nuclear steam reforming of methane

... methane reforming Currently, several methods have been developed to carry out methane reforming, including steam reforming, drying reforming, and partial oxidation of methane (POM) In steam reforming, ... hydrogen, the steam reforming (SR) of natural gas (mainly methane) has attracted increasing attention with aim of improving energy-efficiency of this process In contrast to the SR of methane, partial ... Background of desulfurization from natural gas Up to date, catalytic reforming of methane is considered as the most economical way to produce hydrogen Natural gas as the source of methane is...

Ngày tải lên: 09/09/2015, 10:13

... CO2 reforming of methane (OCRM) which combines partial oxidation of methane (POM) – an endothermic reaction – with CO2 reforming of methane (DRM) – an endothermic reaction A combination of these ... LH Langmuir-Hinshelwood OCRM Oxidative CO2 Reforming of Methane POM Partial Oxidation of Methane rWGS Reverse Water Gas Shift SRM Steam Reforming of Methane TCD Thermal Conductivity Detector TEM ... Kinetic model of CO2 reforming of methane on Ni/La2O3 catalyst 26 Table 2-3 Various kinetic models for CO2 reforming of methane 27 Table 2-4 Kinetic model for partial oxidation of methane 41 Table...

Ngày tải lên: 10/09/2015, 08:41

... preadsorbed of steam followed by continuously flow of ethanol and a heating ramp of 15 K min-1 over (a) Pt/Ca-Al2O3 and (b) Rh/Ca-Al2O3 155 Figure 6.9 Product distribution of ethanol steam reforming ... approximately 90% of all hydrogen is produced by steam reforming of natural gas with CO2 as a by-product [1] An alternative method of hydrogen production is via ethanol steam reforming (ESR) which ... Diesel C9-C24 46.3 Steam reforming of natural gas is one of the traditional methods used for production of hydrogen However, there is increasing interest in ethanol steam reforming (ESR, Eqn...

Ngày tải lên: 08/09/2015, 17:53

... structure of about m height The surface of the structure consists of grayblack microbial mat; the interior of the massive mat is pink The greenish-gray inner part of the structure consists of porous ... evidence for methane- fueled calcification and for the microbially mediated formation of carbonate structures Epifluorescence microscopy of sections of microbial mat revealed dense aggregations of archaea ... REPORTS methane The methane seeping from the microbial structures and from nearby sediment pockmarks is of biogenic origin, as indicated by ␦13C values of Ϫ62.4 to Ϫ68.3‰ (n ϭ...

Ngày tải lên: 12/06/2014, 11:18

... thiết bị reforming sơ cấp bao gồm chủ yếu khí CH4,CO ,H2 có nhiệt độ khoảng 7830C áp suất 30,9bar tiếp tuc đươc đưa vào thiết bị reforming thứ cấp với lượng không kí nóng Tại thiết bị reforming ... nhiệt độ cao nhiệt độ thấp 3.5 Thiết bị reforming sơ cấp Hình 3.10 Mô hình lò reforming kiểu ống hãng Topsoe Để cấp nhiệt theo cách thức cho toàn phản ứng reforming nước thu nhiệt, trình tiến hành ... 41 SV:Lê-Văn-Phước Cân nhiệt cấp qua thành ống thiết bị reforming lượng nhiệt tiêu thụ phản ứng reforming thu nhiệt vấn đề chủ chốt trình reforming nước Giá trị ứng suất cho phép lớn ống bị ảnh...

Ngày tải lên: 14/06/2014, 21:45

... conservative overhead of 50%, leading to a maximal expected dwell time in the new reactor of 24 days The main fermenter has an absolute volume of 430 L, and therefore, a needed input of 18 L of desizing ... amounts of biogas with a high methane content of almost 60 vol.% in a robust and trouble-free way The COD reduction in the wastewater of more than 85%, on one hand, and the production of a valuable ... production 5.3 m3/h Volume of the collection container 25 m3 Volume of the pre-chamber 10 m3 Volume of the main fermenter 100 m3 Volume of the post-fermenter 50 m3 Volume of the gas tank 300 m3 Figure...

Ngày tải lên: 20/06/2014, 21:20

... regulation of aerobic methane oxidation In contrast, understanding of the process of anaerobic methane oxidation is in its infancy Geochemical evidence points strongly towards a coupling of anaerobic methane ... activation of methane and could make the first step of reverse methanogenesis thermodynamically and kinetically possible Further in-depth mechanistic studies of this enzyme will be of great interest ... details of the two processes important for methane balance on Earth - aerobic and anaerobic methane oxidation - and suggest that these processes have more in common than just the substrate, methane, ...

Ngày tải lên: 14/08/2014, 14:21

... industry for the production of hydrogen is methane Methane steam reforming is an established process for large scale production of hydrogen [49-56] Recently, steam reforming of methane also attracted ... section about reforming mechanism, the study of the mechanism for methane reforming is very substantial for the study of mechanism for higher hydrocarbon reforming The study of mechanism of carbon ... reaction, heat transfer is one of the main technical issues for a steam reforming reactor Thus the reactors used in steam reforming process are usually in the form of a group reforming tubes in a row...

