南京师范大学学报：工程技术版
南京師範大學學報：工程技術版
남경사범대학학보：공정기술판
Journal of Nanjing Nor Univ: Eng and Technol
2012年
2期
36-42
,共7页
生物质%热解%热解焦%汞%吸附特性
生物質%熱解%熱解焦%汞%吸附特性
생물질%열해%열해초%홍%흡부특성
biomass%pyrolysis%biomass-pyrolysis char%mercury%adsorption characteristics
以桑树枝、核桃壳、麦秆和稻秆4种生物质为原料，利用固定床热解实验台制备不同的生物质热解焦，采用比表面积与孔隙度分析仪测量了生物质热解焦的比表面积及其孔隙结构参数．利用固定床吸附实验装置，研究了生物质种类、热解温度、吸附温度及汞初始浓度等因素对模拟烟气中汞吸附性能的影响．结果表明：（1）在相同的热解和吸附条件下，核桃壳热解焦的吸附效果最好，其次是桑树枝热解焦和麦秆热解焦，稻秆热解焦的吸附效果最差；（2）在热解温度为400％～800％范围内，600℃热解温度下所得生物质热解焦的吸附效果最好，400℃热解焦吸附效果最差；（3）在吸附温度为60℃～120℃的实验范围内，随着吸附温度的升高，单位生物质热解焦汞吸附量明显降低；（4）在汞初始浓度13．5～38．1μg／nl。范围内，随着汞初始浓度的增加，单位生物质热解焦汞吸附量有所减小．
以桑樹枝、覈桃殼、麥稈和稻稈4種生物質為原料，利用固定床熱解實驗檯製備不同的生物質熱解焦，採用比錶麵積與孔隙度分析儀測量瞭生物質熱解焦的比錶麵積及其孔隙結構參數．利用固定床吸附實驗裝置，研究瞭生物質種類、熱解溫度、吸附溫度及汞初始濃度等因素對模擬煙氣中汞吸附性能的影響．結果錶明：（1）在相同的熱解和吸附條件下，覈桃殼熱解焦的吸附效果最好，其次是桑樹枝熱解焦和麥稈熱解焦，稻稈熱解焦的吸附效果最差；（2）在熱解溫度為400％～800％範圍內，600℃熱解溫度下所得生物質熱解焦的吸附效果最好，400℃熱解焦吸附效果最差；（3）在吸附溫度為60℃～120℃的實驗範圍內，隨著吸附溫度的升高，單位生物質熱解焦汞吸附量明顯降低；（4）在汞初始濃度13．5～38．1μg／nl。範圍內，隨著汞初始濃度的增加，單位生物質熱解焦汞吸附量有所減小．
이상수지、핵도각、맥간화도간4충생물질위원료，이용고정상열해실험태제비불동적생물질열해초，채용비표면적여공극도분석의측량료생물질열해초적비표면적급기공극결구삼수．이용고정상흡부실험장치，연구료생물질충류、열해온도、흡부온도급홍초시농도등인소대모의연기중홍흡부성능적영향．결과표명：（1）재상동적열해화흡부조건하，핵도각열해초적흡부효과최호，기차시상수지열해초화맥간열해초，도간열해초적흡부효과최차；（2）재열해온도위400％～800％범위내，600℃열해온도하소득생물질열해초적흡부효과최호，400℃열해초흡부효과최차；（3）재흡부온도위60℃～120℃적실험범위내，수착흡부온도적승고，단위생물질열해초홍흡부량명현강저；（4）재홍초시농도13．5～38．1μg／nl。범위내，수착홍초시농도적증가，단위생물질열해초홍흡부량유소감소．
Different kinds of biomass-pyrolysis chars were prepared from four kinds of biomass named mulberry twig （MT） , nut shell （NS） , wheat straw （WS） , and rice husk （RH） in a fixed-bed pyrolysis reactor. The specific surface areas and pore structure parameters were measured by a surface area analyzer. The mercury adsorption characteristics of the biomass-pyrolysis chars were carried out in a fixed-bed adsorption reactor. The effects of biomass type, pyrolysis temperature, adsorption temperature and initial mercury concentration on mercury adsorption characteristics were investigated. The results indicated that： （ 1 ） At the same conditions of pyrolysis and adsorption reaction, the adsorption char- acteristics of NS char were the best, MT char and WS chars were in middle, and RS char was the worst. （2） At the py- rolysis temperatures of 400℃- 600℃, biomass chars pyrolyzed at 600℃ showed the best adsorption characteristics, and biomass chars pyrolyzed at 400℃ performed the worst adsorption characteristics. （ 3 ） The unit mercury adsorption capacity of biomass-pyrolysis chars decreased with increasing the adsorption temperature significantly at the adsorption temperature of 60℃-120℃. （4） The unit adsorption capacity of biomass-pyrolysis chars decreased slightly with increasing initial mercury concentration at the initial mercury concentration of 13.5 μg/m3 - 38.1 μg/m3.
