نتایج جستجو برای: co2 separation
تعداد نتایج: 192048 فیلتر نتایج به سال:
Increasing atmospheric levels of CO2, in large part due to anthropogenic combustion of energy yielding hydrocarbons, portends significant if not catastrophic weather related events. One strategy to stabilize atmospheric CO2 levels is to capture the post-combustion product for disposal or, preferably, commercial use. The latter case, in particular, requires the development of both effective and ...
Using inorganic carbon measurements from an international survey effort in the 1990s and a tracer-based separation technique, we estimate a global oceanic anthropogenic carbon dioxide (CO2) sink for the period from 1800 to 1994 of 118 +/- 19 petagrams of carbon. The oceanic sink accounts for approximately 48% of the total fossil-fuel and cement-manufacturing emissions, implying that the terrest...
The formation of hydroquinone (HQ) clathrate and the guest behaviors binary (CH4 + CO2) gas mixtures were investigated by focusing on an application to separate CO2 from landfill gases. Spectroscopic measurements show that at two experimental pressures 20 40 bar, molecules are preferentially captured in HQ clathrates regardless composition. In addition, preferential occupation is observed more ...
The utilization of carbon dioxide (CO2) as a source of carbon in synthetic chemistry has been a practice exploited at the industrial level since the second half of the 19th century for the synthesis of urea [1a] and salicylic acid [1b, c]. CO2 has also long been used for making inorganic carbonates and pigments. A renewed interest in the industrial utilization of CO2 as a source of carbon arose...
Poly (ether-block-amide) /poly (ethylene glycol)/ carbon nanotubes mixed matrix membranes have been successfully fabricated using solvent evaporation method to determine the effect of ethylene oxide groups on the performance of produced membranes. The effects of CNTs (2-8 wt%) and PEG (up to 50 wt%)were investigated in both single and mixed gas test setup in different temperature and pressure. ...
In this work, we have modified a synthesized Y-type zeolite (Si/Al = 2.5), with three different amines to investigate of the influence of adsorbent’s surface modification on CO2 selectivity over CH4. The pristine and amine-functionalized NaY zeolites were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR), and N2 adsorption. The resu...
Gas separation membranes are one of the lowest energy technologies available for the separation of carbon dioxide from flue gas. Key to handling the immense scale of this separation is maximised membrane permeability at sufficient selectivity for CO2 over N2. For the first time it is revealed that metals can be post-synthetically exchanged in MOFs to drastically enhance gas transport performanc...
Several large natural gas resources around the world contain large amounts of CO2. Economic recovery of the CH4 from streams having CO2 as the majority component presents numerous technical challenges. One potential separation option is based on inorganic membranes. We describe here general aspects of the CO2/CH4 separation process, the technical requirements for a membrane-based separation sys...
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