共查询到19条相似文献,搜索用时 93 毫秒
1.
我国天然气(主要成分CH4)潜在资源丰富,利用CH4进行转化生产CO+H2合成气,以生产众多的化工产品。蒸汽转化炉系特殊昂贵的关键设备,发展高效率、低造价的炉型,有其重要的经济意义。本文通过生产实践对圆筒形蒸汽转化炉进行分析总结并介绍应用前景。 相似文献
2.
我国天然气(主要成份CH_4)潜在资源丰富,利用CH_4进行转化生产CO+H_2合成气,以生产众多的化工产品。蒸汽转化炉系特殊昂贵的关键设备,发展高效率、低造价的炉型,有其重要的经济意义。本文就通过生产实践对圆筒型蒸汽转化炉进行分析总结及其应用前景。 相似文献
3.
我国天然气(主要成份CH4)潜在资源丰富,利用CH4进行转化生产CO+H2合成气,以生产众多的化工产品。蒸汽转化炉系特殊昂贵的关键设备,发展高效率,低造价的炉型,有其重要的经济意义。本文就通过生产实践对圆筒型蒸汽转化炉进行分析总结及其应用机理。 相似文献
4.
天然气(CH4)转化制得CO+H2合成气可以生产氨、甲醇及有机化工产品,需要按照转化原理进行工艺优化,以节省原料消耗,满足合成产品对组分要求。 相似文献
5.
6.
天然气(CH4)转化制得CO+H2合成气可以生产氨、甲醇及有机化工产品,需要按照转化原理进行工艺优化,以节省原料消耗,满足合成产品对组分要求. 相似文献
7.
8.
综述了目前转化利用天然气制备合成气的主要方法,包括甲烷水蒸气重整、甲烷部分氧化、甲烷二氧化碳重整、甲烷水蒸气重整与部分氧化耦合反应、甲烷部分氧化与二氧化碳重整耦合反应、甲烷水蒸气重整与二氧化碳重整耦合反应以及甲烷的三重整反应,重点介绍了前3种典型反应所用的催化剂,最后提出将这3种典型反应耦合使用,并辅以晶格氧工艺、等离子体技术、微波技术是未来甲烷转化制备合成气的发展趋势。 相似文献
9.
介绍天然气制合成气的工艺组成及国内外发展动态,着重介绍ACZY型天然气催化剂与氧化制合成的转化催化剂的研制和工业试运行情况。 相似文献
10.
11.
In order to produce synthesis gas (syngas), four reforming processes including two stand-alone primary and secondary reformers and two combined configurations are investigated. With changing operating parameters and arrangement of the reformers (i.e. stand-alone, parallel, and series), the syngas may be obtained for different applications such as methanol, Fischer-Tropsch (FT), and ammonia synthesis. After study of several arrangements, the selected cases are simulated. Due to the shift some reforming duty from the primary reformer to the secondary one, the primary size and the total fired duty are reduced. The Non-Sorting Genetic Algorithm II (NSGA-II) optimization method is applied for the problem based on the practical point of view. It is shown that the parallel case is preferable in accordance to the high productivity object. For an optimum point, parallel case has 58% of productivity of syngas more than that of series one. However, the series configuration consumes lower fuel (361.1 kmol h−1, in comparison to the parallel case with 437.19) and releases lower amount of CO2 emission. It is shown that the series arrangement has an average of 13.22% of released CO2 molar flow less than that of parallel arrangement. 相似文献
12.
Xinwen Zhou Caixia ChenFuchen Wang 《Chemical Engineering and Processing: Process Intensification》2010
Non-catalytic partial oxidation of natural gas/O2/H2O mixture at elevated pressures was simulated kinetically using Chemkin package incorporating detailed reaction mechanisms of methane oxidation. The dependence of reaction time was investigated as a function of inlet temperature, system pressure, and O2/CH4 ratio. The conversion to products was predicted to complete within a residence time of less than 0.1 ms at pressures greater than 30 atm and temperatures higher than 1450 K. A minimum O2/CH4 ratio of 0.64 was found necessary for a complete methane conversion at the conditions typical for the industrial reformer. The effect of O2/H2O in the feed gas was examined computationally, and the results suggested that adding H2O in the feed gas could be a viable tool for adjusting the H2/CO ratio in the products and for controlling the flame temperature. Formations of higher order hydrocarbons and soot, which may play important roles in the actual fuel-rich conversion environment, are not considered in the present study. 相似文献
13.
14.
