Author
Henrik Topsøe
Bio: Henrik Topsøe is an academic researcher. The author has contributed to research in topics: Hydrodesulfurization. The author has an hindex of 1, co-authored 1 publications receiving 272 citations.
Topics: Hydrodesulfurization
Papers
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TL;DR: In this article, it was shown that 4-methyldibenzothiophene and 4,6-dimethyltibenzethiophene are the most appropriate compounds for investigations of candidate catalysts and reaction mechanisms for deep desulfurization.
284 citations
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TL;DR: In this article, the authors discuss the problems of sulfur reduction in highway and non-road fuels and present an overview of new approaches and emerging technologies for ultra-deep desulfurization of refinery streams for ultra clean (ultra-low-sulfur) gasoline, diesel fuels and jet fuels.
1,874 citations
TL;DR: In this article, the applicability and perspectives of various desulfurization technologies are evaluated taking into account the requirements of the produced fuels, and the progress achieved during recent years in catalysis-based HDS technologies (synthesis of improved catalysts, advanced reactor design, combination of distillation and HDS) and in non-HDS processes of sulfur removal (alkylation, extraction, precipitation, oxidation, and adsorption) is illustrated through a number of examples.
1,531 citations
TL;DR: In this article, the authors discuss the needs for fundamental changes in the energy system for major efficiency improvements in terms of global resource limitation and sustainable development, and discuss the strategies and options of fuel processors depend on the type of fuel cells and applications.
1,106 citations
TL;DR: In this paper, the authors discuss the recent advancement on ultra low sulfur diesel (ULSD) production from both scientific and applied point of view, highlighting the importance of catalyst selection and hydrogen consumption issues.
1,074 citations
TL;DR: In this paper, a selective review on design approaches and associated catalysis and chemistry for deep desulfurization and deep dearomatization (hydrogenation) of hydrocarbon fuels, particularly diesel fuels, is presented.
Abstract: This paper is a selective review on design approaches and associated catalysis and chemistry for deep desulfurization and deep dearomatization (hydrogenation) of hydrocarbon fuels, particularly diesel fuels. The challenge for deep desulfurization of diesel fuels is the difficulty of removing the refractory sulfur compounds, particularly 4,6-dimethyldibenzothiophene, with conventional hydrodesulfurization processes. The problem is exacerbated by the inhibiting effect of polyaromatics and nitrogen compounds, which exist in some diesel blend stocks on deep HDS. With the new Environmental Protection Agency (EPA) Tier II regulations to cut the diesel sulfur from current 500 ppmw down to 15 ppmw by June 2006, refineries are facing major challenges to meet the fuel sulfur specification along with the required reduction of aromatics contents. The principles and problems for the existing hydrodesulfurization processes, and the concepts, advantages and disadvantages of various new approaches will be discussed. Specifically, the following new design approaches for sulfur removal will be discussed: (1) novel catalysts for ultra-deep hydrodesulfurization under conventional HDS process conditions; (2) new design concept for sulfur-tolerant noble metal catalysts for low-temperature hydrogenation; (3) new desulfurization process by sulfur adsorption and capture under H2; (4) new desulfurization process by selective adsorption at ambient temperature without H2 and a related integrated process concept; (5) oxidative desulfurization in liquid-phase; and (6) biodesulfurization.
1,045 citations