نتایج جستجو برای: ch4 purification
تعداد نتایج: 63718 فیلتر نتایج به سال:
mil-53-cu has been synthesized hydrothermally and has been used for the first time for gas separation. mil-53-cu shows adsorption capacities of 8.1, 0.7 and 0.5 m.mol/g, respectively, for ch4, co2 and h2 at 30 bar and 298 k. the high ch4 adsorption capacity of mil-53-cu maybe attributed to the high pore volume and large number of open metal sites. the high selectivity for ch4 over co2 (11.5) an...
Lakes are important components of the global methane (CH4) cycle. In seasonally ice-covered lakes, CH4 transported by ebullition (bubbling) from anoxic sediments gets trapped at the water-ice interface. If not oxidized by methane-oxidizing bacteria (MOB), this can potentially lead to high episodic CH4 emissions at icemelt. To understand the fate of CH4 trapped below ice, we measured depth-distr...
This paper presents a tool for the analysis of conversion of organic waste into energy. The tool is a program that uses waste characterization parameters and mass flow rates at each stage of the waste treatment process to predict the given products. The specific waste treatment process analysed in this paper is anaerobic digestion. The different waste treatment stages of the anaerobic digestion...
background: iran is located in the seventh rank in terms of co2 emissions resulting from the fuel combustion in the world. gas compressor booster stations, due to the several sources of contaminants, are causing the release of large amounts of co2 and ch4, which will cause climate change therefore, estimating the emissions of the gases from oil and gas, different processing units are necessary....
The goal of this review was to analyze published data related to mitigation of enteric methane (CH4) emissions from ruminant animals to document the most effective and sustainable strategies. Increasing forage digestibility and digestible forage intake was one of the major recommended CH4 mitigation practices. Although responses vary, CH4 emissions can be reduced when corn silage replaces grass...
افزایش غلظت و انتشار گازهای گلخانه ای در اتمسفر به فعالیت های انسانی نسبت داده شده است. از جمله این فعالیت ها انتخاب نامناسب روش های خاک ورزی، کاشت و آبیاری است. با توجه به بحران آب در چند سال اخیر، مدیریت خاک ورزی و آبیاری باید به سمت کاهش بهم خوردن خاک و کاهش نفوذ عمقی آب در سیستم های تولید محصولات کشاورزی باشد. جهت بررسی تاثیر خاک ورزی و روش های آبیاری بر میزان تصاعد گازهای گلخانه ای در کشت ...
[1] Airborne measurements of methane (CH4) and carbon dioxide (CO2) were taken over the rice growing region of California’s Sacramento Valley in the late spring of 2010 and 2011. From these and ancillary measurements, we show that CH4 mixing ratios were higher in the planetary boundary layer above the Sacramento Valley during the rice growing season than they were before it, which we attribute ...
Methane (CH4) emissions from ruminants should be accounted for the natural grazed rangeland ecosystems when devising greenhouse gas budget inventory, in particular, their contribution to global warming. In this study, CH4 emission from sheep respiration at different grazing intensities (light grazing, 0.75 sheep/ha, LG; moderate grazing, 1.50 sheep/ha, MG; and heavy grazing, 2.25 sheep/ha, HG) ...
Globally, the methane (CH4) efflux from the ocean to the atmosphere is small, despite high rates of CH4 production in continental shelf and slope environments. This low efflux results from the biological removal of CH4 through anaerobic oxidation with sulfate in marine sediments. In some settings, however, pore water CH4 is found throughout the sulfate-bearing zone, indicating an apparently ine...
[1] Spaceborne measurements by the Atmospheric Infrared Sounder (AIRS) on the EOS/ Aqua satellite provide a global view of the methane (CH4) distribution in the mid‐upper troposphere (MUT‐CH4). The focus of this study is to examine the spatiotemporal variation of MUT‐CH4 in the high Northern Hemisphere (HNH) using AIRS retrievals, aircraft measurements, and simulations from a forward chemistry‐...
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