Search results

1 – 10 of 15
Article
Publication date: 5 April 2013

Martin Svanberg and Árni Halldórsson

One way of overcoming logistics barriers (poor transportation, handling and storage properties) towards increased utilisation of biomass is to introduce a pre‐treatment…

Abstract

Purpose

One way of overcoming logistics barriers (poor transportation, handling and storage properties) towards increased utilisation of biomass is to introduce a pre‐treatment process such as torrefaction early in the biomass‐to‐energy supply chain. Torrefaction offers a range of potentially beneficial logistics properties but the actual benefits depend upon how the supply chain is configured to address various elements of customer demand. Hence, the aim of this paper is to develop a framework for torrefaction configuration in a supply chain perspective for different types of customers.

Design/methodology/approach

Sophisticated pre‐treatment processes are yet to reach the commercialisation phase. Identification of possible supply chain configurations is in this paper done through a conceptual approach by bringing together knowledge from related research fields such as unrefined forest fuel, pellets and coal logistics with prescriptions for configuration derived from the subject area of supply chain management (SCM).

Findings

A framework that explicates different elements of supply and demand of torrefaction is proposed, and exemplified by three distinct supply chains. Depending on demand, torrefaction serves different purposes, bridging gaps in place, time, quality and ownership. Furthermore, different supply chain configurations will pose different requirements on torrefaction in terms of producing different product quality, durability, energy density and hydrophobicity of the pellets.

Research limitations/implications

The proposed framework entails a set of propositions, but requires further development through empirical studies using complementary research methods such as interviews or surveys and quantification through techno‐economical or optimisation from a supply chain perspective.

Practical implications

This paper provides a framework that can inform decisions makers in biomass‐to‐energy supply chains, in particular at torrefaction plants, on upstream and downstream implications of their decisions.

Originality/value

The findings have implications for biomass‐to‐energy supply chains in general, and in particular, the paper provides a supply chain perspective of pre‐treatment processes, where previous research has focused primarily on technical aspects of torrefaction.

Details

International Journal of Energy Sector Management, vol. 7 no. 1
Type: Research Article
ISSN: 1750-6220

Keywords

Content available
Article
Publication date: 5 April 2013

Prasanta Kumar Dey

103

Abstract

Details

International Journal of Energy Sector Management, vol. 7 no. 1
Type: Research Article
ISSN: 1750-6220

Article
Publication date: 28 December 2021

Ramin Azargohar, Ajay Dalai, Ebrahim Hassanpour and Saeed Moshiri

Lignite coal-fired power plants are the main electricity generators in the province of Saskatchewan, Canada. Although burning lignite coal to generate power is economical…

Abstract

Purpose

Lignite coal-fired power plants are the main electricity generators in the province of Saskatchewan, Canada. Although burning lignite coal to generate power is economical, it produces significant greenhouse gases making it a big challenge to Canada’s international commitment on emission reduction. However, abundant agricultural crops and sawdust produced in Saskatchewan put the province in a good position to produce and use agri-pellets as an alternative fuel to generate electricity. This study aims to conduct an economic and environmental analysis of the replacement of lignite coal by agri-pellets as the fuel for Saskatchewan’s coal-fired power plants.

Design/methodology/approach

The study estimates the economic and environmental costs and benefits of two alternative fuels for power plants. The economic analysis is based on the pellet production and transportation costs from farms to production sites and from the production sites to power plants. In the production process, biomass precursors are densified with and without additives to produce fuel agri-pellets with appropriate mechanical durability and high heating value per volume unit. The environmental analysis involves estimation of greenhouse gas emissions and their social costs for lignite coal and different types of agri-pellets under different scenarios for pellet production and transportation.

Findings

The results show that although the total cost of electricity is lower for coal than agri-pellets, the gap shrinks when social costs and specifically a carbon price of $50/tonne are included in the model. The cost of electricity in lignite coal-fired power plants would also be on par with agri-pellets-fired power plants if the carbon price is between U$68 and $78 per tonne depending on the power plant locations. Therefore, a transition from coal to agri-pellet fuels is feasible if a high-enough price is assigned to carbon. The method and the results can be generalized to other places with similar conditions.

