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改进一步法制备Cu/SAPO-34/堇青石催化剂及其脱硝效率

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白鹏飞, 吴撼明, 王夫美, 沈伯雄. 改进一步法制备Cu/SAPO-34/堇青石催化剂及其脱硝效率[J]. 环境工程学报, 2018, 12(11): 3161-3168. doi: 10.12030/j.cjee.201807001
引用本文: 白鹏飞, 吴撼明, 王夫美, 沈伯雄. 改进一步法制备Cu/SAPO-34/堇青石催化剂及其脱硝效率[J]. 环境工程学报, 2018, 12(11): 3161-3168. doi: 10.12030/j.cjee.201807001
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BAI Pengfei, WU Hanming, WANG Fumei, SHEN Boxiong. Preparation of Cu/SAPO-34/cordierite catalyst by improved one-step method and its denitration efficiency[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3161-3168. doi: 10.12030/j.cjee.201807001
Citation: BAI Pengfei, WU Hanming, WANG Fumei, SHEN Boxiong. Preparation of Cu/SAPO-34/cordierite catalyst by improved one-step method and its denitration efficiency[J]. Chinese Journal of Environmental Engineering, 2018, 12(11): 3161-3168. doi: 10.12030/j.cjee.201807001
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改进一步法制备Cu/SAPO-34/堇青石催化剂及其脱硝效率

  • 1.

    河北工业大学能源与环境工程学院，天津300401

  • 2.

    中国汽车技术研究中心有限公司，天津 3004300

  • 基金项目:

    科技部重点研发专项资助（2018YFB0605101，2018YFB0605100）

    天津市自然科学基金重点资助项目（18JCZDJC39800）

Preparation of Cu/SAPO-34/cordierite catalyst by improved one-step method and its denitration efficiency

  • 1.

    School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China

  • 2.

    China Automotive Technology and Research Center , Tianjin300300, China

  • Fund Project:

