Similar Search Results

Absence of diffusion through fractal interface

Maksimenko, V.V.; Andreev, G.B. - In: Physica A: Statistical Mechanics and its Applications 300 (2001) 3, pp. 339-349

The diffusion of molecules through the fractal interface between two “transparent” media is considered. Such a surface … possesses unique properties—its volume has a finite value. It is shown that the effective diffusion coefficient is equal to zero …

Persistent link: https://www.econbiz.de/10011061682

A PRACTICAL APPROACH FOR SENSING SURFACE NANOSTRUCTURES IN ELECTROCHEMICAL EXPERIMENTS

EFTEKHARI, ALI; KAZEMZAD, MAHMOOD; KEYANPOUR-RAD, MANSOOR - In: Surface Review and Letters (SRL) 13 (2006) 05, pp. 703-710

Fractal analysis of electrode surfaces by means of electrochemical techniques is an efficient tool to reveal surface … structures via a geometrical model. Since this is based on the concept of "diffusion toward electrode surfaces", detectable scale … depends on the diffusion coefficient, and it is in the range of 1–100 μm for conventional electrochemistry. By taking this …

Persistent link: https://www.econbiz.de/10005050557

Investigations on catalyzed steam gasification of biomass. Appendix B: feasibility study of methanol production via catalytic gasification of 2000 tons of wood per day

Mudge, L.K.; Weber, S.L.; Mitchell, D.H.; Sealock, L.J. Jr. - 2008

A study has been made of the economic feasibility of producing fuel grade methanol from wood via catalytic gasification with steam. The plant design in this study was developed from information on gasifier operation supplied by the Pacific Northwest Laboratory (PNL), operated by Battelle. PNL...

Persistent link: https://www.econbiz.de/10009437175

Doing more with less: The catalytic function of IMF lending and the role of program size

Krahnke, Tobias - 2020

Financial assistance provided by the International Monetary Fund (IMF) is supposed to unlock other financing, acting as a catalyst for private capital flows. The empirical evidence of the presence of such a catalytic effect has, however, been mixed. This paper shows that a possible explanation...

Persistent link: https://www.econbiz.de/10012201818

CO2 gasification of Powder River Basin coal catalyzed by a cost-effective and environmentally friendly iron catalyst

Zhang, Fan; Xu, Deping; Wang, Yonggang; Argyle, Morris D.; … - In: Applied Energy 145 (2015) C, pp. 295-305

CO2 gasification of a sub-bituminous Wyodak coal from the Powder River Basin (PRB) was conducted in a fixed-bed laboratory gasifier at atmospheric pressure with FeCO3 as a catalyst precursor. The effect of iron on the coal pyrolysis was evaluated by thermo-gravimetric analysis (TGA). Scanning...

Persistent link: https://www.econbiz.de/10011263279

A review: Conversion of bioglycerol into 1,3-propanediol via biological and chemical method

Lee, C.S.; Aroua, M.K.; Daud, W.M.A.W.; Cognet, P.; … - In: Renewable and Sustainable Energy Reviews 42 (2015) C, pp. 963-972

Today, the price of glycerol has dramatically dropped due to its oversupply from biodiesel production as well as oleochemical industry. Thus, it is essential to develop processes to transform bioglycerol into commercially valued products which is important to ensure sustainability in the...

Persistent link: https://www.econbiz.de/10011117095

From fossil fuels towards renewables: Inhibitory and catalytic effects on carbon thermochemical conversion during co-gasification of biomass with fossil fuels

Masnadi, Mohammad S.; Grace, John R.; Bi, Xiaotao T.; … - In: Applied Energy 140 (2015) C, pp. 196-209

Recent environmental regulatory sharp curbs on fossil fuel power plants have obliged industries to incorporate alternative sources of fuels for energy production. Cost and recovery of synthetic catalysts are major challenges in carbonaceous materials catalytic gasification. Biomass rich in...

Persistent link: https://www.econbiz.de/10011189430

Particle and NOx emissions of a non-road diesel engine with an SCR unit: The effect of fuel

Pietikäinen, Mari; Väliheikki, Ari; Oravisjärvi, Kati; … - In: Renewable Energy 77 (2015) C, pp. 377-385

Diesel engines are challenged to reduce their emissions. Nitrogen oxides (NOx), hydrocarbons, particulate matter and carbon dioxide are most important regulated diesel emissions. The legislation is driving for the use of renewable fuels in vehicles but all the impacts of those on emission...

Persistent link: https://www.econbiz.de/10011189998

Catalytic hydroliquefaction of charcoal CCB (copper, chromium and boron)-treated wood for bio-oil production: Influence of CCB salts, residence time and catalysts

Kinata, Silao Espérance; Loubar, Khaled; Paraschiv, Maria - In: Applied Energy 115 (2014) C, pp. 57-64

Thermochemical processes offer a feasible option for wood waste management and the recovery of a variety of useful chemicals. In this paper, hydroliquefaction with the use of catalysts was optimized to provide bio-oil from CCB-treated wood by reducing gaseous emissions of copper, chromium and...

Persistent link: https://www.econbiz.de/10010737701

Premium quality fuels and chemicals from the fluidised bed pyrolysis of biomass with zeolite catalyst upgrading

Horne, Patrick A.; Williams, Paul T. - In: Renewable Energy 5 (1994) 5, pp. 810-812

before and after catalysis were collected in a series of condensers and cold traps. In addition, gases were analysed off …-line by packed column gas chromatography. The composition of the oils and gases were determined before and after catalysis in …/mass spectrometry. The results showed that the oils before catalysis were highly oxygenated, after catalysis the oils were markedly …

Persistent link: https://www.econbiz.de/10010807064