Lirong Kang Jianmin Zhang Hui Lian Ming Luo 《Korean Journal of Chemical Engineering》2007,24(3):508-511
A co-pyrolysis experiment of coal and natural gas was investigated on a fixed-bed reactor. SEM was used to study the structure
changes of the exterior surface of char prepared in this co-pyrolysis experiment, while GC was also utilized to analyze the
associated gas. The result showed that, with increasing temperature, the coal char tended to agglomerate. GC and SEM results
show that the CH4 decomposition on the exterior surface of char was turned to filamentous char and extended around like coral. It was also
proved that the co-pyrolysis of coal and natural gas promoted syngas production. A synergistic effect of coal and natural
gas does exist during this process.
This work was presented at the 6
th
Korea-China Workshop on Clean Energy Technology held at Busan, Korea, July 4–7, 2006. 相似文献
15.
Optimal design and operation of a natural gas tri-reforming reactor for DME synthesis 总被引:1,自引:0,他引:1
Wonjun Cho Taekyong Song Alexander Mitsos J. Thomas McKinnon Glen H. Ko John E. Tolsma Douglas Denholm Taeshin Park 《Catalysis Today》2009,139(4):261
Korea Gas Corporation (KOGAS) is developing a new di-methyl-ether (DME) plant. Syngas is provided by natural gas tri-reforming, in a reactor consisting of a homogenous part where oxidation leads to a temperature increase required for the reforming reactions and a catalytic part where the reforming reactions take place. A first principle model for the tri-reforming reactor is developed. A kinetic mechanism is proposed combining homogeneous gas-phase reactions and heterogeneous catalytic reactions. The proposed model is systematically calibrated and validated with global sensitivity analysis followed by global parameter estimation against concentration measurements of a lab-scale prototype reactor and comparisons of the sensitivity of the outlet as a function of inlet composition and design parameters with experimental results. The validated model is finally used for the optimization of design variables such as length ratio of homogeneous and heterogeneous section and operational variables such as the feed composition. 相似文献
16.
Xueping Song 《Fuel》2005,84(5):525-531
Production of synthesis gas with coal and natural gas co-gasification is a new process based on coupling of methane steam-reforming and coal gasification. The process concept is discussed in this paper. Experiments are carried out in a laboratory fixed-bed gasifying reactor to investigate the effect of feedstock on composition, ratio of hydrogen to carbon monoxide, concentrations of hydrogen and carbon monoxide in the produced raw synthesis gas. Preliminary experimental results indicate that the effect of steam flow rate on component, ratio of hydrogen to carbon monoxide and concentrations of hydrogen and carbon monoxide of the raw synthesis gas is slight, while the effect of oxygen flow rate is pronounced. When the ratio of oxygen to methane in feedstock is below 1, the ratio of hydrogen to carbon monoxide is greater than 1 and the total concentration of hydrogen and carbon monoxide is above 90%. Comparison of experimental results with calculated results shows that the composition of raw synthesis gas is near equilibrium. 相似文献
17.
Muhammad Mufti Azis Erik Jerndal Henrik Leion Tobias Mattisson Anders Lyngfelt 《Chemical Engineering Research and Design》2010
Chemical-looping combustion (CLC) is a combustion technique where the CO2 produced is inherently separated from the rest of the flue gases with a considerably low energy penalty. For this reason, CLC has emerged as one of the more attractive options to capture CO2 from fossil fuel combustion. When applying CLC with solid fuels, the use of a low cost oxygen carrier is highly important, and one such low cost oxygen carrier is the mineral ilmenite. The current work investigates the reactivity of several ilmenites, some which are synthetically produced by freeze granulation and two natural minerals, one Norwegian ilmenite and one South African ilmenite. 相似文献
18.
CO2 and O2 simultaneously reforming of coke oven gas (COG) in three processes including non-catalytic process (NCP), catalytic process (CP), and two-stage process (TSP) was investigated under two important operating conditions, CO2/CH4 and O2/CH4, over Ni-based catalyst in a fixed bed reactor. It was found that the technical indexes depend strongly on CO2/CH4 and O2/CH4 in different processes. CO2 can adjust H2/CO ratio in a wider range (0.52–3.83) in the presence of O2. The conversions of CH4 increase in overall COG reforming processes by adding O2. Also, a little O2 promotes CO2 conversions in NCP and restrains CO2 conversions in CP and TSP. The addition of O2 can also adjust H2/CO ratio of syngas, which is actually at the cost of H2 consumption by oxidation rather than reverse water gas shift (RWGS) reaction. In addition, H2 combustion in the first-stage of TSP provides heat to drive the endothermic CH4 reforming reactions and RWGS reaction in the second-stage of TSP to achieve higher CH4 and CO2 conversions. Therefore, TSP precedes significantly NCP and CP in the reforming of COG. When H2/CO ratio is 2.10, the conversions of CH4 and CO2 are 98.96 and 62.32% respectively; and, oxygen consumption is 0.13 m3 per COG m3 at gas hour space velocity 9256 h−1 in TSP. 相似文献