凹凸棒石基脱硫剂的制备及其性能评价

采用沉淀法在凹凸棒石表面分别负载了铁和锌元素,制得Fe/凹凸棒石脱硫剂和Zn/凹凸棒石脱硫剂。用XRD、TEM和TPR等方法表征制得的两种凹凸棒石基脱硫剂,研究凹凸棒石基脱硫剂在氨水、盐酸中的稳定性;通过检测脱硫过程中尾气中H2S浓度的变化并分析脱硫剂的硫容比较两种脱硫剂的脱硫性能。分析了粒度、负载量和自体再生次数对铁脱硫剂的硫容的影响。结果表明,活性组分在凹凸棒石表面负载均匀;铁脱硫剂的脱硫性能较好,其硫容是活性炭的120倍,是锌脱硫剂的7.67倍;减小粒度和增加负载量都可以提高硫容,其自体有再生能力但再生仅能恢复脱硫剂的部分脱硫功能。Fe/凹凸棒石脱硫剂在脱硫领域有较好的应用前景。

Preparation and characterization of desulfurizer loaded on attapulgite

Fe/attapulgite and Zn/attapulgite desulfurizer were prepared by loading Fe and Zn element on attapulgite by precipitation.The desulfurizers were characterized by XRD，TEM and TPR.The stability of desulfurizers in ammonia water and hydrochloric acid was studied.Additionally，the changes of concentration of H₂S in the off-gas were investigated in the sweetening process and the desulfurization capacities of two desulfurizers were compared.The influence of grain size，load amount and self-regeneration times on desulfurization capacity of Fe/attapulgite was studied.The results showed that active components were loaded on the surface of attapulgite uniformly.Fe/attapulgite had good desulfurization capability and self-reset capability，and its desulfurization capacity was 120 times that of active carbon and 7.67 times that of Zn/attapulgite.Decrease of grain size and increase of load amount could increase desulfurization capacity but regeneration by itself could only recover part of desulfurization capacity.Fe/attapulgite desulfurizer has wide application as a good desulfurizer.