پديد آورنده :
اسماعيلي فرج، حميد
عنوان :
بررسي فرآيند حذف سولفيد هيدروژن از بيو گاز با فرآيند بيواسكرابينگ با استفاده از نانو سيال
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
ده، 134ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
محسن نصر اصفهاني
استاد مشاور :
نسرين اعتصامي
توصيفگر ها :
بيوفيلتراسيون , بيو اسكرابر
استاد داور :
فواد آقاميري، احمد محب، نوراله ميرغفاري
تاريخ ورود اطلاعات :
1395/11/03
رشته تحصيلي :
مهندسي شيمي
كد ايرانداك :
ID973 دكتري
چكيده انگليسي :
AbstractBiogas has attracted interest as an important source of renewable energy in recent years Biogas isproduced from anaerobic digestion of organic materials by microorganisms Biogas contains about60 percent methane and 40 percent carbon dioxide and some other impurities such as hydrogensulfide ammonia nitrogen H2S with 10 ppmv to 10000 ppmv is the main impurity in biogas andmust be removed due to downstream corrosion of facilities and its toxicity In this Thesis bioscrubber as a biological method was investigated for removal of H2S from biogas To achievethis task a bubble absorption tower was used to absorb H2S from the gas stream into water ornanofluids The absorbed H2S was then treated in a suspended growth bioreactor containingactivated sludge Silica water nanofluid and graphene oxide water nanofluid were used as absorbentin this work The results of laboratory tests showed that both silica water nanofluid with particleloading of 0 1 wt SS 100 and graphene oxide water nanofluid with particle loading of 0 02 wt EGO 020 were capable of absorbing H2S 40 more than that of the base fluid BF The resultsof selectivity test showed that nanofluid EGO 020 absorbed H2S selectively while SS 100nanofluid absorbed both H2S and CO2 It was concluded that the main mechanism for enhancementof mass transfer by nanofluids was the grazing effect Grazing effect is defined by adsorption of gasmolecules on the nanoparticle surface in the gas liquid interface and transportion of the gasmolecules into the bulk liquid by particles This take place due to intermolecular forces between gasmolecules and functional groups on the nanoparticle surfaces Effective diffusivity coeficients ofH2S in SS 100 and EGO 020 nanofluids were 2 9 10 9 and 2 75 10 9 m2 s respectively Thesevalues are 52 and 44 percent more than that of the base fluid 1 9 10 9 m2 s respectively Theincrease in effective diffusivity is due to the grazing in nanofluids EGO 020 nanofluid showedbetter performance in absorption of H2S in laboratory scale In the next stage biogas produced inthe North Isfahan Waste Water Treatment Plant located in Doulatabad Isfahan was treated in a pilotscale bioscrubber The base fluid and SS 100 and EGO 020 nanofluids were applied as absorbents Results of pilot tests showed that for input biogas flow rate of 7 LPM the absorbents BF SS 100and EGO 020 eliminated 39 61 and 55 percent of the hydrogen sulphide content in the inlet biogasfor retention time of 27 seconds while for the input biogas flow of 15 LPM retention time of 12seconds respectively 23 52 and 52 percent of H2S in the biogas was eliminated Longe timebioscrubber performance was studied for all absorbents and results showed that Removal Efficiency RE for base fluid SS 100 and EGO 020 nanofluids during 31 20 and 20 days eliminated 98 97and 86 percent of H2S respectively Presence of SS and EGO nanoparticles with 0 1 and 0 02 wt respectively showed no harm to the microorganism performance Nanofluids investigated in thiswork may apply as effective absorbents in bioscrubbers
استاد راهنما :
محسن نصر اصفهاني
استاد مشاور :
نسرين اعتصامي
استاد داور :
فواد آقاميري، احمد محب، نوراله ميرغفاري
