A Study On Adsorption （Absorption） Performance Of4Kinds Of Adsorbents （Absorbers） Adsorbing （absorbing） CH₄, CO₂and NH₃in A Cowshed In Different Seasons

Reduce carbon, nitrogen emissions have become a hot topic world, it has been sounded alarmbecause of the sharp rise in carbon emissions brought the global climate, ecological, economic and otherissues for humanity, while a part of CH₄, CO₂and NH₃emissions come from animals. It has beengradually pay attention to this issue and a lot of tests carried out to reduce the emissions of these gases,for example, through the control of ruminant intake, dietary forage ratio, add methane inhibitors, addingenzyme andsynthesis of amino acids, etc., but these endogenous emission reduction method has certaindisadvantages, some higher cost, some poor role or animal produce tolerance, and even some additivesmay reduce the production performance of animals or bring some side effects, so find a new, exogenousway to reduce emissions is imminent. In this study, use GY-1, GY-2, GY-3and GY-4as adsorbents（absorbers） to adsorb （absorb） the gas through exogenous, and the four-stage test of the spring, summer,autumn and winter, compared CH₄, CO₂and NH₃concentration before and after adsorb （absorb）, obtainsatisfactory results.Experiment â…  In a cowshed evenly spread sprinkle10kg （8m²ï¼‰ adsorbent GY-1, use portable gasdetectors continuous8h to measure the concentration changes of CH₄, CO₂and NH₃in each season,comparison with controlled trials which was no adsorbent. The results show that:10kg GY-1adsorbed8h can be very significantly reduced （P<0.01） CH₄, CO₂and NH₃concentration in cowshed in allseasons.1kg GY-18h can adsorb CH₄12.69g,10.52g,16.12g and20.28g, can absorb CO₂40.41g,35.96g,51.29g and56.67g, can adsorb NH₃1.98g,2.86g,1.01g and0.64g respectively in spring,summer, autumn and winter. The CH₄, CO₂adsorption total amount was a significant negativecorrelation （P<0.05） with the average room temperature between seasons; the CH₄, CO₂and NH₃adsorption total amount was no correlation （P>0.05） with the average relative humidity between seasons;when the room temperature is constant, the adsorption total amount increased greatly with increasingNH₃average concentration between seasons; when the NH₃concentration is constant, NH₃adsorptiontotal amount increased a little with increasing temperature between seasons; the NH₃averageconcentration between seasons impact adsorption total amount is higher than the average roomtemperature between seasons; the CH₄, CO₂and NH₃adsorption amount decreases rapidly as theadsorption time increases.Experiment â…¡ In the cowshed evenly placed10L absorber GY-2, use portable gas detectorscontinuous8h to measure the concentration changes of NH₃, CH₄and CO₂in each season, comparison with controlled trials which was no absorber and comparison with pure water absorption experiment. Theresults show that:10L GY-2absorbed8h can be very significantly reduced （P<0.01） NH₃averageconcentration in cowshed in all seasons, NH₃average concentration in cowshed is lower than pure waterabsorption experiment group in all seasons, wherein the NH₃average concentration was significantlylower than pure water absorption experiment group in summer （P<0.05）.1L GY-28h can absorb NH₃1.57g,2.62g,1.16g and0.85g respectively in spring, summer, autumn and winter. When the roomtemperature is constant, the absorption amount increased greatly with increasing NH₃concentration;when the NH₃concentration is constant, absorption amount increased a little with increasingtemperature.Experiment â…¢ In the cowshed evenly spread sprinkle10kg（8m²ï¼‰ adsorbent GY-3, use portablegas detectors continuous8h to measure the concentration changes of NH₃, CH₄, CO₂in each season,comparison with controlled trials which was no adsorbent. The results show that:10kg GY-3adsorbed8h can be very significantly reduced （P<0.01） NH₃concentration in cowshed in all seasons.1kg GY-38hcan adsorb NH₃1.43g,2.26g,0.87g and0.55g respectively in spring, summer, autumn and winter.Adsorption amount increases with increasing initial concentration between seasons, decreases rapidly asthe adsorption time increases, the concentration impact adsorption amount is higher than the temperatureimpact adsorption amount. Adsorbent GY-3for CH₄and CO₂is no significant adsorption （P>0.05）.Experiment â…£ In the cowshed evenly placed62.5L（10mol/L） absorber GY-4, use portable gasdetectors continuous8h to measure the concentration changes of CO₂, NH₃, CH₄in each season,comparison with controlled trials which was no absorbent. The results show that:62.5L（10mol/L） GY-4absorbed8h can be very significantly reduced （P<0.01） CO₂and NH₃average concentration in cowshedin all seasons.62.5L（10mol/L） GY-48h can absorb CO₂2466.5g,2581.5g,2265.1g and2197.4grespectively in spring, summer, autumn and winter, can absorb NH₃8.98g,10.30g,5.80g and4.05grespectively in those seasons. CO₂absorption amount increases with increasing CO₂averageconcentration of each hour in the same season and average room temperature between seasons. NH₃absorption total amount increases with increasing NH₃average concentration between seasons, NH₃absorption amount of each hour increases with increasing NH₃average concentration of each hour insummer, due to low winter temperatures, solubility increases, NH₃absorption amount of each hour andNH₃average concentration of each hour have no significant correlation in winter （P>0.05）. GY-4forCH₄is no significant absorption （P>0.05）.The study found that adsorbent GY-1both in the types of gas adsorption or in the amount ofgreenhouse gas adsorption has a strong advantage, absorber GY-4overall absorption performance rankedsecond, while the GY-2the NH₃absorption amount is higher, the adsorption properties of the adsorbentGY-3is more general.