Maximizing Ether Oxygen Content in Polymers for Membrane CO2 Removal from Natural Gas

2019 ◽  
Vol 11 (11) ◽  
pp. 10933-10940 ◽  
Author(s):  
Junyi Liu ◽  
Gengyi Zhang ◽  
Krysta Clark ◽  
Haiqing Lin
Keyword(s):  
Natural Gas ◽  
Oxygen Content ◽  
Co2 Removal ◽  
Ether Oxygen

Gas Turbine Combined Cycle With CO2-Capture Using Auto-Thermal Reforming of Natural Gas

2000 ◽  
Author(s):  
Thormod Andersen ◽  
Hanne M. Kvamsdal ◽  
Olav Bolland
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Process Integration ◽  
Combined Cycle ◽  
Co2 Removal ◽  
Gas Turbine Combustor ◽  
Chemical Absorption ◽  
Fuel Gas ◽  
The Impact ◽  
Water Gas

A concept for capturing and sequestering CO2 from a natural gas fired combined cycle power plant is presented. The present approach is to decarbonise the fuel prior to combustion by reforming natural gas, producing a hydrogen-rich fuel. The reforming process consists of an air-blown pressurised auto-thermal reformer that produces a gas containing H2, CO and a small fraction of CH4 as combustible components. The gas is then led through a water gas shift reactor, where the equilibrium of CO and H2O is shifted towards CO2 and H2. The CO2 is then captured from the resulting gas by chemical absorption. The gas turbine of this system is then fed with a fuel gas containing approximately 50% H2. In order to achieve acceptable level of fuel-to-electricity conversion efficiency, this kind of process is attractive because of the possibility of process integration between the combined cycle and the reforming process. A comparison is made between a “standard” combined cycle and the current process with CO2-removal. This study also comprise an investigation of using a lower pressure level in the reforming section than in the gas turbine combustor and the impact of reduced steam/carbon ratio in the main reformer. The impact on gas turbine operation because of massive air bleed and the use of a hydrogen rich fuel is discussed.

Neural Network Modeling of Coefficient of Burden Resistance to the Gas Movement in the Lower Part of the Blast Furnace in Conditions of Operation with Coke Nut

2016 ◽  
Vol 870 ◽  
pp. 487-491
Author(s):  
Salavat K. Sibagatullin ◽  
Aleksandr S. Kharchenko ◽  
Marina V. Potapova
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Oxygen Content ◽  
Resistance Coefficient ◽  
Reactivity Index ◽  
Neural Network Modeling ◽  
Coke Strength ◽  
Water Steam ◽  
Gas Consumption ◽  
Natural Gas Consumption

A mathematical model based on the use of artificial neural networks for forecast of resistance coefficient of burden to the gas at the bottom of the blast furnace with using of coke nut by processing of data array for the OJSC "MMK" blast furnaces (capacity of 1370 m3), equipped with a chute-type bell-less charging device has been created. This test has shown the adequacy of the model to real data. Influence of such factors as characteristics of blast (oxygen content, temperature, natural gas and water steam consumption), iron ore (raw material consumption per time unit, FeO, MgO, Al2O3 content, fraction, basicity), coke (wearability (M10), impact strength (M25), coke strength reactivity (CSR), coke reactivity index (CRI)) on gas dynamics variation at the lower part of the black furnace have been determined. Average relative prediction error does not exceed 0.28 %, the maximum of the sample is 2.82 %. The oxygen content in the blast has the biggest effect on the burden resistance coefficient. When oxygen concentration is more than 25.2 %, the increase of natural gas consumption improves gas-dynamic conditions in the lower part of blast furnace. With the decrease of oxygen content in the blast, the influence of natural gas consumption on coefficient of burden resistance varies in the opposite direction. The reduction of coke wearability (M10) by 0.05 % abs. or the increase of coke strength reactivity (CSR) by 0.14 % abs. has compensated negative effect of coke nut (consumption 4 kg/t of iron) on blast furnace operation.

scholarly journals Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 118 ◽  
Author(s):  
Yunhan Chu ◽  
Xuezhong He
Keyword(s):  
Natural Gas ◽  
Cost Evaluation ◽  
Co2 Removal ◽  
Carbon Membrane ◽  
Carbon Membranes ◽  
Feed Pressure ◽  
Gas Sweetening ◽  
Processing Cost ◽  
Future Work ◽  
Natural Gas Sweetening

Natural gas sweetening is required to remove the acid gas CO2 to meet gas grid specifications. Membrane technology has a great potential in this application compared to the state-of-the-art amine absorption technology. Carbon membranes are of particular interest due to their high CO2/CH4 selectivity of over 100. In order to document the advantages of carbon membranes for natural gas (NG) sweetening, HYSYS simulation and cost evaluation were conducted in this work. A two-stage carbon membrane process with recycling in the second stage was found to be technically feasible to achieve >98% CH4 with <2% CH4 loss. The specific natural gas processing cost of 1.122 × 10−2 $/m3 sweet NG was estimated at a feed pressure of 90 bar, which was significantly dependent on the capital-related cost. Future work on improving carbon membrane performance is required to increase the competitiveness of carbon membranes for natural gas sweetening.

Enhanced cryogenic packed bed with optimal CO2 removal from natural gas; a joint computational and experimental approach

Cryogenics ◽  
2020 ◽  
Vol 105 ◽  
pp. 103010 ◽  
Author(s):  
Muhammad Babar ◽  
Mohamad Azmi Bustam ◽  
Abdulhalim Shah Maulud ◽  
Abulhassan Ali ◽  
Ahmad Mukhtar ◽  
...  
Keyword(s):  
Natural Gas ◽  
Experimental Approach ◽  
Packed Bed ◽  
Co2 Removal

Enhancing the Supersonic Gas Separation operating envelope through process control strategies of the feed conditioning plant for offshore CO2 removal from natural gas

2020 ◽  
Vol 94 ◽  
pp. 102928
Author(s):  
Nurzatil Aqmar Othman ◽  
Lemma Dendena Tufa ◽  
Haslinda Zabiri ◽  
Abdullah Al-Mubarak Md Jalil ◽  
Khairul Rostani
Keyword(s):  
Natural Gas ◽  
Process Control ◽  
Gas Separation ◽  
Control Strategies ◽  
Co2 Removal
Sign in / Sign up

Export Citation Format

Share Document