夏季3A、5A吸附剂对奶牛舍CH_4、NH_3、CO_2及H_2S的吸附研究
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摘要
为探究夏季牛舍中3A、5A2种新型微孔吸附剂对CH_4、NH_3、CO_2和H_2S 4种有害气体的吸附效果,将2种微孔吸附剂悬挂于风机上作为试验组,用气体检测仪检测风机口处CH_4、NH_3、CO_2和H_2S含量,并与对照组相比较,其差值为吸附浓度,根据温度、湿度、大气压、风速推导计算出吸附重量。当吸附剂无吸附效果后停止试验,进行下一轮平行试验。结果表明:在36h的试验周期中,3A吸附剂吸附CH_46.08g,吸附NH_31.51g,吸附CO_2 57.91g,吸附H_2S 2.46g;5A吸附剂吸附CH_4 7.21g,吸附NH_3 1.51g,吸附CO_2 61.25g,吸附H_2S 2.06g。吸附剂不引起温度变化;随着时间的延长,吸附剂吸水性及其他性能逐渐下降;吸附质浓度增大时,吸附剂的吸附重量也相应增大;分子直径与吸附剂的通道孔径越接近,吸附剂吸附效果越明显。综合而言,3A、5A吸附剂对奶牛舍的CH_4、NH_3、CO_2和H_2S 4种气体的吸附效果基本相近。
Two novel microporous adsorbents,3A and 5A,were selected to test the adsorption of CH_4,NH_3,CO_2 and H_2S in the summer.Two kinds of microporous adsorbents were hung on the fan as two test groups.The content of CH_4,NH_3,CO_2 and H_2S in the blower port was measured with a gas detector,and the measured data was converted into mg·m-3,and the difference between them was the adsorption concentration compared with the control group,and the adsorption weight was calculated by derivation from temperature,humidity,atmospheric pressure and wind speed.The test ended when there was no adsorbent on the adsorbent,and performed the next set of parallel experiments.The result showed that 3Aadsorbent adsorbed 6.08 g CH_4,1.51 g NH_3,57.91 g CO_2 and 2.46 g H_2S,and 5A adsorbent adsorbed7.21 g CH_4,1.51 g NH_3,61.25 g CO_2 and 2.06 g H_2S.The experimental results showed that the adsorbent did not affect the change of temperature.With the increase of time,the water absorption and other properties of the adsorbent decrease gradually.As the concentration of adsorbate increased was the adsorption capacity of adsorbent increased accordingly.The closer the pore size,the more obvious the adsorption effect.
Two novel microporous adsorbents,3A and 5A,were selected to test the adsorption of CH_4,NH_3,CO_2 and H_2S in the summer.Two kinds of microporous adsorbents were hung on the fan as two test groups.The content of CH_4,NH_3,CO_2 and H_2S in the blower port was measured with a gas detector,and the measured data was converted into mg·m-3,and the difference between them was the adsorption concentration compared with the control group,and the adsorption weight was calculated by derivation from temperature,humidity,atmospheric pressure and wind speed.The test ended when there was no adsorbent on the adsorbent,and performed the next set of parallel experiments.The result showed that 3Aadsorbent adsorbed 6.08 g CH_4,1.51 g NH_3,57.91 g CO_2 and 2.46 g H_2S,and 5A adsorbent adsorbed7.21 g CH_4,1.51 g NH_3,61.25 g CO_2 and 2.06 g H_2S.The experimental results showed that the adsorbent did not affect the change of temperature.With the increase of time,the water absorption and other properties of the adsorbent decrease gradually.As the concentration of adsorbate increased was the adsorption capacity of adsorbent increased accordingly.The closer the pore size,the more obvious the adsorption effect.
引文
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[3]蒋本超,戚秀云,王鼎震.哈尔滨市阿城区地下水氨氮污染现状及成因分析研究[J].环境科学与管理,2015,40(12):116-119.
[4]李恩凯,杨在宾.反刍动物甲烷的产生、测定及减排调控的研究[J].中国草食动物科学,2014,34(5):64-68.
[5]孙永波,邢焕,栾素军,等.氨气对肉鸡健康的影响及应对措施[J].动物营养学报,2017,29(11):3870-3876.
[6]张玉铭,胡春胜,张佳宝,等.农田土壤主要温室气体(CO2、CH4、N2O)的源/汇强度及其温室效应研究进展[J].中国生态农业学报,2011,19(4):966-975.
[7]BARRER R M.Synthesis of a zeolitic mineral with chabazite-like sorptive properties[J].Journal of the Chemical Society,1948,2(6):127-132.
[8]JASRA R V,CHOUDYR N V,BHAT S G T.Effect of presorted water and temperature on adsoprtion of nitrogen and oxygen in nacaa and mgnaa zeolites[J].Candia Journal of the Chemical,1995,34:15-21.
[9]侯良忠,邵伟,郭守立,等.冬季牛舍中3种吸附剂对NH3、CO2和H2S的吸附[J].新疆农业科学,2015,52(12):2327-2334.
[10]张光圣,高宏伟,牛淑玲,等.封闭式肉牛舍的季节温度变化及对增重性能的影响[J].东北农业科学,2002,27(5):41-44.
[11]邢淑建,臧甲忠,刘伟,等.分子筛吸附剂的工业应用研究进展[J].无机盐工业,2009,41(3):13-16.
[12]史秀锋,孟瑞娟,庞先勇.A型分子筛模型及吸附的量子化学研究[J].太原理工大学学报,2009,40(1):43-46.
[13]孙健新,张玉忠,林立刚,等.4A分子筛掺杂PES膜吸附剂的制备及其对Cu2+吸附性能研究[J].天津工业大学学报,2013,32(1):5-9.
[14]赵勇,沈伟,张宏福.大气微粒、氨气和硫化氢影响动物繁殖机能和生产性能的研究进展[J].中国农业科技导报,2016,18(4):132-138.
[15]王亚男,李宏双,冯曼,等.河北省北部山区夏季奶牛舍和犊牛舍二氧化碳的检测和分析[J].中国牛业科学,2015,41(6):31-35.
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