نتایج جستجو برای: petroleum chemistry
تعداد نتایج: 124700 فیلتر نتایج به سال:
The objective of this research was to evaluate new types of surfactants based on renewable materials (sugar and protein-based surfactants) for use in ink removal from recycled paper via flotation deinking. By applying green chemistry approaches we aim to minimize the environmental impact of deinking agents and also to open an avenue for a number of products that are to be generated from the uti...
Acrylonitrile (ACN) is a petroleum-derived compound used in resins, polymers, acrylics, and carbon fiber. We present a process for renewable ACN production using 3-hydroxypropionic acid (3-HP), which can be produced microbially from sugars. The process achieves ACN molar yields exceeding 90% from ethyl 3-hydroxypropanoate (ethyl 3-HP) via dehydration and nitrilation with ammonia over an inexpen...
Equilibrium Structures and Vibrational Assignments for Isoamyl Alcohol and tert-Amyl Alcohol: A Density Functional Study Wolfgang Förner and Hassan M. Badawi Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia Supporting Information Table S1. Internal coordinate definitions of isoamyl alcohol and tert-amyl alcohol (for atom numbering see Figure 1...
Electrospun non-woven poly(ε-caprolactone) (PCL) microfiber meshes are described as biodegradable, mechanically robust, and reusable polymeric oil sorbents capable of selectively retrieving oil from simulated oil spills in both fresh and seawater scenarios. Hydrophobic PCL meshes have >99.5% (oil over water) oil selectivity and oil absorption capacities of ~10 grams of oil per gram of sorbent m...
3 Department of Chemistry, Gurukula Kangri Vishwavidyalaya, Haridwar, Uttarakhand, (India) ABSTRACT In the present study the effect of maceration and soxhlet extraction from plant leaves of Casearia tomentosa were compared for phytochemical screening and antioxidant activity using petroleum ether as solvent. The phytochemical screening was evaluated using standard protocols and the antioxidant ...
Simulations of PDE-based systems, such as ight vehicles, the global climate, petroleum reservoirs, semiconductor devices, and nuclear weapons, typically perform an order of magnitude or more below other scienti c simulations (e.g., from chemistry and physics) with dense linear algebra or N-body kernels at their core. In this presentation, we brie y review the algorithmic structure of typical PD...
TOUGHREACT is a numerical simulation program for chemically reactive nonisothermal flows of multiphase fluids in porous and fractured media, and was developed by introducing reactive chemistry into the multiphase fluid and heat flow simulator TOUGH2 V2. The first version of TOUGHREACT was released to the public through the U.S. Department of Energy’s Energy Science and Technology Software Cente...
Biopolymers and their derivatives are being actively investigated as substitutes for petroleum-based polymers. This has generated an intense interest in investigating new solvents, in particular for cellulose, chitin/chitosan, and starch. This overview focuses on recent advances in the dissolution and derivatization of these polysaccharides in solutions of strong electrolytes in dipolar aprotic...
Microbial enhanced oil recovery: literature survey http://www.clw.csiro.au/publications/science/2008/ WFO-MicrobialOilRecovery.pdf This report is well referenced and contains some general information on enhanced recovery techniques and biosurfactants. Oil spill: Wikipedia http://en.wikipedia.org/wiki/Oil_spill This Wikipedia entry is a good starting point for information on oil spills. Parts of...
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