Research limitations/implications

There are a few caveats in this study as follows. First, the fixed costs associated with the transformation of the existing coal-fired power plants to pellet-fired plants are not considered. Second, the technological progress in the transportation sector, which would favor the net benefits of using pellets versus coal, is not included in the analysis. Finally, the study does not address the possible political challenges facing the transition in the context of the Canadian federal system.

Practical implications

The study results indicate that the current carbon price of $50 per tonne is not sufficient to make the agri-pellets a feasible source of alternative energy in Saskatchewan. However, if carbon pricing continues to rise by $15 annually starting in 2022, as announced, a transition from coal to agri-pellets will be economically feasible.

Social implications

Canada is committed to reduce its emission according to the Paris agreement, and therefore, needs to have a concrete policy to find alternative energy sources for its coal-fired power plants. This study examines the challenges and benefits of such transition using the existing agri-pellet resources in Saskatchewan, a province with abundant agricultural residues and coal-fired power plants. The findings indicate that a significant emission reduction can be achieved by using agri-pellets instead of coal to produce electricity. The study also implies that the transition to renewable energy is economical when social costs of carbon (carbon tax) is included in the analysis.

Originality/value

As far as the authors know, this is the first study providing a socio-economic analysis for a possible transition from the coal-fired power plants to a more clean and sustainable renewable energy source in one of the highest carbon dioxide (CO2) producer provinces in Canada: Saskatchewan. The study builds upon the technical production of three agri-pellets (oat hull, canola hull and sawdust) and estimates the economic and environmental costs of alternative fuels under different scenarios.

Details

International Journal of Energy Sector Management, vol. 16 no. 5
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 7 December 2015

Annie F.A. Chimphango and Johann F. Görgens

Agricultural food residues (agro-residues) receive low economic returns and experience disposal problems. The food production and processing is often not configured to…

Abstract

Purpose

Agricultural food residues (agro-residues) receive low economic returns and experience disposal problems. The food production and processing is often not configured to supply agro-residues for production of bioenergy needed in food processing. The feasibility of utilising agro-residues through advances in postharvest technology for sustainable bioenergy conversion is reviewed. The paper aims to discuss this issue.

Design/methodology/approach

Agro-residues from maize, sugarcane and potatoes in five African countries were assessed from secondary data to identify suitable conversion technologies, energy products and configurations of bioenergy plants for applications in postharvest food processing.

Findings

Strategic alignment of postharvest technology to bioenergy production systems is vital to advancing both food production and bioenergy that benefit rural communities in Africa. High economic returns are possible when the bioenergy plants are either annexure to existing agro-processing operations or operate as a biorefinery.

Research limitations/implications

Assessment of energy self-sufficiency of food production and processing systems is required.

Practical implications

Agro-residues for bioenergy production require investments in infrastructure for storage, transportation and processing of the residues, and development of new risk management techniques.

Social implications

The rural communities will be energy secure resulting in food security through reduced postharvest losses and increased agricultural productivity.

Originality/value

The study stimulates innovative thinking in establishing sustainable bioenergy systems for food processes.

Details

British Food Journal, vol. 117 no. 12
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 28 June 2022

Tafarel Carvalho Gois, Karim Marini Thomé and Jeremiás Máté Balogh

This study aims to analyse the structure and the competitiveness of the international coffee market.

Abstract

Purpose

This study aims to analyse the structure and the competitiveness of the international coffee market.

Design/methodology/approach

To describe the international market structure, this study uses Herfindahl–Hirschman index, net export index (NEI), and to measure export competitiveness revealed symmetric comparative advantage (RSCA). Finally, survival function analyses were developed using the Kaplan–Meier product-limit estimator to characterize the stability and duration of the competitiveness in the international coffee market.

Findings

The results reveal that the imports and exports market structure are unconcentrated. NEI shows that several countries are stable in their commercial characteristics (imports, exports and re-exports), nevertheless, NEI also revealed countries transitioning through the commercial characteristics, that the international coffee market structure presents dynamic commercial characteristics. The result for (RSCA shows that Uganda, Ethiopia, Honduras, Brazil, Colombia, Guatemala and Indonesia had the highest values and also resulted in better survival rates along with Italy, India, Mexico and Switzerland. The stability of RSCA indices is investigated by regression analysis, showing a tendency to increase expertise in coffee exports from 2015.

Originality/value

This study provides a comprehensive and recent analysis of the international coffee market structure and competitiveness, contributing to the analysis of the international market of the product.

