CN115155628A - 一种炭基脱硫催化剂及制备方法和应用 - Google Patents
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Abstract
本发明公开了一种炭基脱硫催化剂及制备方法和应用。该催化剂包括活性组分、载体和功能助剂,所述的活性组分为铜、钴和镨复合氧化物,所述的载体为硫磷共掺杂活性炭,所述的功能助剂为氟掺杂棒状二氧化铈纳米粒子。本发明制备的催化剂能够在较低温度环境下,将烟气中二氧化硫氧化成三氧化硫并吸附,催化剂具有优异的氧化性、选择性和吸附性。
Description
技术领域
本发明涉及环保催化材料技术领域,特别涉及一种炭基脱硫催化剂及制备方法和应用。
背景技术
SO2是造成大气污染的主要污染物之一,有效控制工业烟气中SO2是当前刻不容缓的环保课题。目前,主流的脱硫工艺包括湿法脱硫(钙法、氨法等),干法脱硫(SDS小苏打脱硫)和半干法脱硫(SDA旋转雾化器脱硫)等,烟气中的SO2与加入的脱硫剂反应,生成固体废弃物,但生成的固废体量大,难以处理。而针对活性炭,有工艺采用活性炭吸附烟气中SO2和NOx,通过离线再生,分离SO2和NOx,成本高,效果不佳。
目前,现有技术中公开了一种发明,申请号为CN201910674311.9,名称为一种氮磷硫共掺杂活性炭及其制备,低温条件下,植物原料浸渍于碱/硫脲溶液,与溶剂小分子发生作用,纤维素链被破坏,并溶解。同时,硫脲和氮磷有机化合物与植物原料中的酚羟基、甲氧基等活性基团发生化学交联,形成新的交联产物,促进杂原子的固定;交联产物与植物原料形成活性炭的骨架结构,提高了活性炭的比表面积;高温条件下,碱作为活化剂,进行刻蚀作用,促进活性炭造孔;该发明工艺简单、绿色无污染,但该技术不具备氧化性,无法脱除SO2;
现有技术还公开了一种发明,申请号为CN201410459066.7,授权公告号CN104190432A,授权公告日20141210,名称为一种低温脱硝协同脱硫活性炭催化剂及其制备方法,该技术以SnCl4和V2O5为活性组分,以活性炭为载体,以Fe2O3和CeO2为助剂,该催化剂在70-200℃范围内,氮氧化物的净化效率达85%以上,硫容达36mg/g,但该工艺选择性差,无法分离SO2和NOx,且硫容低,循环再生后硫容下降明显,不适合工业应用。
发明内容
本发明的目的是提供一种炭基脱硫催化剂及制备方法。为了实现上述发明目的,本发明炭基脱硫催化剂及制备方法采用的如下技术方案:
一种炭基脱硫催化剂,包括活性组分、载体和功能助剂,所述的活性组分为铜、钴和镨的复合氧化物,所述的载体为硫磷共掺杂活性炭,所述的功能助剂为氟掺杂棒状二氧化铈纳米粒子;其中:铜、钴和镨的复合氧化物中CuO、CoO和Pr6O11的质量比为1:(0.1-3):(0.1-3),所述的活性组分、载体和功能助剂的质量比为(0.01-3):1:(0.01-3)。
本发明技术方案中:铜、钴和镨的复合氧化物中CuO、CoO和Pr6O11的质量比为1:(0.1-0.4):(0.1-0.2),所述的活性组分、载体和功能助剂的质量比为(0.01-0.05):1:(0.01-0.1)。
一种上述的炭基脱硫催化剂的制备方法,该方法的步骤如下:
(1)将烘干的活性炭与硫脲混合,气氛炉热解;冷却至室温后放入KOH溶液中浸渍;浸渍完成后烘干、煅烧,制得硫掺杂活性炭前驱体;
(2)将步骤(1)制备的硫掺杂活性炭前驱体放入磷酸溶液中酸化,过滤,烘干,煅烧,制得硫磷共掺杂活性炭混合物;
(3)将硝酸铈、三氟化铈、NaOH溶液于水热釜内水热反应,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂;
(4)将铜盐、钴盐和镨盐溶解于水中,滴加碱性造孔剂溶液,调节pH至8-9,至混合溶液;
(5)将步骤(2)硫磷共掺杂活性炭混合物、步骤(3)氟掺杂棒状二氧化铈纳米粒子与步骤(4)混合溶液混合,烘干,煅烧,制得催化剂成品。
上述方法中:步骤(1)中活性炭原料和硫脲的质量比为1:(2-5),KOH溶液质量浓度为20-50%;
所述步骤(1)中热解温度为300-500℃,热解气氛为氮气或氩气,热解时间为1-2h;
浸渍时间为1-2h;烘干温度为80-120℃,烘干时间2-8h;煅烧温度为600-850℃,煅烧气氛为氮气或氩气,煅烧时间为0.5-6h。
上述方法中:步骤(2)中磷酸溶液质量浓度为0.1-4%;
所述步骤(2)中酸化时间1-2h,烘干温度80-120℃,烘干时间2-8h,煅烧温度400-700℃,煅烧气氛为氮气或氩气,煅烧时间0.5-6h。
