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•
24 Dec 2014
TL;DR: In this paper, a method for producing methanol and synthetic natural gas by taking coke oven gas as a raw material was proposed, which can be used for simultaneously producing methenol and liquefied natural gas, by regulating the hydrogen-carbon ratio of the gas by collecting CO2 from smoke gas.
Abstract: The invention relates to a method for producing methanol and synthetic natural gas by taking coke oven gas as a raw material. The method can be used for simultaneously producing the methanol and liquefied natural gas by regulating the hydrogen-carbon ratio of the gas by collecting CO2 from smoke gas and then carrying out methanol synthesis and methane synthesis in series. The method comprises the following steps: firstly carrying out pretreatment of removing tar, benzene, naphthalene and the like on the coke oven gas, and then adding the CO2 collected from the combusting smoke gas of a coke oven by adopting a compound amine absorption method to regulate the (H2-CO2)/(CO+CO2) of gas to 2.2-3.1; after the mixed gas is compressed, desulfurizing by virtue of an NHD method, and then carrying out hydrogenation conversion and fine desulfurization to obtain a pure qualified synthetic gas; and firstly synthesizing the pure qualified synthetic gas into methanol by virtue of a methanol synthesis catalyst, separating the generated methanol, then synthesizing into methane under the action of a methane synthesis catalyst, and deeply freezing a generated gas to obtain the liquefied natural gas with alkane content more than 94%. The process can be used for realizing resource recycling and CO2 emission reduction by recovering CO2 from the smoke gas, has the advantages of simple flow path of a production process and low operating cost and is an energy-saving and environmental-friendly production process.
5 citations
TL;DR: In this article, a group of NiO/CeO2-Cr2O3 catalysts with Ni loading was investigated for CO2 methanation in a milli-packed bed reactor.
Abstract: CO2 methanation was studied over monometallic catalyst, i.e., Ni, Fe and Co; on CeO2-Cr2O3 support. The catalysts were prepared using one-pot hydrolysis of mixed metal nitrates and ammonium carbonate. Physicochemical properties of the pre- and post-exposure catalysts were characterized by X-Ray Powder Diffraction (XRD), Hydrogen Temperature Programmed Reduction (H2-TPR), and Field Emission Scanning Electron Microscope (FE-SEM). The screening of three dopants over CeO2-Cr2O3 for CO2 methanation was conducted in a milli-packed bed reactor. Ni-based catalyst was proven to be the most effective catalyst among all. Thus, a group of NiO/CeO2-Cr2O3 catalysts with Ni loading was investigated further. 40 % NiO/CeO2-Cr2O3 exhibited the highest CO2 conversion of 97.67% and CH4 selectivity of 100% at 290 °C. The catalytic stability of NiO/CeO2-Cr2O3 was tested towards the CO2 methanation reaction over 50 h of time-on-stream experiment, showing a good stability in term of catalytic activity.
5 citations
TL;DR: The natural gas containing H2S easily forms hydrates, thermodynamic inhibitors are usually injected to pipelines in combination with the dissolved salts to ensure flow safety as mentioned in this paper. But this study measured t
Abstract: The natural gas containing H2S easily forms hydrates, thermodynamic inhibitors are usually injected to pipelines in combination with the dissolved salts to ensure flow safety. This study measured t...
5 citations
Patent•
20 Dec 1972
TL;DR: In this paper, a multi-zone plug-flow-reactor is used to produce synthetic natural gas (SNG) by thermal hydrocracking, where a vaporized hydrocarbon feed and a portion of the required hydrogen is fed downwardly through the reactor initially at 800* to 1,200*F and above 200 psig.
Abstract: A multi-zone-plug-flow-reactor is used to produce synthetic natural gas (SNG) by thermal hydrocracking. A vaporized hydrocarbon feed and a portion of the required hydrogen is fed downwardly through the reactor initially at 800* to 1,200*F and above 200 psig. The partially thermally hydrocracked hydrocarbon feed is stepwise quenched to maintain a temperature differential of 150*F maximum between each zone and the remainder of the hydrogen is mixed with the feed at various points within the reactor to complete the hydrocracking in the last zone and thereby provide a product which is quenched to a temperature at which no further hydrocracking will occur. The reactor product is cryogenically separated to provide recycle hydrogen, gas for hydrogen generation and the SNG product.
4 citations