Details

Competitiveness Review: An International Business Journal , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1059-5422

Keywords

Article
Publication date: 15 June 2010

J.F. Dallemand, G. De Santi, A. Leip, D. Baxter, N. Rettenmaier and H. Ossenbrink

The objective of this paper is to discuss some scientific challenges related to the production and use of biomass for transport, heat and electricity.

1986

Abstract

Purpose

The objective of this paper is to discuss some scientific challenges related to the production and use of biomass for transport, heat and electricity.

Design/methodology/approach

Specific attention is paid to the environmental assessment of liquid bio‐fuels for transport and to the discussion of causes of uncertainties in the assessment. Three main topics are taken as examples, in order to illustrate the complexity of environmental assessment of bio‐fuels and the difficulty in reducing uncertainties: agro‐environmental impact of bio‐ethanol (from sugar cane) in Brazil and bio‐diesel (from palm oil) in Malaysia. These two tropical countries were selected because of their role as leaders at world level and their strong export potential to the European Union), N2O (Nitrous Oxide) emissions related to crop cultivation for bio‐fuels and land use change; and GHG emissions and Life Cycle Assessment (LCA) of bio‐diesel from palm oil in Malaysia. These three topics are discussed and complemented by considerations about biomass conversion issues.

Findings

The quantification of the degree of the sustainability of the production and use of bio‐fuels for transport is to a large extent related to the choice of farming practices during the feedstock production and their corresponding environmental impact.

Practical implications

Recommendations are formulated so as to reduce scientific uncertainty, for example through the development of internationally‐agreed sustainability certification systems with corresponding verification measures, or further research on emissions and indirect land‐use change.

Originality/value

The value of the paper on bio‐energy research challenges is related to the combined analysis of European and tropical constraints in the field of biomass.

Details

Management of Environmental Quality: An International Journal, vol. 21 no. 4
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 15 November 2022

Roberto Leonardo Rana, Christian Bux and Mariarosaria Lombardi

The research provides a systematic literature review on the environmental sustainability of the globe artichoke [Cynara cardunculus L. var. scolymus (L.) Fiori], in the…

Abstract

Purpose

The research provides a systematic literature review on the environmental sustainability of the globe artichoke [Cynara cardunculus L. var. scolymus (L.) Fiori], in the cultivated cardoon [Cynara cardunculus L. var. altilis DC.] and in the wild cardoon [Cynara cardunculus L. var. sylvestris (Lamk)] supply chains, to fill in the literature data gaps and to identify new research directions.

Design/methodology/approach

In the light of the PRISMA standard guidelines, the research provides a systematic literature review according to six research strings on Scopus and Web of Science. 45 scientific articles have been selected out of 407 contributions. Data have been synthesized according to a co-word analysis through the VOSviewer software, to provide insights into the structure of the research network, to offer a multidimensional scaling and clustering into research groups and to discuss the results.

Findings

The research identifies five main research trends: (1) biomass-to-bioenergy or biomass-to-biocomposite materials; (2) waste-to-bioenergy or waste-to-bioproducts; (3) crop management to increase yield productivity; (4) environmental impacts assessment; (5) irrigation water management. Besides, the research highlights momentous challenges and adopted strategies to tackle climate change and to reduce natural resources consumption, as well as the nexus between circular economy and environmental impact assessment.

Originality/value

The novelty of this study relies on the fact that it analyses the environmental sustainability of the Cynara cardunculus L. spp. Supply chain in a systematic way, giving the opportunity to identify future research directions regarding the environmental impacts associated with agricultural production and industrial transformation.

Details

British Food Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 6 June 2016

Jan Stentoft, Ram Narasimhan and Thomas Poulsen

To support ongoing industry efforts to reduce the cost of energy (CoE) of offshore wind compared to other types of energy sources, researchers are applying scientific…

1852

Abstract

Purpose

To support ongoing industry efforts to reduce the cost of energy (CoE) of offshore wind compared to other types of energy sources, researchers are applying scientific models and thought processes to identify potential areas of improvement and optimization. This paper aims to introduce a conceptual framework from a supply chain management (SCM) perspective, aimed at promoting the reduction of CoE in the offshore wind energy industry.

Design/methodology/approach

Using conceptual arguments from current academic literature in SCM, a comprehensive framework is presented that clarifies how SCM practices can be used by offshore wind energy industry to reduce CoE.

