We develop a novel superstructure of algal biorefinery processes for biological carbon sequestration and utilization, encompassing off-gas purification, algae cultivation, harvesting and dewatering, lipid extraction, remnant treatment, biogas utilization, and algal oil upgrading stages. Based on the superstructure, we propose a mixed-integer nonlinear programming (MINLP) model to minimize the u...

Australia's tidal marshes have suffered significant losses but their recently recognised importance in CO2 sequestration is creating opportunities for their protection and restoration. We compiled all available data on soil organic carbon (OC) storage in Australia's tidal marshes (323 cores). OC stocks in the surface 1 m averaged 165.41 (SE 6.96) Mg OC ha-1 (range 14-963 Mg OC ha-1). The mean O...

CO2 sequestration of the forests in Oita Prefecture, Japan, was estimated using satellite remote sensing data. First, hybrid classification of the optical LANDSAT ETM+ data was performed using GIS to produce a detailed land cover map. CO2 sequestration for each forest type was calculated using the sequestration rates per unit area multiplied by the forest areas obtained from the land cover map ...

Title of Thesis: MODELING OF MINERAL TRAPPING FOR CO2 SEQUESTRATION Mohammad Alizadeh Nomeli, MS, 2011 Thesis Directed By: Advisor: Dr. Amir Riaz Co-advisor: Dr. Alba Torrents Department of Civil and Environmental Engineering In order to prevent CO2 concentrations in the atmosphere from rising to unacceptable levels, carbon dioxide is sequestered beneath the ground surface. CO2 can be trapped a...

Carbon sequestration by reacting naturally occurring Mg and Ca containing minerals with CO2 to form carbonates has many unique advantages. Most notably is the fact that carbonates have a lower energy state than CO2, which is why mineral carbonation is thermodynamically favorable and occurs naturally (e.g., the weathering of rock over geologic time periods). Secondly, the raw materials such as m...

Sedimentary basins are suitable to a different degree for CO2 geological sequestration as a result of various intrinsic and extrinsic characteristics. This paper screened and ranked the Iullemmeden Basin of Nigeria sector based on Bachu (2003) ranking and screening criteria; evaluating factors such as tectonic setting, basin size and depth, geology, hydrogeology, hydrocarbon potentials, climate...

Underground injection of gas is a common practice in the oil and gas industry. Injection into deep, brine-saturated formations is a commercially proven method of sequestering CO2 . However, it has long been known that displacement of a connate fluid by a less viscous fluid produces unstable displacement fronts with significant fingering. This fingering allows only a small fraction of the pore v...

16 17 The global warming of Earth's near-surface, air and oceans in recent decades is a direct 18 consequence of anthropogenic emission of greenhouse gases into the atmosphere such as CO2, 19 CH4, N2O and CFCs. The CO2 emissions contribute approximately 60% to this climate change. 20 This study investigates experimentally the aqueous carbonation mechanisms of an alkaline paper 21 mill waste con...

Carbon dioxide (CO2) is a greenhouse gas that is customarily released to the environment during the usage of fossil fuels, including electric power generation. With the projected increase in consumption and demand for fossil fuels, CO2 emissions will correspondingly increase in the absence of any capture/sequestration strategy. In view that CO2 is a greenhouse gas with the potential to contribu...

One of the industrial revolution’s most insidious environmental legacies—dangerous atmospheric concentrations of CO2—can no longer be ignored. With “business-as-usual” projections rapidly approaching a grim horizon of climatic consequences, there is an urgent need to develop innovative strategies for CO2 stabilization that either reduce emissions through improved energy efficiency, or eliminate...