biogas Upgrading Based on Danish Biogas Plants

  • Néméhie Lawson,
  • Merlin Alvarado-Morales,
  • Panagiotis Tsapekos and
  • Irini Angelidaki

8 December 2021

Biological biogas upgrading with H2 derived from excess renewable electricity was modeled and simulated in PROII® (AVEVA Group plc, Cambridge, UK). An economic analysis was performed for a biogas plant processing 100,000 tons of biomass (substrat...

  • Article
  • Open Access
43 Citations
5,719 Views
24 Pages

Sustainability of Biorefineries: Challenges and Perspectives

  • Juan Camilo Solarte-Toro and
  • Carlos Ariel Cardona Alzate

28 April 2023

Biorefineries have been defined as complex systems where biomass is integrally processed to obtain value-added products and energy vectors, involving recent research advances, technological trends, and sustainable practices. These facilities are evol...

  • Article
  • Open Access
4 Citations
2,213 Views
18 Pages

Zirconia Enrichment of Zircon from Arikya, Nasarawa State, Nigeria, by Magnetic and Gravity Separation Processes for Use as Reinforcing Agent in Composite Formulation

  • Benneth Ifenna Okoli,
  • Olufemi A. Agboola,
  • Azikiwe Peter Onwualu,
  • Abdulhakeem Bello,
  • Olusegun Samuel Sholiyi,
  • Vitalis C. Anye and
  • Olatunbosun T. Yusuf

17 January 2024

Acceptable zircon for composite formulation in the aerospace industry requires that the mineral contains a minimum of 65% zirconia (ZrO2). Despite having vast deposits of zircon, Nigeria’s aerospace industry has historically relied primarily on...

  • Communication
  • Open Access
19 Citations
4,119 Views
9 Pages

Thermal Upgrade of Enzymatically Synthesized Aliphatic and Aromatic Oligoesters

  • James W. Comerford,
  • Fergal P. Byrne,
  • Simone Weinberger,
  • Thomas J. Farmer,
  • Georg M. Guebitz,
  • Lucia Gardossi and
  • Alessandro Pellis

13 January 2020

The enzymatic synthesis of polyesters in solventless systems is an environmentally friendly and sustainable method for synthetizing bio-derived materials. Despite the greenness of the technique, in most cases only short oligoesters are obtained, with...

  • Article
  • Open Access
7 Citations
2,720 Views
17 Pages

Biomass to H2: Evaluation of the Impact of PV and TES Power Supply on the Performance of an Integrated Bio-Thermo-Chemical Upgrading Process for Wet Residual Biomass

  • Matteo Baldelli,
  • Lorenzo Bartolucci,
  • Stefano Cordiner,
  • Giorgio D’Andrea,
  • Emanuele De Maina and
  • Vincenzo Mulone

24 March 2023

The last Intergovernmental Panel on Climate Change (IPPC) assessment report highlighted how actions to reduce CO2 emissions have not been effective so far to achieve the 1.5 C limit and that radical measures are required. Solutions such as the upgrad...

  • Article
  • Open Access
17 Citations
3,168 Views
19 Pages

With the increasingly serious environmental problems, coordinating the relationship between the environment and economic development has become a crucial task for developing countries, especially China. This paper studies the role of eco-industrial p...

  • Article
  • Open Access
61 Citations
12,846 Views
16 Pages

Process Integration of Green Hydrogen: Decarbonization of Chemical Industries

  • Mohammad Ostadi,
  • Kristofer Gunnar Paso,
  • Sandra Rodriguez-Fabia,
  • Lars Erik Øi,
  • Flavio Manenti and
  • Magne Hillestad

17 September 2020

Integrated water electrolysis is a core principle of new process configurations for decarbonized heavy industries. Water electrolysis generates H2 and O2 and involves an exchange of thermal energy. In this manuscript, we investigate specific traditio...

  • Review
  • Open Access
286 Citations
21,197 Views
35 Pages

Continuous Hydrothermal Liquefaction of Biomass: A Critical Review

  • Daniele Castello,
  • Thomas Helmer Pedersen and
  • Lasse Aistrup Rosendahl

15 November 2018

Hydrothermal liquefaction (HTL) of biomass is emerging as an effective technology to efficiently valorize different types of (wet) biomass feedstocks, ranging from lignocellulosics to algae and organic wastes. Significant research into HTL has been c...