Ngày tải lên: 09/09/2015, 18:50

... catalysts: dispersed phase of platinum, TOF = 0.005 s−1 , crystalline phase of platinum; TOF = 0.08 s−1 , small particles of palladium; TOF = 0.02 s−1 , large particles of palladium; TOF = 1.3 s−1 The ... emissions of methane from NGVs must be necessarily reduced and this can be achieved by catalytic after-treatment of exhaust gases which would perform the complete oxidation of methane At least 60% methane ... the influence of residual chloride ions on the catalytic activity, the kinetic aspects of the oxidation of methane over these catalysts, the nature of the active sites, the influence of the metal...

Ngày tải lên: 08/10/2015, 22:56

... comprising 36.2% of H2 and a 1.51 m3 of syngas produced per kg of RDF, which in turns, gives 0.55 m3 of H2 per kg of RDF Considering that m3 of H2 can translate to roughly 0.002 barrels of oil (boe) ... coffee generates a significant amount of agricultural wastes Coffee husks, comprised of dry outer skin, pulp and parchment, are probably the major residues from the handling and processing of ... 6.50 6.48 4.2 Influence of steam in the gasification of different substrates Steam- to-biomass ratio (SBR) is used throughout this work in order to emphasize the effects of small variations on...

Ngày tải lên: 29/07/2016, 14:01

... C + H ←→ CH -74.52 (8) Steam Reforming of Methane standard heat of reaction at 298K were calculated from the standard heat of formation The development of an efficient steam gasification process ... Figure 9: Profiles of (a) dry gas yield, (b) carbon conversion, (c) tar yield (wt% of biomass) and (d) coke yield (% of carbon injected); with the temperature from steam gasification of 2-methoxy-4-methylphenol ... catalyst 4.1.2 Effect of Steam/ Biomass Ratio Figure reports both equilibrium and experimental dry gas yields and carbon conversions of glucose gasification with the variation of steam/ biomass ratios...

Ngày tải lên: 01/08/2016, 09:31

... ash yields of the spent catalysts were nearly double of those of the fresh catalysts The enrichment of inorganic species was much more than what can be expected from the consumption of char alone ... Min ZH, Asadullah M, Yimsiri P, Zhang S, Wu HW, Li C-Z Catalytic reforming of tar during gasification Part I Steam reforming of biomass tar using ilmenite as a catalyst Fuel 2011;90(5):1847–54 ... destruction of nascent tar during the pyrolysis and gasification of biomass Part II Roles of steam Fuel 2015;143:555–62 [19] Quyn DM, Wu HW, Li C-Z Volatilisation and catalytic effects of alkali...

Ngày tải lên: 02/08/2016, 09:36

Ngày tải lên: 08/08/2012, 17:20

... capacity sizes of CSP plants, as well as the estimation of efficiency and expected capital cost of the power block for various steam turbine capacities is carried out The cost of electricity of CSP plants ... the purpose of this analysis, the Steam Pro software module of the Thermoflow Suite 18 package [1] is used The investigation covers all three major types of steam turbines, that is, condensing, ... increase of the capacity of the plant Particularly, for the case of condensing steam turbine, the exhaust pressure is at 50mbar, and the temperature at 33°C, which corresponds to steam quality of 0.85...

Ngày tải lên: 05/09/2013, 14:59

... produce steam with 28°C of superheat, allowing the steam turbo-generator to run in the superheated regime and avoid the issue of having to deal with low-quality, efficiency-reducing moist steam of ... work, an overview of current and future sustainable nuclear energy is carried out In particular, the nuclear technology is described and the classification of the current and future nuclear reactors ... make steam to generate electricity The principles for using nuclear power to produce electricity are the same for most types of reactors The energy released from the continuous fission of atoms of...

Ngày tải lên: 05/09/2013, 15:28

... The effect of pressure loss of steam in the condenser on the enthalpy of condensate is taken care by introducing the concept of under-cooling of the condensate The inefficiencies of the condenser ... 2.52 1.3 Mass of Fuel (% of Air) Mass of Blade Cooling Air (% of Air) 1.8 2.50 2.48 1.2 2.46 250 260 270 280 290 300 Compressor Inlet Temperature (K) Figure 5(a) Variation of mass of blade cooling ... mass of steam with enthalpy change during the expansion process wst = ∑ [m s {(hst )in − (hst )out }] mech η where (14) wst is the steam turbine work (kJ), (h ) and (h ) enthalpy in and out of steam...

Ngày tải lên: 05/09/2013, 15:28

... cost of electricity is 1,18 $/MW The cost of electricity is approximately twice more than steam cost Besides, it has also been seen that due to the rise in boiler temperature, the unit cost of steam ... the exergy cost of the product Results and discussion The first and second law analysis of thermodynamics is applied to the examined steam power plant According to the results of the first law ... Figure Variation with boiler steam temperature depending on fluid mass flow rate of turbine power In Figure 3, the total irreversibility rate of the system depending on steam turbine inlet temperature...

Ngày tải lên: 05/09/2013, 16:11

... patterns in the behavior of nuclei divulge about the nature of nuclear forces and the mechanism of nuclear binding? • What is the nature of extended nucleonic matter? • How can nuclear structure and ... program that offer a glimpse into future areas of inquiry, are the investigation of new forms of nuclear matter such as neutron skins occurring on the surfaces of nuclei having large excesses of neutrons ... the nature of nuclear collective motion Excellent tests of the nuclear shell model were offered by recent studies of the tin (Sn) isotopes The nucleus tin has a magic number (50) of protons and...

Ngày tải lên: 12/02/2014, 16:20