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.

Ultrafine desulfurization agent and preparation method thereof

Abstract: The invention discloses an ultrafine desulfurization agent used in raw gas purification of synthetic natural gas. The ultrafine desulfurization agent comprises a carrier, an active component, and an auxiliary agent. The carrier is a mixture of alumina and zirconia. The active component is copper oxide and zinc oxide. The auxiliary agent is chromium oxide or manganese oxide. The preparation method comprises the steps that: copper, zinc, aluminum, zirconium and a nitrate solution of chromium or manganese are subjected to co-precipitation with a precipitating agent of an alkali solution. The obtained precipitate is washed, dried, calcined, and compression-molded. Compared with prior art, the agent and the method have the advantages that: (1) the application temperature is low, and the desulfurization agent can be directly used as a desulfurization protection agent of a methanation catalyst used in a natural gas production process by using gas/coke oven gas; (2) the agent can be used in ultrafine removing of thiophene in raw gas, wherein a thiophene content in the raw gas after purification is lower than 20ppb; (3) the Al2O3/ZrO2 composite carrier is adopted, such that mechanical strength is high, stability is high, and desulfurization activity is high; and (4) the preparation method is simple, and is suitable for large-scale industrialization application.

Preparation and catalytic performance of an efficient Raney nickel catalyst for syngas methanation

Abstract: A new strategy for preparing Raney nickel catalyst was proposed, which could significantly improve the catalytic activity of the catalyst in the methanation of syngas to substitute natural gas in a continuous flow microreactor. The new preparation strategy includes a hydrochloric acid solution quenching process interpolated between two alkali leaching steps. Raney Ni III catalyst showed the best activity with a CO conversion of almost 100% and a CH4 selectivity of 98% at 548 K under 1.0 MPa with the molar ratio of 3H2:1CO and a gas hourly space velocity of 10000 h−1. The catalysts were characterized by N2 adsorption–desorption, scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy and temperature-programmed desorption of hydrogen. The results of systematic characterization and catalytic activity evaluation show that the formation of 3Ni(OH)2·2H2O in the catalyst is beneficial to the adsorption and activation of hydrogen and the C=O bond, which greatly improves the activity of Raney nickel III in methanation of syngas. Meanwhile, high specific surface area leads to more active sites on the catalyst surface, which is also conducive to the improvement in catalyst activity.

Technical development on synthetic natural gas production from biomass (Bio-SNG)

Abstract: The production of synthetic natural gas from biomass(Bio-SNG) by gasification is an attractive option to reduce CO2 emissions and replace declining fossil natural gas reserves.Bio-SNG via gasification,cleaning,conditioning,methanation of the synthesis gas,and subsequent upgrading can be regarded as a ‘second generation’ renewable energy technology.According to the comprehensive analysis on synthetic technique of Bio-SNG,the process flowsheet abroad are analyzed and compared.Some suggestions are provided on development and applications of Bio-SNG technologies.

Biomass gasification in the Netherlands

Abstract: This reports summarizes the activities, industries, and plants on biomass gasification in the Netherlands, see also Figure below. Most of the initiatives somehow relate to waste streams, rather than clean biomass, which may seem logic for a densely populated country as the Netherlands. Furthermore, there is an increasing interest for the production of SNG (Substitute Natural Gas) from biomass, both from governments and industry.