  • Article
  • Open Access
40 Citations
4,682 Views
23 Pages

Does Environmental Regulation Affect Export Quality? Theory and Evidence from China

  • Jing Xie,
  • Qi Sun,
  • Shaohong Wang,
  • Xiaoping Li and
  • Fei Fan

Most studies focus on the empirical investigation of the relationship between environment and trade, but they lack a systematic theoretical framework. To fill this gap, this study constructs an analytical framework of export competitiveness from the...

  • Feature Paper
  • Article
  • Open Access
6 Citations
2,764 Views
22 Pages

A Theoretical and Experimental Approach to the Analysis of Hydrogen Generation and Thermodynamic Behavior in an In Situ Heavy Oil Upgrading Process Using Oil-Based Nanofluids

  • Oscar E. Medina,
  • Santiago Céspedes,
  • Richard D. Zabala,
  • Carlos A. Franco,
  • Agustín F. Pérez-Cadenas,
  • Francisco Carrasco-Marín,
  • Sergio H. Lopera,
  • Farid B. Cortés and
  • Camilo A. Franco

2 November 2022

This study aims to show a theoretical and experimental approach to the analysis of hydrogen generation and its thermodynamic behavior in an in situ upgrading process of heavy crude oil using nanotechnology. Two nanoparticles of different chemical nat...

  • Communication
  • Open Access
11 Citations
3,441 Views
8 Pages

Effect of pH Change on the Microalgae-Based Biogas Upgrading Process

  • Leslie Meier,
  • Carlos Vilchez,
  • María Cuaresma,
  • Álvaro Torres-Aravena and
  • David Jeison

29 November 2022

An alternative way to remove CO2 from biogas is the use of photosynthetic microorganisms, such as microalgae. This can be achieved by the operation of an open photobioreactor, connected with a mass transfer column, such as a counterflow column. This...

  • Review
  • Open Access
45 Citations
16,563 Views
20 Pages

Fisher–Tropsch Synthesis for Conversion of Methane into Liquid Hydrocarbons through Gas-to-Liquids (GTL) Process: A Review

  • Farah T. Alsudani,
  • Abdullah N. Saeed,
  • Nisreen S. Ali,
  • Hasan Sh. Majdi,
  • Hussein G. Salih,
  • Talib M. Albayati,
  • Noori M. Cata Saady and
  • Zaidoon M. Shakor

4 January 2023

The interest in Gas-to-Liquid technology (GTL) is growing worldwide because it involves a two-step indirect conversion of natural gas to higher hydrocarbons ranging from Liquefied Petroleum Gas (LPG) to paraffin wax. GTL makes it possible to obtain c...

  • Article
  • Open Access
3 Citations
3,258 Views
15 Pages

18 November 2021

This paper aims at assessing the impact of retrofitting an existing, 730 MWe, coal-fired power plant into a biomass-fired combined heat and power (CHP) plant on its energetic and exergetic performances. A comprehensive thermodynamic model of the powe...

  • Article
  • Open Access
14 Citations
4,941 Views
18 Pages

Living Labs in Social Housing Upgrades: Process, Challenges and Recommendations

  • Marcelle Engler Bridi,
  • Joao Soliman-Junior,
  • Ariovaldo Denis Granja,
  • Patricia Tzortzopoulos,
  • Vanessa Gomes and
  • Doris Catharine Cornelie Knatz Kowaltowski

23 February 2022

Social housing (SH) upgrades involve multiple stakeholders with sometimes divergent requirements and needs. Collaboration and participative processes are essential to ensuring an appropriate value for users is delivered through social housing upgrade...

  • Article
  • Open Access
1 Citations
2,221 Views
12 Pages

(Up)Grading: A (Re)Humanizing Assessment Process with a Focus on Feedback

  • Stefanie D. Livers,
  • Kristin E. Harbour and
  • Patrick L. Sullivan

Researchers across two universities and three different mathematics education courses implemented their vision of a novel grading approach called (Up)grading. (Up)grading shifts the focus of assessment from grades to growth. Key features of implement...