上述方法中:步骤(3)中NaOH溶液质量浓度为20-50%;硝酸铈、三氟化铈、NaOH溶液质量比为1:1:(4-10);
所述步骤(3)中水热反应温度为150-300℃,反应压力为1-2Mpa,反应时间为2-8h。
上述方法中:所述步骤(4)中铜盐为硝酸铜、氯化铜中的一种或多种;钴盐为硝酸钴、乙酸钴、氯化钴中的一种或多种;镨盐为硝酸镨、氯化镨、硫酸镨中的一种或多种。
上述方法中:所述步骤(5)中烘干温度为80-120℃,烘干时间为2-8h,煅烧温度750-900℃,煅烧气氛为氮气或氩气,煅烧时间4-6h。
本发明技术方案中,上述方法制备得到的炭基脱硫催化剂在作为氧化剂方面的应用;优选作为二氧化硫氧化为三氧化硫的催化剂。
上述方法中:活性炭的粒径为0.3~0.8mm。
与现有技术相比,本发明的有益效果在于:
1、本发明以铜、钴和镨复合氧化物为活性组分,硫磷共掺杂活性炭为载体,氟掺杂棒状二氧化铈纳米粒为功能助剂,通过活性组分调控氧化SO2性能和选择性,通过助剂和载体增强催化剂硫容和再生寿命;
2、本发明制得的催化剂低温段脱除SO2效率高,在50-200℃温度范围内脱除SO2效率均大于95%,催化剂硫容>70mg/g,可循环再生,机械强度高,环境友好,骨架稳定性好,适用于电力、水泥、玻璃、陶瓷等行业烟气脱硫。
附图说明
图1为实施例1制备的氟掺杂棒状二氧化铈纳米粒子TEM照片。
图2为实施例1、实施例2、对比例1和对比例2脱硫效率曲线。
具体实施方式
下面结合具体实施方式,进一步阐明本发明,应理解这些实施方式仅用于说明本发明而不用于限制本发明的范围,在阅读了本发明之后,本领域技术人员对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。
实施例1:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,100℃烘干4h;
(2)配置质量浓度30%的KOH溶液A,配置质量浓度1%的磷酸溶液B,配置质量浓度20%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与500g的硫脲混合,氮气气氛炉450℃热解2h;冷却至室温后放入步骤(2)配置的溶液A中浸渍2h;浸渍完成后100℃烘干4h、氮气气氛下750℃煅烧4h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化2h,过滤,100℃烘干6h,氮气气氛下700℃煅烧4h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、40g溶液C于水热釜内200℃,反应压力2Mpa(表压),水热反应8h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E,如图1;
(6)将2.34g硝酸铜、0.49g硝酸钴和0.29g硝酸镨溶解于水中,滴加碳酸铵溶液,调节pH至8-9,至混合溶液F;
(7)将33.75g步骤(4)制得的混合物D、3.38g步骤(5)制备的功能助剂E与溶液F混合,100℃烘干6h,氩气气氛下900℃煅烧6h,制得催化剂成品。
(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于99.42%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容99.32mg/g。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为98.71%。
实施例2:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,80℃烘干2h;
(2)配置质量浓度20%的KOH溶液A,配置质量浓度0.1%的磷酸溶液B,配置质量浓度20%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与300g的硫脲混合,氮气气氛炉300℃热解2h;冷却至室温后放入步骤(2)配置的溶液A中浸渍2h;浸渍完成后80℃烘干8h、氮气气氛下600℃煅烧6h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化2h,过滤,80℃烘干8h,氮气气氛下400℃煅烧6h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、40g溶液C于水热釜内300℃,反应压力1Mpa(表压),水热反应8h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(6)将2.34g硝酸铜、0.94g乙酸钴和0.15g氯化镨溶解于水中,滴加碳酸铵溶液,调节pH至8-9,至混合溶液F;
