Abstract Biochar produced from pyrolysis of biomass has been developed as a platform carbonaceous material that can be used in various applications. The specific surface area (SSA) and functionalities such N-containing functional groups biochar are the most significant properties determining application performance carbon areas, removal pollutants, adsorption CO 2 H , catalysis, energy storage....

Odd-char multivariate hidden field equations, 2008.

The retardancy effect of char formation upon the flammability of thermally thin products is investigated. The char is formed in a single-step non-competitive scheme and is assumed to be thermally stable. The criterion for ignition is that of a critical mass flux of volatiles from the solid into the gas phase. Both steady-state and transient formulations of the model are considered. In the high ...

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We show that the locus of the foci of a family of ellipses that are tangential to the sides of a triangle with one prescribed point of tangency is an elliptic curve. We further show that every isomorphism class of elliptic curves over an algebraically closed field K of char(K) 6= 2, 3 can be realized in this manner. On varying the triangle, one can get all elliptic curves over an algebraically ...

Abstract Several chemical properties of alkaline soils play an important role in dissolving phosphate minerals, which greatly affect the phosphorous availability to plants. The current study was carried out assess bone char application on and distribution phosphorus some sandy soils. This incubation experiment performed by selecting from different locations Upper Egypt: Arab El-Awamer (Assiut G...