  • Article
  • Open Access
2 Citations
3,046 Views
13 Pages

Design of Remote Upgrade System for Data Processing Unit in Marine Engine Room Simulator

  • Hong Zeng,
  • Hui Liu,
  • Jundong Zhang,
  • Minglu Sun and
  • Tianjian Wang

10 September 2022

With the development of ship intelligence, the frequency of upgrading the marine engine room simulator, which is essential for crew training, has increased. Traditionally, the data processing unit (DPU) of the marine engine room simulator is upgraded...

  • Article
  • Open Access
28 Citations
4,029 Views
21 Pages

Improvement of Steam Injection Processes Through Nanotechnology: An Approach through in Situ Upgrading and Foam Injection

  • Oscar E. Medina,
  • Yira Hurtado,
  • Cristina Caro-Velez,
  • Farid B. Cortés,
  • Masoud Riazi,
  • Sergio H. Lopera and
  • Camilo A. Franco

6 December 2019

This study aims to evaluate a high-performance nanocatalyst for upgrading of extra-heavy crude oil recovery and at the same time evaluate the capacity of foams generated with a nanofluid to improve the sweeping efficiency through a continuous steam i...

  • Review
  • Open Access
2 Citations
4,462 Views
24 Pages

Cryogenic upgrading represents a promising route for the production of high-purity biomethane, aligning with current decarbonization goals and the increasing demand for renewable gases. This review provides a critical assessment of cryogenic technolo...

  • Review
  • Open Access
26 Citations
8,717 Views
39 Pages

Catalytic Oxidation Processes for the Upgrading of Terpenes: State-of-the-Art and Future Trends

  • Audrey Denicourt-Nowicki,
  • Mariem Rauchdi,
  • Mustapha Ait Ali and
  • Alain Roucoux

27 October 2019

Terpenic olefins constitute a relevant platform of renewable molecules, which could be used as key intermediates for the perfumery, flavoring, and pharmaceutical industries. The upgrading of these cheap and available agro-resources through catalytic...

  • Review
  • Open Access
16 Citations
7,668 Views
29 Pages

13 June 2024

The purpose of this research is to investigate a variety of approaches to the conversion of biomass, with a particular emphasis on employing anaerobic digestion and biogas upgrading systems. An analysis of the existing technologies is performed, with...

  • Review
  • Open Access
2 Citations
3,345 Views
18 Pages

Advances in computer technology and image processing now allow us to obtain from angiographic images a large variety of information on coronary physiology without the use of a guide-wire as a diagnostic information equivalent to FFR and iFR but also...

  • Article
  • Open Access
67 Citations
8,939 Views
19 Pages

Microwave Hydrothermal Carbonization of Rice Straw: Optimization of Process Parameters and Upgrading of Chemical, Fuel, Structural and Thermal Properties

  • Sabzoi Nizamuddin,
  • Sundus Saeed Qureshi,
  • Humair Ahmed Baloch,
  • Muhammad Tahir Hussain Siddiqui,
  • Pooja Takkalkar,
  • Nabisab Mujawar Mubarak,
  • Deepa K. Dumbre,
  • Gregory J. Griffin,
  • Srinivasan Madapusi and
  • Akshat Tanksale

28 January 2019

The process parameters of microwave-induced hydrothermal carbonization (MIHTC) play an important role on the hydrothermal chars (hydrochar) yield. The effect of reaction temperature, reaction time, particle size and biomass to water ratio was optimiz...

  • Review
  • Open Access
1 Citations
1,816 Views
29 Pages

14 November 2025

With the rapid increase in solid waste generated worldwide, sustainable approaches for the recovery of resources considering environmental protection are required. As one of the emerging strategies in recent years, biochar has shown great potential d...

  • Feature Paper
  • Article
  • Open Access
42 Citations
5,476 Views
16 Pages

Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

  • Antonella Satira,
  • Emilia Paone,
  • Viviana Bressi,
  • Daniela Iannazzo,
  • Federica Marra,
  • Paolo Salvatore Calabrò,
  • Francesco Mauriello and
  • Claudia Espro

19 November 2021

In this study, a simple and green protocol to obtain hydrochar and high-added value products, mainly 5-hydroxymethylfurfural (5-HMF), furfural (FU), levulinic acid (LA) and alkyl levulinates, by using the hydrothermal carbonization (HTC) of orange pe...