(7)将150g步骤(4)制得的混合物D、7.5g步骤(5)制备的功能助剂E与溶液F混合,80℃烘干8h,氮气气氛下750℃煅烧6h,制得催化剂成品。
(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于96.54%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容98.34mg/g。多次循环测试的脱硫催化剂硫容结果见表一。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为99.42%。
实施例3:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,120℃烘干2h;
(2)配置质量浓度50%的KOH溶液A,配置质量浓度4%的磷酸溶液B,配置质量浓度50%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与400g的硫脲混合,氮气气氛炉500℃热解1h;冷却至室温后放入步骤(2)配置的溶液A中浸渍1h;浸渍完成后120℃烘干2h、氮气气氛下850℃煅烧0.5h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化1h,过滤,120℃烘干2h,氮气气氛下700℃煅烧0.5h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、100g溶液C于水热釜内300℃,反应压力2Mpa(表压),水热反应2h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(6)将2.34g硝酸铜、0.52g氯化钴和0.17g硫酸镨溶解于水中,滴加碳酸氢铵溶液,调节pH至8-9,至混合溶液F;
(7)将70g步骤(4)制得的混合物D、4.2g步骤(5)制备的功能助剂E与溶液F混合,120℃烘干2h,氮气气氛下900℃煅烧4h,制得催化剂成品。
(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于96.15%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容92.14mg/g。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为93.19%。
实施例4:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,100℃烘干4h;
(2)配置质量浓度30%的KOH溶液A,配置质量浓度3%的磷酸溶液B,配置质量浓度30%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与300g的硫脲混合,氮气气氛炉400℃热解1.5h;冷却至室温后放入步骤(2)配置的溶液A中浸渍1.5h;浸渍完成后100℃烘干4h、氮气气氛下700℃煅烧3h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化1.5h,过滤,100℃烘干4h,氮气气氛下500℃煅烧3h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、80g溶液C于水热釜内200℃,反应压力1.5Mpa(表压),水热反应4h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(6)将1.69g氯化铜、0.94g乙酸钴和0.38g硝酸镨溶解于水中,滴加碳酸铵溶液,调节ph至8-9,至混合溶液F;
(7)将53.33g步骤(4)制得的混合物D、4.27g步骤(5)制备的功能助剂E与溶液F混合,100℃烘干4h,氮气气氛下800℃煅烧5h,制得催化剂成品。
