Hydrates in sediments : their role in wellbore/casing integrity and CO2 sequestration

Gas hydrates have attracted much interest among researchers recently because of their wide range of applications. The impact of natural gas hydrates in subsea sediments on the development of conventional hydrocarbon reservoirs in deep offshore and the potential role of CO2 hydrates as a secondary safety factor in subsurface storage of CO2 are the key areas in this thesis. Several experiments were conducted on synthetic samples containing methane hydrate with different hydrate saturations to measure their geophysical properties, mechanical properties and understand their mechanical behaviour at realistic conditions. A numerical model was also developed with ABAQUS (a finite element package) to investigate the casing stability of the wellbore drilled in gas hydrate bearing sediments in deep offshore environments using the measured properties of gas hydrate bearing sediments under different scenarios. The role of hydrates in subsurface storage of CO2 was studied using a unique experimental set-up by simulating geothermal temperature gradient. The objective was to investigate whether CO2 leaked from subsurface storage sites can be converted into hydrates, providing a secondary seal against further CO2 leakage to ocean/atmosphere.Engineering and Physical Sciences Research Council (EPSRC

Effect Of Organomodified Nanoclay In Poly (3-Hydroxybutyrate) (Phb)-, Epoxidized Natural Rubber (Enr-50) And Phb/Enr-50 Blend Nanocomposites

This treatise investigates the influences of alkyl ammonium organomodified montmorillonite (MMT) on the property profiles of biodegradable polyester, PHB, an epoxy modified natural rubber, ENR-50, and their respective PHB/ENR-50 blends. Risalah ini mengkaji pengaruh montmorilonit (MMT) diubahsuai dengan organo alkil ammonium terhadap profil ciri poliester terbiodegradasi, PHB, getah asli terubahsuai, ENR-50, dan adunan PHB/ENR-50. Beberapa komposisi hibrid nano telah disediakan dengan penyebaran lapisan MMT nano dalam larutan polimer menggunakan teknik acuan pelarut

Articulating Local Politics and Market Forces for Economic Development: A Case Study of Ethanol Development in Upstate New York

CaRDI Reports Issue 8; Community & Energy: Economics of Energy; Community & Energy: Renewable Energy Sources & Sustainabilit

Ammonium chloride; as a mild and efficient catalyst for the synthesis of some 2-arylbenzothiazoles and bisbenzothiazole derivatives

An efficient protocol has been developed for the preparation of a series of 2-arylbenzothiazoles derivatives from condensation of 2-aminothiophenol with aromatic aldehydes using ammonium chloride, which is a very inexpensive, metal-free and readily available reagent. The target compounds were obtained in good to excellent yields (58-92%) under fairly mild reaction conditions at room temperature

The Burr XII-Burr XII Distribution: Mathematical Properties and Characterizations

We introduce a new continuous distribution called the Burr XII-Burr XII distribution. Some of its properties are derived. The method of maximum likelihood is used to estimate the unknown parameters. An application is provided with details to illustrate the importance of the new. The new model provides adequate fits as compared to other related models with smallest values for A-IC, B-IC, CA-IC and HQ-IC. Characterization results are presented based on two truncated moments, hazard function as well as based on the conditional expectation

Economic Development in New York State: An Overview of the Project Development Process

CaRDI Reports Issue

Perovskites-Based Nanomaterials for Chemical Sensors

The perovskite structure is adopted by many compounds in solid-state chemistry. The sensitivity, selectivity, and stability of many perovskite nanomaterials have been devoted the most attention for chemical sensors. They are capable to sense the level of small molecules such as O2, NO, and CO. This chapter provides a comprehensive overview of perovskite nanoscale materials that concentrate on chemical sensors. The perovskite structure, with two differently sized cations, is amenable to a variety of dopant additions. This flexibility allows for the control of transport and catalytic properties, which are important for improving sensor performance. We devote the most attention on the synthesis, structural information, and sensing mechanism. We will later elaborate on the development mechanism of chemical sensors based on perovskite nanomaterials. We conclude this chapter with the personal perspectives on the directions toward future works on a novelty of nanostructured chemical sensors