Hydrogen adsorption in flame synthesized and lithium intercalated carbon nanofibers: a comparative study

Carbon nanofibers (CNF) have been synthesized under partial combustion conditions in a flame reactor using different mixtures of hydrocarbon gases in the presence and absence of precursors. The hydrogen (H2) adsorption studies have been carried out using a high pressure Sievert\u27s apparatus maintained at a constant temperature (24°C). The flame synthesized CNFs showed high degree of H2 adsorption capacities at 100 atm pressure. The highest H2 capacities recorded have been 4.1 wt% [for CNF produced by liquefied petroleum gas (LPG)-Air (E-17)], 3.7 wt% [for nano carbons produced by Methane-Acetylene-Air (EMAC-4)] and 5.04 wt% for [Lithium intercalated sample (Li-EMAC-4)] respectively

Concurrent Implementation of Red Black Trees

We offer Red Black Tree concurrent algorithms that logical ordering information is clearly maintained in the data structure, allowing clear separation from its physical tree architecture. With the property that an item only belongs to the tree if and only if it is an endpoint of an interval, we represent logical ordering using intervals. Thus, we are able to design lookup operations that are quick, simple, and devoid of synchronization. In this paper we implemented our Red Black Tree using Logical Ordering and evaluated the running time for insertion, Deletion and Contains Operations