We consider the case of two real variables. A function g : R 2 ! R is blowanalytic if there exists a composition of simple blowings up, each centered at a point, = 1 n : X ! R 2 such that g is analytic ([7][4]). If a homeomorphism h : R 2 ! R 2 and its inverse, h 1 , both have blow-analytic components, we say h is blow-analytic. S. Koike([5]) was the rst to discover a blow-analytic homeomorphis...

During the heating of organic refuse out of contact with air, water, gases and liquids are evolved, leaving a char residue. Ten refuse components from domestic waste were distilled on a laboratory scale, the gaseous products were analyzed and the yields determined. The gases included mainly CO2, CO, H2, CH4, with mixture calorific values of 300 400 Btu per standard cu ft. The yield weights were...

The present study is in two parts, the first part describes an investigation that was undertaken to determine the feasibility and hydrodynamic behaviour of a cold model circulating fluidized bed system proposed for the continuous combustion-gasification of biomass. The design is based on the principle that the char produced in the gasifier is circulated with the bed material and combusted in a ...

Char produced from lignocellulosic biomass via slow pyrolysis have become one of the most feasible alternatives that can partially replace utilisation fossil fuels for energy production. In this study, relationship between compositions biomass, operating conditions pyrolysis, and characteristics char been analysed by using multiple nonlinear regression (MnLR) artificial neural networks (ANN). S...

The worldwide concern regarding global warming has increased the interest of using biomass as a renewable and CO2 neutral source of energy. Pyrolysis oil (PO), as one of the most important product of biomass conversion, has the potential to be used as a fuel oil substitute in many applications for heat and electricity generation. However, pyrolysis oil properties and its behavior during combust...

Production of energy from renewable biomass resources would reduce atmospheric CO2 increase associated with fossil fuel use. The objective of this study was to evaluate the energy potential of a thermochemical conversion platform of three herbaceous biomass crops. The biomass crops tested were stems of alfalfa, a legume, and whole herbage of reed canarygrass and eastern gamagrass, cooland warms...

LetG be a connected semisimple algebraic group over an algebraically closed field k. In 1965 Steinberg proved that if G is simply connected, then in G there exists a closed irreducible cross-section of the set of closures of regular conjugacy classes. We prove that in arbitrary G such a cross-section exists if and only if the universal covering isogeny τ : b G → G is bijective. In particular, f...

Processing of pine wood chips in a pilot-scale downdraft gasifier generated a carbon-rich fly ash as a byproduct. Studies on biomass-derived fly ashes have generally focused on their direct characterisation, as generated, to develop options for utilisation or disposal. Analogous to studies on coal-derived fly ashes, strategies were applied here to assess the feasibility of isolating chars for v...

In order to utilize high sulfur (3-6%) coals in various industries which otherwise cannot be utilized directly or even as a blend, studies on pyrolysis of four high sulfur NE regions Indian coals viz. 60ft Tikak, 20ft Tikak, Surupi and Bapung coal from Makum Coalfields of Meghalaya in presence of hydrogen were carried out at 900C. The steam was generated by heating waste water followed by its s...