Author
Erkan Topal
Other affiliations: Dicle University, Curtin University, University of Queensland ...read more
Bio: Erkan Topal is an academic researcher from Colorado School of Mines. The author has contributed to research in topics: Open-pit mining & Integer programming. The author has an hindex of 25, co-authored 93 publications receiving 3290 citations. Previous affiliations of Erkan Topal include Dicle University & Curtin University.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors presented a new formula for calculating when fossil fuel reserves are likely to be depleted and developed an econometrics model to demonstrate the relationship between fossil fuel reserve and some main variables.
1,744 citations
TL;DR: In this article, a modified econometric version of the long-term trend reverting jump and dip diffusion model for forecasting natural resource commodity prices is proposed, which addresses the deficiencies of previous models, such as jumps and dips as parameters and unit root test for longterm trends.
260 citations
TL;DR: In this paper, a long-term trend of worldwide fossil fuel prices in the future by introducing a new method to forecast oil, natural gas and coal prices is reviewed. But the model is not suitable for the case of coal prices.
124 citations
TL;DR: In this article, the main variables affecting consumption trends are: world reserves, the price of fossil fuels, US production and US net imports, all of which have been analyzed individually for more than half a century.
102 citations
TL;DR: A new approach based on mixed integer programming (MIP) techniques is used for annually scheduling a fixed fleet of mining trucks in a given operation, over a multi-year time horizon to minimize maintenance cost.
90 citations
Cited by
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TL;DR: Kenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Long
Abstract: Kenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Long
5,389 citations
TL;DR: In this article, the authors presented a new formula for calculating when fossil fuel reserves are likely to be depleted and developed an econometrics model to demonstrate the relationship between fossil fuel reserve and some main variables.
1,744 citations
1,571 citations
01 Jan 1994
TL;DR: In this Chapter, a decision maker (or a group of experts) trying to establish or examine fair procedures to combine opinions about alternatives related to different points of view is imagined.
Abstract: In this Chapter, we imagine a decision maker (or a group of experts) trying to establish or examine fair procedures to combine opinions about alternatives related to different points of view.
1,329 citations
TL;DR: This critical review provides insights into the state-of-the-art accomplishments in the chemocatalytic technologies to generate fuels and value-added chemicals from lignocellulosic biomass, with an emphasis on its major component, cellulose.
Abstract: Lignocellulosic biomass is the most abundant and bio-renewable resource with great potential for sustainable production of chemicals and fuels. This critical review provides insights into the state-of the-art accomplishments in the chemocatalytic technologies to generate fuels and value-added chemicals from lignocellulosic biomass, with an emphasis on its major component, cellulose. Catalytic hydrolysis, solvolysis, liquefaction, pyrolysis, gasification, hydrogenolysis and hydrogenation are the major processes presently studied. Regarding catalytic hydrolysis, the acid catalysts cover inorganic or organic acids and various solid acids such as sulfonated carbon, zeolites, heteropolyacids and oxides. Liquefaction and fast pyrolysis of cellulose are primarily conducted over catalysts with proper acidity/basicity. Gasification is typically conducted over supported noble metal catalysts. Reaction conditions, solvents and catalysts are the prime factors that affect the yield and composition of the target products. Most of processes yield a complex mixture, leading to problematic upgrading and separation. An emerging technique is to integrate hydrolysis, liquefaction or pyrolysis with hydrogenation over multifunctional solid catalysts to convert lignocellulosic biomass to value-added fine chemicals and bio-hydrocarbon fuels. And the promising catalysts might be supported transition metal catalysts and zeolite-related materials. There still exist technological barriers that need to be overcome (229 references).
1,123 citations