scholarly journals U.S. Department of Energy Pacific Region Clean Energy Application Center (PCEAC)

2013 ◽  
Author(s):  
Tim Lipman ◽  
Dan Kammen ◽  
Vince McDonell ◽  
Scott Samuelsen ◽  
Asfaw Beyene ◽  
...  
Keyword(s):  
Clean Energy ◽  
Department Of Energy ◽  
Pacific Region ◽  
Energy Application

Balancing volumetric and gravimetric uptake in highly porous materials for clean energy

Science ◽  
2020 ◽  
Vol 368 (6488) ◽  
pp. 297-303 ◽  
Author(s):  
Zhijie Chen ◽  
Penghao Li ◽  
Ryther Anderson ◽  
Xingjie Wang ◽  
Xuan Zhang ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Clean Energy ◽  
Department Of Energy ◽  
High Porosity ◽  
Surface Areas ◽  
Metal Organic ◽  
Trinuclear Clusters ◽  
Temperature And Pressure ◽  
Pressure Swing ◽  
Highly Porous

A huge challenge facing scientists is the development of adsorbent materials that exhibit ultrahigh porosity but maintain balance between gravimetric and volumetric surface areas for the onboard storage of hydrogen and methane gas—alternatives to conventional fossil fuels. Here we report the simulation-motivated synthesis of ultraporous metal–organic frameworks (MOFs) based on metal trinuclear clusters, namely, NU-1501-M (M = Al or Fe). Relative to other ultraporous MOFs, NU-1501-Al exhibits concurrently a high gravimetric Brunauer−Emmett−Teller (BET) area of 7310 m2 g−1 and a volumetric BET area of 2060 m2 cm−3 while satisfying the four BET consistency criteria. The high porosity and surface area of this MOF yielded impressive gravimetric and volumetric storage performances for hydrogen and methane: NU-1501-Al surpasses the gravimetric methane storage U.S. Department of Energy target (0.5 g g−1) with an uptake of 0.66 g g−1 [262 cm3 (standard temperature and pressure, STP) cm−3] at 100 bar/270 K and a 5- to 100-bar working capacity of 0.60 g g−1 [238 cm3 (STP) cm−3] at 270 K; it also shows one of the best deliverable hydrogen capacities (14.0 weight %, 46.2 g liter−1) under a combined temperature and pressure swing (77 K/100 bar → 160 K/5 bar).

Oxy-Fuel Turbomachinery Development for Energy Intensive Industrial Applications

2012 ◽  
Author(s):  
Rebecca Hollis ◽  
Patrick Skutley ◽  
Carlos Ortiz ◽  
Vijo Varkey ◽  
Danise LePage ◽  
...  
Keyword(s):  
Power Generation ◽  
Carbon Capture ◽  
Power Plants ◽  
Clean Energy ◽  
Industrial Applications ◽  
Department Of Energy ◽  
Test Facility ◽  
Oxygen Injection ◽  
Capital Costs ◽  
Cost Of Electricity

Future fossil-fueled power generation systems will require emission control technologies such as carbon capture and sequestration (CCS) to comply with government greenhouse gas regulations. The three prime candidate technologies which permit carbon dioxide (CO2) to be captured and safely stored include pre-combustion, post-combustion capture and oxy-fuel (O-F) combustion. For more than a decade Clean Energy Systems, Inc. (CES) has been designing and demonstrating enabling technologies for oxy-fuel power generation; specifically steam generators, hot gas expanders and reheat combustors. Recently CES has partnered with Florida Turbine Technologies, Inc. (FTT) and Siemens Energy, Inc. to develop and demonstrate turbomachinery systems compatible with the unique characteristics of oxy-fuel working fluids. The team has adopted an aggressive, but economically viable development approach to advance turbine technology towards early product realization. Goals include short-term, incremental advances in power plant efficiency and output while minimizing capital costs and cost of electricity. Phase 2 of this development work has been greatly enhanced by a cooperative agreement with the U.S. Department of Energy (DOE). Under this program the team will design, manufacture and test a commercial-scale intermediate-pressure turbine (IPT) to be used in industrial O-F power plants. These plants will use diverse fuels and be capable of capturing 99% of the produced CO2 at competitive cycle efficiencies and cost of electricity. Initial plants will burn natural gas and generate more than 200MWe with near-zero emissions. To reduce development cost and schedule an existing gas turbine engine will be adapted for use as a high-temperature O-F IPT. The necessary modifications include the replacement of the engine’s air compressor with a thrust balance system and altering the engine’s air-breathing combustion system into a steam reheating system using direct fuel and oxygen injection. Excellent progress has been made to date. FTT has completed the detailed design and issued manufacturing drawings to convert a Siemens SGT-900 to an oxy-fuel turbine (OFT). Siemens has received, disassembled and inspected an SGT-900 B12 and ordered all necessary new components for engine changeover. Meanwhile CES has been working to upgrade an existing test facility to support demonstration of a “simple” oxy-fuel power cycle. Low-power demonstration testing of the newly assembled OFT-900 is expected to commence in late 2012.

scholarly journals U.S. DOE Southeast Clean Energy Application Center

2013 ◽  
Author(s):  
Isaac Panzarella ◽  
Pedro Mago ◽  
Stephen Kalland
Keyword(s):  
Clean Energy ◽  
Energy Application
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