Topic
Substitute natural gas
About: Substitute natural gas is a research topic. Over the lifetime, 1216 publications have been published within this topic receiving 23604 citations. The topic is also known as: synthetic natural gas.
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Patent•
08 Sep 2014TL;DR: In this article, the authors proposed an approach to improve thermal efficiency in a manufacturing device for hydrogen and synthetic natural gas by using the reaction heat of the methanation reaction, which is an exothermic reaction, in the dehydrogenation reaction.
Abstract: [Problem] To improve thermal efficiency in a manufacturing device for hydrogen and synthetic natural gas. [Solution] Provided is a manufacturing device (1) for hydrogen and synthetic natural gas wherein: the manufacturing device comprises a synthetic natural gas production device (2) that produces synthetic natural gas from hydrogen and carbon dioxide through a reverse shift reaction and a methanation reaction, and a hydrogen production device (3) that produces hydrogen from a hydrogenated aromatic compound through a dehydrogenation reaction; and in order to use the reaction heat of the methanation reaction, which is an exothermic reaction, in the dehydrogenation reaction, which is an endothermic reaction, the heat is supplied to the hydrogen production device from the synthetic natural gas production device.
4 citations
Dissertation•
01 Jan 2014
TL;DR: In this paper, the authors propose a solution to solve the problem of the problem: this paper ] of unstructured data, which is also referred to as data augmentation.
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4 citations
Patent•
06 Sep 1994
TL;DR: In this paper, an apparatus for producing a substitute natural gas for city gas consisting essentially of methane by carrying out steam reforming using a fossil-based hydrocarbon as a raw material is presented.
Abstract: PURPOSE:To obtain an apparatus capable of providing a substitute natural gas at inexpensive cost of equipment by reforming a fossil-based hydrocarbon with steam at low temperature and high temperature, separating hydrogen from a gas obtained by conversion of carbon monoxide, mixing the hydrogen with low-temperature reformed gas and carrying out methanation of the mixture. CONSTITUTION:In an apparatus for producing a substitute natural gas for city gas consisting essentially of methane by carrying out steam reforming using a fossil-based hydrocarbon as a raw material, when a lean gas producing apparatus for city gas consisting of desulfurizing process (1), low-temperature reforming process (2), high- temperature reforming process (3) and carbon monoxide conversion process (4) is diverted into the apparatus for producing the substitute natural gas, PSA(Pressure Swing Adsorption) process (5) for separating hydrogen gas by treating a gas discharged from the carbon monoxide conversion process (4) is newly equipped and a methanation process (6) for receiving a mixed gas consisting of a gas obtained by partly discharging a gas output from the low-temperature reforming process (2) and hydrogen obtained from the PSA process (5) and then methanating carbon monoxide and carbon dioxide in this gas is newly equipped to provide the objective apparatus for producing the substitute natural gas, capable of installing at inexpensive cost of equipment.
4 citations
TL;DR: In this paper, the potential conversion of sugarcane into ethanol and synthetic natural gas is investigated, which consists in combining ethanol first and second generation ethanol production plant with a catalytic supercritical water gasification system.
Abstract: The present study investigates the potential conversion of sugarcane into ethanol and synthetic natural gas. The considered conversion path consists in combining ethanol first and second generation ethanol production plant with a catalytic supercritical water gasification system. The main steps of the ethanol conversion consider fermentation of sugars (1G) and enzymatic hydrolysis of bagasse (2G). Enzymatic hydrolysis is selected since it represents a promising alternative for 2nd generation biofuels due to its high conversion efficiency. Among streams that are leaving the ethanol production plant are some high watered streams, whose carbon/energy content is not negligible. These streams should be valorised in an efficient way in order to improve the energy conversion efficiency. In this context supercritical gasification process allows to valorise these flows leaving the ethanol plant. Using supercritical water gasification it is in fact possible to avoid the drying the ethanol production leftovers, thus performing a direct gasification. The conversion of ligno-cellulosic residues into synthetic natural gas is modelled considering a catalytic supercritical gasification plant. Since the goal is to achieve high energy and exergy conversion efficiencies, the potential use of an additional set of utilities, such as burners, steam injected gas turbines or steam networks, is added to the sizing problem. The mathematical nature of the optimal utility selection problem deals with mixed integer linear programming (MILP) model, in which the type and size of utilities represent the independent variables, having fixed the process size. The results of the integration are showed in terms of Composite and Grand Composite Curves, economic indicators and local CO2 balance. Finally, having identified the ratio of sugarcane that goes to second generation ethanol plant as key dependent variables, the results of a sensitivity analysis are presented. The sensitivity analysis results are shown accounting economics for the Brazilian market, energy conversion performance indicators and considering local carbon dioxide balance.
4 citations
Patent•
08 Jan 2014
TL;DR: In this article, a process of preparing synthetic natural gas by carbon black tail gas is described, and the process has the advantages that a great amount of heat is released during conversion and methanation, heat of operating units is comprehensively utilized through reasonable design, external supply of heat was not required, and byproduct high-quality steam is also produced; high-purity methane products can be produced and are processed into CNG, LNG or urban gas and can also be processed into chemical materials.
Abstract: The invention discloses a process of preparing synthetic natural gas by carbon black tail gas. After the carbon black tail gas is subjected to blowing, dust removal and CO conversion, CO and vapor in the carbon black tail gas are converted into H2 and CO2; the carbon black tail gas is then subjected to cooling dewatering, sulfur removal and pressurization, methanation is performed; methane concentration is performed to obtain the synthetic natural gas after cooling, dewatering and drying. The process has the advantages that the process of preparing the synthetic natural gas by industrial-scale carbon black tail gas is provided for the first time, and recovery of industrial emission, energy conservation, emission reduction and turning waste into wealth are achieved; the heat, vapor and sulfide in the carbon black tail gas are utilized, heating, vapor supplementing and cooling are not required, and the process is simple; a great amount of heat is released during conversion and methanation, heat of operating units is comprehensively utilized through reasonable design, external supply of heat is not required, and byproduct high-quality steam is also produced; high-purity methane products can be produced and are processed into CNG, LNG or urban gas and can also be processed into chemical materials.
4 citations