(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于99.01%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容96.62mg/g。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为91.47%。
实施例5:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,80℃烘干8h;
(2)配置质量浓度20%的KOH溶液A,配置质量浓度1%的磷酸溶液B,配置质量浓度40%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与400g的硫脲混合,氮气气氛炉500℃热解1h;冷却至室温后放入步骤(2)配置的溶液A中浸渍2h;浸渍完成后120℃烘干2h、氮气气氛下700℃煅烧3h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化1h,过滤,80℃烘干8h,氮气气氛下700℃煅烧0.5h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、80g溶液C于水热釜内250℃,反应压力1.5Mpa(表压),水热反应4h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(6)将1.69g氯化铜、0.17g氯化钴和0.29g氯化镨溶解于水中,滴加碳酸氢铵溶液,调节ph至8-9,至混合溶液F;
(7)将32.5g步骤(4)制得的混合物D、3.25g步骤(5)制备的功能助剂E与溶液F混合,100℃烘4h,氮气气氛下800℃煅烧5h,制得催化剂成品。
(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于95.14%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容94.21mg/g。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为93.25%。
对比例1:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,100℃烘干4h;
(2)配置质量浓度20%的NaOH溶液C;
(3)将10g硝酸铈、10g三氟化铈、40g溶液C于水热釜内200℃,反应压力2Mpa(表压),水热反应8h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(4)将2.34g硝酸铜、0.49g硝酸钴和0.29g硝酸镨溶解于水中,滴加碳酸铵溶液,调节ph至8-9,至混合溶液F;
(5)将33.75g步骤(1)制得的活性炭、3.38g步骤(3)制备的功能助剂E与溶液F混合,100℃烘干6h,氩气气氛下900℃煅烧6h,制得催化剂成品。
(6)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于21.46%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容73.59mg/g。多次循环测试的脱硫催化剂硫容结果见表一。
(7)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为89.31%。
(10)对比效果:与实例1对比可以看出,采用未改性活性炭载体,催化剂初始硫容仅为73.59mg/g,多次循环再生,催化剂硫容下降快,脱硫效率和SO2/SO3转化率也较低(分别为21.46%和89.31%)。
对比例2:
(1)取粒度为0.3-0.8mm的活性炭原材料100g,采用去离子水洗涤,过滤,100℃烘干4h;
(2)配置质量浓度30%的KOH溶液A,配置质量浓度1%的磷酸溶液B,配置质量浓度20%的NaOH溶液C;
(3)将步骤(1)烘干的活性炭原材料与500g的硫脲混合,氮气气氛炉450℃热解2h;冷却至室温后放入步骤(2)配置的溶液A中浸渍2h;浸渍完成后100℃烘干4h、氮气气氛下750℃煅烧4h,制得硫掺杂活性炭前驱体;
(4)将步骤(3)制备的前驱体放入步骤(2)配置的溶液B中酸化2h,过滤,100℃烘干6h,氮气气氛下700℃煅烧4h,制得硫磷共掺杂活性炭混合物D;
