Based on field data from 10 USA cities and national urban tree cover data, it is estimated that urban trees in the coterminous USA currently store 700 million tonnes of carbon ($14,300 million value) with a gross carbon sequestration rate of 22.8 million tC/yr ($460 million/year). Carbon storage within cities ranges from 1.2 million tC in New York, NY, to 19,300 tC in Jersey City, NJ. Regions w...

A multiscale theoretical approach is used for the investigation of hydrogen storage in silicon-carbon nanotubes (SiCNTs). First, ab initio calculations at the density functional level of theory (DFT) showed an increase of 20% in the binding energy of H2 in SiCNTs compared with pure carbon nanotubes (CNTs). This is explained by the alternative charges that exist in the SiCNT walls. Second, class...

Carbon is a very versatile element that can crystallize in the forms of diamond or graphite. There are many noncrystalline carbons, known as amorphous carbons. An amorphous carbon with a high fraction of diamond-like (sp3) bonds is named diamond-like carbon (DLC). Unlike diamond, DLC can be deposited at room temperature. Furthermore, its properties can be tuned by changing the sp3 content, the ...

A mathematical model was developed which simulates the self-discharge capacity losses in the carbon anode for a SONY 18650 lithium-ion attery. The model determines the capacity loss during storage on the basis of a continuous reduction of organic solvent and de-intercalation of ithium at the carbon/electrolyte interface. The state of charge, open circuit potential, capacity loss and film resist...

A cybernetic model is proposed to examine generic features of storage pathways. This model is capable of describing synthesis of carbon and non-carbon storage polymers. The effect of environmental conditions is evaluated using storage polymer level as a fraction of total biomass as a gauge of pathway performance. The base wild-type pathway is then analyzed to determine the effect of genetic alt...

Introduction The UK Carbon Capture and Storage Consortium Project was started in June 2005 by a group of 14 UK universities and research institutions with funding from the UK Research Councils’ Towards a Sustainable Energy Economy (TSEC) Programme. The mission of the consortium is: “to promote an understanding of how options for decoupling fossil fuel use from carbon emissions through the use o...

Hydrogen, a renewable and environmentally friendly energy resource, has drawn much attention in the past decades. Carbon nanotubes (CNTs) have been studied as potential candidates for hydrogen storage [1-3]. On the other hand, simulations have predicted low uptake of hydrogen on idealized SWNTs [4-7]. Y.C Ma et al [8] has explored a valid method to simulate the hydrogen storage in carbon nanotu...

An inventory study of the energy use in cold storage installations in The Netherlands showed that frozen storage and combined chilled storage and distribution are responsible for a substantial part of the energy consumption of the sector. Two reference complexes including a standard number of refrigerated rooms can represent these two categories of plants. These reference complexes are used to ...

A number of nonlinear microbial models of soil carbon decomposition have been developed. Some of them have been applied globally but have yet to be shown to realistically represent soil carbon dynamics in the field. A thorough analysis of their key differences is needed to inform future model developments. Here we compare two nonlinear microbial models of soil carbon decomposition: one based on...

In this study, the kinetics of gas hydrate formation in the presence of tetra-n-butyl ammonium fluoride (TBAF) and cetyl trimethyl ammonium bromide surface active ingredient (CTAB) with zinc nano oxide (ZnO) are investigated and the most important kinetic parameters of hydrate formation such as their induction time and storage capacity were measured. The kinetic experiments were carried out in ...