  • Article
  • Open Access
10 Citations
7,339 Views
22 Pages

27 March 2023

The use of the commercial simulator Aspen Plus® could bring an amelioration in the accuracy of the predictions of the chemical species composition in the output streams of the anaerobic digestion process. Compared to the traditionally employed lu...

  • Article
  • Open Access
54 Citations
7,001 Views
14 Pages

29 March 2018

This work aims to investigate the effect of active catalytic nanoparticles on the improvement of the efficiency in recovery of a continuous steam injection process. Catalytic nanoparticles were selected through batch-adsorption experiments and the su...

  • Article
  • Open Access
519 Views
24 Pages

Mesophilic Trickle-Bed Reactors for Enhanced Ex Situ Biogas Upgrading at Short Gas Retention Times: Process Performance and Microbial Insights

  • Christina Karyofyllidou,
  • Apostolos Spyridonidis,
  • Vasileios Diamantis,
  • Ioannis Galiatsatos,
  • George Tsiamis,
  • Panagiota Stathopoulou,
  • Ioannis Kosmadakis,
  • Alexandros Eftaxias and
  • Katerina Stamatelatou

Biological upgrading of biogas to biomethane is a promising power-to-gas technology with a low environmental footprint. However, due to the lower conversion rates, long-term investigations on mesophilic trickle-bed reactors (TBRs) remain scarce. This...

  • Article
  • Open Access
8 Citations
5,416 Views
14 Pages

27 September 2023

The current challenges of commercial cyclic adsorption processes for biogas upgrading are associated with either high energy consumption or low recovery. To address these challenges, this work evaluates the performance of a range of configurations fo...

  • Article
  • Open Access
38 Citations
8,208 Views
22 Pages

27 May 2015

This study illustrates the optimisation of the experimental conditions of three sequential steps for chondroitin sulphate (CS) recovery from three cartilaginous materials of Scyliorhinus canicula by-products. Optimum conditions of temperature and pH...

  • Review
  • Open Access
236 Citations
28,015 Views
28 Pages

Chondroitin Sulfate, Hyaluronic Acid and Chitin/Chitosan Production Using Marine Waste Sources: Characteristics, Applications and Eco-Friendly Processes: A Review

  • José Antonio Vázquez,
  • Isabel Rodríguez-Amado,
  • María Ignacia Montemayor,
  • Javier Fraguas,
  • María Del Pilar González and
  • Miguel Anxo Murado

11 March 2013

In the last decade, an increasing number of glycosaminoglycans (GAGs), chitin and chitosan applications have been reported. Their commercial demands have been extended to different markets, such as cosmetics, medicine, biotechnology, food and textile...

  • Feature Paper
  • Review
  • Open Access
20 Citations
7,928 Views
25 Pages

23 October 2023

Ethanol, a versatile chemical extensively employed in several fields, including fuel production, food and beverage, pharmaceutical and healthcare industries, and chemical manufacturing, continues to witness expanding applications. Consequently, there...

  • Article
  • Open Access
13 Citations
2,603 Views
13 Pages

The Carbon Emission Trading Policy of China: Does It Really Boost the Environmental Upgrading?

  • Rabia Shahid,
  • Shijie Li,
  • Jian Gao,
  • Muhammad Ahsan Altaf,
  • Atif Jahanger and
  • Awais Shakoor

21 August 2022

China’s rapid industrialization has led to massive resource consumption, and the country has recently been highlighted as the World’s top carbon emitter. To pursue a sustainable economy via environmental upgrading, reductions in carbon em...

  • Article
  • Open Access
33 Citations
8,260 Views
15 Pages

Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

  • Melanie Hellinger,
  • Sina Baier,
  • Peter Mølgaard Mortensen,
  • Wolfgang Kleist,
  • Anker Degn Jensen and
  • Jan-Dierk Grunwaldt

3 July 2015

Hydrodeoxygenation of guaiacol in the presence of 1-octanol was studied in a fixed-bed reactor under mild conditions (50–250 °C) over platinum particles supported on silica (Pt/SiO2) and a zeolite with framework type MFI at a Si/Al-ratio of 45 (Pt/...

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