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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DOI•
01 Jan 2012
TL;DR: Chawla et al. as mentioned in this paper presented an EPFL-thesis on bio-SNG and showed that bioSNG can be used for gasification and biomass sampling.
Abstract: Keywords: Bio-SNG ; gasification ; biomass ; sampling ; catalysis ; sulfur ; thiophene ; gas cleaning ; hydrodesulfurization ; hydrogenation ; water-gas-shift ; CoMo ; NiMo ; ruthenium ; sulfide These Ecole polytechnique federale de Lausanne EPFL, n° 5484 (2012)Programme doctoral EnergieFaculte de l'environnement naturel, architectural et construitInstitut d'ingenierie de l'environnementJury: R. Chawla (president), T.J. Schildhauer, M. Seemann, A. Wokaun Public defense: 2012-9-21 Reference doi:10.5075/epfl-thesis-5484Print copy in library catalog Record created on 2012-09-13, modified on 2016-08-09
8 citations
22 Jun 2016
TL;DR: The role of gasification for the overall substitute natural gas (SNG) process, and the basic thermodynamic aspects within gasification are discussed in this paper, where three different gasification reactor types are used at large scale: fixed bed reactors, entrained flow reactors, and fluidized bed reactors.
Abstract: Within the production of synthetic natural gas - basically methane-from solid feed stock such as coal or biomass the major conversion step is gasification, generating a product gas containing a mixture of permanent and condensable gases, as well as solid residues. The gasification step can be conducted in different atmospheres and using different reaction agents. This chapter discusses the role of gasification for the overall substitute natural gas (SNG) process, and the basic thermodynamic aspects within gasification. The gasification process is a series of different conversions involving both homogeneous and heterogeneous reactions. The basic steps from solid fuel to product gas are drying, pyrolysis, and gasification. From a technological viewpoint, there basically exist three different gasification reactor types that are used at large scale: fixed bed reactors, entrained flow reactors, and fluidized bed reactors. Coal is mainly used in entrained flow gasification or fixed bed units, whereas biomass gasification is mostly done in fluidized bed reactors. © 2016 by John Wiley & Sons, Inc. All rights reserved.
8 citations
Patent•
22 Dec 2010
TL;DR: In this article, a process for preparing synthetic natural gas from coke oven gas is described, which is characterized in that the coke-oven gas is subjected to precleaning, sulfur tolerant methanation, advanced purification, methane synthetic reaction, natural gas separation and the like so as to prepare CH4-rich natural gas and hydrogen-rich gas.
Abstract: The invention provides a process for preparing synthetic natural gas from coke oven gas, which is characterized in that: the coke oven gas is subjected to precleaning, sulfur tolerant methanation, advanced purification, methane synthetic reaction, natural gas separation and the like so as to prepare CH4-rich natural gas and hydrogen-rich gas, wherein methane synthetic reaction, organic sulfur conversion reaction, olefin hydrogenation saturation, deoxidization and the like are performed simultaneously in a sulfur tolerant methanation reactor between a precleaning section and an advanced purification section, so that the purification process can be saved and heat loss due to repeated temperature rise and reduction in the purification process is avoided; meanwhile, quantity of gas treated by an acidic gas purification system after the sulfur tolerant methanation is reduced, energy consumption and investment are reduced; and parts of CO and CO2 in the coke oven gas are converted in the sulfur tolerant methanation reaction, so that the load of a methane synthesis reactor can be reduced and the rest CO and CO2 in the coke oven gas can be completely reacted after a period of methane synthetic reaction.
8 citations
Patent•
25 Mar 2009
TL;DR: In this article, a method for synthesizing methane by utilizing oven gas is presented, where the main steps of purifying to remove impurities, compressing to exchange heat, adding water vapor, first stage of methanation reaction, second stage of meta-henceforth, third stage of mithane reaction, PSA methane separation and the like.
Abstract: The invention discloses a method for synthesizing methane by utilizing oven gas. Product gas with methane concentration of more than 90 percent is obtained through the main steps of purifying to remove impurities, compressing to exchange heat, adding water vapor, first stage of methanation reaction, second stage of methanation reaction, third stage of methanation reaction, PSA methane separation and the like. By adopting the method and utilizing the oven gas as raw materials, synthetic natural gas with high content of methane, low content of impurities and high heating value can be obtained, which is favorable to protecting the environment, saving energy and developing new energy; in addition, in the method, the addition of appropriate water vapor in the raw materials of oven gas before the fist sage of reaction properly inhibits the depth of the methanation reaction, reduces the heat amount released in the whole reaction process, conduces the cooling of the gas after the reaction and prevents the occurrence of carbon deposition reaction to devitalize the activity of a catalyst, thus being beneficial to the continuous normal operation of the whole synthesizing process.
8 citations
Patent•
23 Apr 2014
TL;DR: In this article, the authors proposed a method of producing substitute natural gas from synthesis gas, mainly solving problems, namely large using amount of recycle gas, high energy consumption of compressors and short service lifetime of catalysts, of high-temperature methanation reactions in the prior art.
Abstract: The invention relates to a method of producing substitute natural gas from synthesis gas, mainly solving problems, namely large using amount of recycle gas, high energy consumption of compressors and short service lifetime of catalysts, of high-temperature methanation reactions in the prior art. According to the technical scheme adopted by the method, the method comprises: a) a step of providing a high-temperature methanation reaction zone including n-stage series-connected reactors, wherein the n is not less than 2, each reactor is divided into m sections of catalyst layers and the m is not less than 2; b) a step of dividing the synthesis gas raw materials into n sections and respectively feeding the n sections of the synthesis gas raw materials into inlets of the reactors at all stages in the high-temperature methanation reaction zone, wherein each section of the synthesis gas raw materials that enters a reactor is then divided into m streams and the m streams respectively enter the corresponding catalyst layers; c) a step of allowing a stream flowing out of an outlet of each of the reactors except the reactor at the final stage to enter the first section of catalyst layer in the reactor at the next stage; and d) a step of shunting the stream Vn flowing out from the reactor at the final stage to obtain a part Vn', and circulating the stream Vn' after the Vn' is condensed to the inlet of the reactor at the first stage. By the technical scheme, the problems are solved well and the method can be used in industrial production of substitute natural gas from synthesis gas.
8 citations