  • 摘要: 采用改进一步法制备堇青石整体式Cu/SAPO-34分子筛催化剂，考察了涂覆工艺中黏结剂和分散剂对整体式催化剂性能的影响，以求获得最优添加剂量以达到较高整体式催化剂脱硝效率。研究结果表明，相比于传统一步法，改进一步法工艺简单，涂层更均匀。黏结剂的加入明显提高涂层强度，其中铝溶胶效果最好。铝溶胶降低催化剂活性，酸性硅溶胶提高催化剂低温活性，碱性硅溶胶提高催化剂高温活性。分散剂提高了催化剂涂层强度和脱硝效率。添加17%酸性硅溶胶量所制备的Cu/SAPO-34催化剂具有最好的NO转化率，在30 000 h-1空速下，NO转化效率在90%以上的温度窗口为200~425 ℃，起燃温度为150 ℃，且具有较好的涂层强度。实验结果证明改进一步法脱硝效果较好，且工艺简单节省能源，可以为整体式催化剂的生产制备工艺提供参考。
    Abstract: A cordierite monolithic Cu/SAPO-34 molecular sieve catalyst was prepared by an improved one-step method. The effects of binder and dispersant used in the coating process on the performance of the monolith catalyst were studied to determine the optimum additive amount for the high overall catalyst denitration efficiency. The results show that the improved one-step method is simpler with more uniform coating than the traditional one-step method. The binder addition significantly promoted the coating strength, and aluminum sol showed the best effects. Aluminum sol reduced the catalyst activity, acidic silica sol raised the catalyst activity at low temperature, and alkaline silica sol enhanced the catalyst activity at high temperature. The dispersant promoted the strength of the catalyst coating and the denitration efficiency. The Cu/SAPO-34 catalyst with addition of 17% acid silica sol presented the best conversion rate for NO. At 30 000 h-1 space velocity, the temperature window for above 90% NO conversion efficiency was 200~425 °C, the light-off temperature was 150 °C, a good coating strength was observed for this catalyst. The above experimental results proved that the improved one-step method had a good denitration performance, simple preparation and energy saving effect, which could provide a reference for the industrial preparation of the diesel monolithic catalysts.
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  • [1] GRANGER P, PARVULESCU V I.Catalytic NOx abatement systems for mobile sources: From three-way to lean burn after-treatment technologies[J].Chemical Reviews,2011, 111(5):3155-3207
    [2] MA Z,WU X D,FENG Y, et al.Low-temperature SCR activity and SO2 deactivation mechanism of Ce-modified V2O5–WO3/TiO2 catalyst[J]．Materials International,2015,25(4): 342–352 10.1016/j.pnsc.2015.07.002
    [3] ZHAO X,HUANG L,Li H R,et al.Highly dispersed V2O5/TiO2 modified with transition metals (Cu,Fe,Mn,Co) as efficient catalysts for the selective reduction of NO with NH3[J]．Chinese Journal of Catalysis,2015,36(11):1886–1899 10.1016/S1872-2067(15)60958-5
    [4] DEVADAS M, KR?CHER O, ELSENER M.Characterization and catalytic investigation of Fe-ZSM5 for urea-SCR[J].Catalysis Today 2007,119(1): 137-144 10.1016/j.cattod.2006.08.018
    [5] GROSSALE A, NOVA I, TRONCONI E.Study of a Fe–zeolite-based system as NH3-SCR catalyst for diesel exhaust after treatment[J].Catalysis Today,2008, 136(1):18-27 10.1016/j.cattod.2007.10.117
    [6] BAIK J H, YIM S D, NAM I S, et al.Control of NOx emissions from diesel engine by selective catalytic reduction (SCR) with urea[J].Topics in Catalysis, 2004, 30-31(1/2/3/4):37-41
    [7] XUE J J, WANG X Q, QI G S, et al.Characterization of copper species over Cu/SAPO-34 in selective catalytic reduction of NOx with ammonia: Relationships between active Cu sites and de-NOx performance at low temperature[J].Journal of Catalysis, 2013, 297(1):56-64
    [8] MARTíNEZ-FRANCO R, MOLINER M, FRANCH C, et al.Rational direct synthesis methodology of very active and hydrothermally stable Cu-SAPO-34 molecular sieves for the SCR of NOx[J].Applied Catalysis B: Environmental, 2012, 127(17):273-280 10.1016/j.apcatb.2012.08.034
    [9] LI J H, CHANG H Z, MA L, et al.Low-temperature selective catalytic reduction of NOx with NH3 over metal oxide and zeolite catalysts: A review[J].Catalysis Today,2011,175(1):147-156
    [10] 唐韬,赵彦光,华伦,等.Cu-Fe复合沸石型SCR催化剂在重型柴油机上的应用研究[J]. 内燃机工程,2015,36(6):79-83
    [11] 郭学华,李英霞,陈健,等.蜂窝状整体式分子筛催化剂制备研究进展[J].环境科学与技术,2014,37(5):70-74
    [12] 曹群海,铈钨系SCR催化剂制备及涂覆方法研究[D].上海：上海交通大学,2014
    [13] 董文杰.NH3-SCR催化剂配方和蜂窝载体涂覆工艺研究[D].上海：上海交通大学,2013
    [14] LI F K, SHEN B X, TIAN L H, et al.Enhancement of SCR activity and mechanical stability on cordierite supported V2O5-WO3/TiO2 catalyst by substrate acid pretreatment and addition of silica [J].Powder Technology, 2016, 297:384-391 10.1016/j.powtec.2016.04.050
    [15] 曹群海,林赫,管斌,等.TiCe0.2W0.2Ox型SCR催化剂涂覆方法研究[J]. 内燃机工程,2016,37(6): 86-92
    [16] LEISTNER K, OLSSON L.Deactivation of Cu/SAPO-34 during low-temperature NH3-SCR[J].Applied Catalysis B: Environmental, 2015, 165:192-199 10.1016/j.apcatb.2014.09.067
    [17] 孔令涛, 沈本贤, 蒋章. 硅含量对氯甲烷制取低碳烯烃的SAPO-34分子筛酸性的影响[J]. 化工进展, 2015, 34(2):413-418
    [18] MANE R B, GHALWADKAR A A, HENGNE A M, et al.Role of promoters in copper chromite catalysts for hydrogenolysis of glycerol[J].Catalysis Today, 2011, 164(1):447-450 10.1016/j.cattod.2010.10.032
    [19] SZANYI J, OH S H, HEO I, et al.Improved thermal stability of a copper-containing ceria-based catalyst for low temperature CO oxidation under simulated diesel exhaust conditions[J].Catalysis Science & Technology, 2018, 8(5)：1383-1394
    [20] 范得权. 一步法合成Cu/SAPO-34催化剂SCR活性,水热稳定性以及涂覆工艺研究[D]. 天津：天津大学, 2016
    [21] 李凯,蜂窝状Mn-Ce/Ti/CC脱硝催化剂的涂覆技术及性能研究[D]. 太原：太原理工大学,2013
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  • 刊出日期:  2018-11-12

改进一步法制备Cu/SAPO-34/堇青石催化剂及其脱硝效率

  • 1. 河北工业大学能源与环境工程学院，天津300401
  • 2. 中国汽车技术研究中心有限公司，天津 3004300
基金项目:

科技部重点研发专项资助（2018YFB0605101，2018YFB0605100）

天津市自然科学基金重点资助项目（18JCZDJC39800）

摘要: 采用改进一步法制备堇青石整体式Cu/SAPO-34分子筛催化剂，考察了涂覆工艺中黏结剂和分散剂对整体式催化剂性能的影响，以求获得最优添加剂量以达到较高整体式催化剂脱硝效率。研究结果表明，相比于传统一步法，改进一步法工艺简单，涂层更均匀。黏结剂的加入明显提高涂层强度，其中铝溶胶效果最好。铝溶胶降低催化剂活性，酸性硅溶胶提高催化剂低温活性，碱性硅溶胶提高催化剂高温活性。分散剂提高了催化剂涂层强度和脱硝效率。添加17%酸性硅溶胶量所制备的Cu/SAPO-34催化剂具有最好的NO转化率，在30 000 h-1空速下，NO转化效率在90%以上的温度窗口为200~425 ℃，起燃温度为150 ℃，且具有较好的涂层强度。实验结果证明改进一步法脱硝效果较好，且工艺简单节省能源，可以为整体式催化剂的生产制备工艺提供参考。

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