(5)将10g硝酸铈、10g三氟化铈、40g溶液C于水热釜内200℃,反应压力2Mpa(表压),水热反应8h,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂E;
(7)将33.75g步骤(4)制得的混合物D、3.38g步骤(5)制备的功能助剂E与去离子水混合,100℃烘干6h,氩气气氛下900℃煅烧6h,制得催化剂成品。(8)催化脱硫活性及硫容测试:取100g催化剂小样装入催化剂性能评价反应装置中,评价反应装置中石英管内径为40mm,通入模拟气进行活性评价。模拟的气体的组成为:SO2(2400ppm)、O2(6vol.%)、H2O(6vol.%)、N2为载气,GHSV为1440h-1,气体总流量为2.4L/min,温度80℃,吸附300min时间内,催化剂脱硫效率不低于75.79%。吸附饱和后,400℃氮气吹扫,计算催化剂初始硫容91.52mg/g。多次循环测试的脱硫催化剂硫容结果见表一。
(9)SO2/SO3转化率测试:采用热重红外联用测试的催化剂吸附的三氧化硫占总吸附硫比为17.3%。
(10)对比效果:与实例1对比可以看出,未添加活性组分时,催化剂脱硫效率低(75.79%),SO2/SO3转化低(17.3%)。
循环测试结果:多次循环测试的脱硫催化剂硫容结果见表一。
表一
Claims (9)
1.一种炭基脱硫催化剂,其特征在于:包括活性组分、载体和功能助剂,所述的活性组分为铜、钴和镨的复合氧化物,所述的载体为硫磷共掺杂活性炭,所述的功能助剂为氟掺杂棒状二氧化铈纳米粒子;其中:铜、钴和镨的复合氧化物中CuO、CoO和Pr6O11的质量比为1:(0.1-3):(0.1-3),所述的活性组分、载体和功能助剂的质量比为(0.01-3):1:(0.01-3)。
2.根据权利要求1所述的炭基脱硫催化剂,其特征在于:铜、钴和镨的复合氧化物中CuO、CoO和Pr6O11的质量比为1:(0.1-0.4):(0.1-0.2),所述的活性组分、载体和功能助剂的质量比为(0.01-0.05):1:(0.01-0.1)。
3.一种权利要求1所述的炭基脱硫催化剂的制备方法,其特征在于,该方法的步骤如下:
(1)将烘干的活性炭与硫脲混合,气氛炉热解;冷却至室温后放入KOH溶液中浸渍;浸渍完成后烘干、煅烧,制得硫掺杂活性炭前驱体;
(2)将步骤(1)制备的硫掺杂活性炭前驱体放入磷酸溶液中酸化,过滤,烘干,煅烧,制得硫磷共掺杂活性炭混合物;
(3)将硝酸铈、三氟化铈、NaOH溶液于水热釜内水热反应,分离,洗涤、干燥得氟掺杂棒状二氧化铈纳米粒子功能助剂;
(4)将铜盐、钴盐和镨盐溶解于水中,滴加碱性造孔剂溶液,调节pH至8-9,至混合溶液;
(5)将步骤(2)硫磷共掺杂活性炭混合物、步骤(3)氟掺杂棒状二氧化铈纳米粒子与步骤(4)混合溶液混合,烘干,煅烧,制得催化剂成品。
4.根据权利要求3所述的炭基脱硫催化剂的制备方法,其特征在于:步骤(1)中活性炭原料和硫脲的质量比为1:(2-5),KOH溶液质量浓度为20-50%;
所述步骤(1)中热解温度为300-500℃,热解气氛为氮气或氩气,热解时间为1-2h;
浸渍时间为1-2h;烘干温度为80-120℃,烘干时间2-8h;煅烧温度为600-850℃,煅烧气氛为氮气或氩气,煅烧时间为0.5-6h。
5.根据权利要求3所述的炭基脱硫催化剂的制备方法,其特征在于:步骤(2)中磷酸溶液质量浓度为0.1-4%;
所述步骤(2)中酸化时间1-2h,烘干温度80-120℃,烘干时间2-8h,煅烧温度400-700℃,煅烧气氛为氮气或氩气,煅烧时间0.5-6h。
6.根据权利要求3所述的炭基脱硫催化剂的制备方法,其特征在于:步骤(3)中NaOH溶液质量浓度为20-50%;硝酸铈、三氟化铈、NaOH溶液质量比为1:1:(4-10);
所述步骤(3)中水热反应温度为150-300℃,反应压力为1-2Mpa,反应时间为2-8h。
7.根据权利要求3所述的炭基脱硫催化剂的制备方法,其特征在于:所述步骤(4)中铜盐为硝酸铜、氯化铜中的一种或多种;钴盐为硝酸钴、乙酸钴、氯化钴中的一种或多种;镨盐为硝酸镨、氯化镨、硫酸镨中的一种或多种。
8.根据权利要求2所述的炭基脱硫催化剂的制备方法,其特征在于:所述步骤(5)中烘干温度为80-120℃,烘干时间为2-8h,煅烧温度750-900℃,煅烧气氛为氮气或氩气,煅烧时间4-6h。
9.权利要求1所述的炭基脱硫催化剂在作为氧化剂方面的应用;优选作为二氧化硫氧化为三氧化硫的催化剂。
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