Findings

The offshore wind energy sector is a young industry that must reduce CoE to compete with other forms of energy. Applying a supply chain perspective in the offshore wind industry has hitherto been limited to the academic community. This paper offers a SCM framework that includes three interdependent aspects of reducing CoE – innovation, industrialization and supplier partnering – to guide the industry towards sources to reduce CoE.

Research limitations/implications

SCM is a broad research area; thus, the presented framework to reduce the CoE is open for further development.

Practical implications

The paper provides insights into how the CoE can be reduced through innovation, industrialization and partnering in the offshore wind energy supply chain.

Originality/value

The paper offers a seminal contribution by introducing a SCM framework to understand sources and approaches to reduce CoE in the offshore wind energy industry.

Details

International Journal of Energy Sector Management, vol. 10 no. 2
Type: Research Article
ISSN: 1750-6220

Keywords

Article
Publication date: 5 November 2019

Salman Ahmad, Muhammad Ijaz Khan, Tasawar Hayat, Muhammad Waqas and Ahmed Alsaedi

The purpose of this paper is to study entropy generation in magneto-Jeffrey nanomaterial flow by impermeable moving boundary. Adopted nanomaterial model accounts Brownian…

Abstract

Purpose

The purpose of this paper is to study entropy generation in magneto-Jeffrey nanomaterial flow by impermeable moving boundary. Adopted nanomaterial model accounts Brownian and thermophoretic diffusions. Modeling is arranged for thermal radiation, nonlinear convection and viscous dissipation. In addition, the concept of Arrhenius activation energy associated with chemical reaction are introduced for description of mass transportation.

Design/methodology/approach

Homotopy algorithms are used to compute the system of ordinary differential equations.

Findings

The afore-stated analysis clearly notes that simultaneous aspects of activation energy and entropy generation are not yet investigated. Therefore, the intention here is to consider such effects to formulate and investigate the magneto-Jeffrey nanoliquid flow by impermeable moving surface.

Originality/value

As per the authors’ knowledge, no such work has yet been published in the literature.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 12
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 11 September 2017

Jhonatas Antonelli, Cleber Antonio Lindino, Reinaldo Aparecido Bariccatti, Samuel Nelson Melegari Souza and Anderson Miguel Lenz

The purpose of this paper is to investigate the use of Pinus wood waste in lead adsorption as a remediation technique in aqueous medium and its subsequent use in obtaining…

Abstract

Purpose

The purpose of this paper is to investigate the use of Pinus wood waste in lead adsorption as a remediation technique in aqueous medium and its subsequent use in obtaining synthesis gas.

Design/methodology/approach

The capacity of the timber in the lead adsorption was studied in aqueous medium at various pH, determining the amount adsorbed in equilibrium. Then, the same timber was added in a fixed bed, co-current flow of two stage gasifier type, working temperature of 900°C, for obtaining synthesis gas. The synthesis gas composition was evaluated by the spectrophotometry in the infrared region and the gas chromatography and lead content in the ash and gas was determined by the atomic absorption spectrophotometry.

Findings

In laboratory tests carried out, the optimal pH for lead removal was pH 4 with 96.15 percent removal rate, reaching equilibrium after 180 min. In pilot scale the lead removal after 72 hours was 96 percent. The average production of syngas was 11.09 m³h−1. For tests with the motor-generator, the best condition occurred with charge of 2.0 kW, wherein gas consumption per kW produced reached 4.86 m³ kW−1, resulting in a 14.81 percent efficiency rate. The gas analysis showed an average concentration of 14.85 percent H2, 30.1 percent CO2, and 50.49 percent of atmospheric air. The concentration of lead in the gas was below the limit established by law. Pinus elliottii waste proved to be an excellent adsorbent, with removing more than 96 percent of the Pb ion present in aqueous solution and a starting material in the gasifier to generate synthesis gas.

Research limitations/implications

This paper describes the waste wood application in the treatment of contaminated environments and for obtaining syngas providing a sustainable process.

Originality/value

This paper shows a process that combines the remediation of contaminated environmental with power generation systems, allowing efficient management of contaminated environments.

Details

Management of Environmental Quality: An International Journal, vol. 28 no. 6
Type: Research Article
ISSN: 1477-7835

Keywords

1 – 10 of 15