摘要:
The present invention generally relates to a catalytic gasification of coal. Catalytic gasification of a Wyodak low-sulfur sub-bituminous coal from the Powder River Basin of Wyoming was investigated using an inexpensive sodium carbonate catalyst applied via incipient wetness impregnation. Experiments in an atmospheric pressure fixed-bed laboratory gasifier were performed to evaluate the effects of reaction temperature, feed gas steam content, and Na2CO3 loading on the catalytic gasification of the Wyodak coal. The temperature range investigated (700-900° C.) was selected with consideration of the Na2CO3 melting point (850° C.) to reduce the loss by volatilization of sodium. Sodium was found to be active during both pyrolysis and gasification steps. The catalyst was most cost-effective at addition levels of approximately 3 wt %. The random pore model provided a good fit to the conversion versus time data collected under both the catalytic and the uncatalytic conditions.
摘要翻译:本发明一般涉及煤的催化气化。 使用廉价的碳酸钠催化剂,通过初始湿度浸渍法研究了怀俄明州粉河流域Wyodak低硫次烟煤的催化气化。 进行大气压固定床实验室气化炉的实验,以评估反应温度,进料气体蒸汽含量和Na2CO3负载对Wyodak煤的催化气化的影响。 考虑到Na 2 CO 3熔点(850℃)来选择所研究的温度范围(700-900℃)以减少钠的挥发损失。 发现在热解和气化步骤期间钠都具有活性。 催化剂在添加量约3重量%时是最具成本效益的。 随机孔模型提供了在催化和非催化条件下收集的转化对时间数据的良好拟合。
摘要:
The present invention generally relates to a catalytic gasification of coal. Catalytic gasification of a Wyodak low-sulfur sub-bituminous coal from the Powder River Basin of Wyoming was investigated using an inexpensive sodium carbonate catalyst applied via incipient wetness impregnation. Experiments in an atmospheric pressure fixed-bed laboratory gasifier were performed to evaluate the effects of reaction temperature, feed gas steam content, and Na2CO3 loading on the catalytic gasification of the Wyodak coal. The temperature range investigated (700-900° C.) was selected with consideration of the Na2CO3 melting point (850° C.) to reduce the loss by volatilization of sodium. Sodium was found to be active during both pyrolysis and gasification steps. The catalyst was most cost-effective at addition levels of approximately 3 wt %. The random pore model provided a good fit to the conversion versus time data collected under both the catalytic and the uncatalytic conditions.
摘要翻译:本发明一般涉及煤的催化气化。 使用廉价的碳酸钠催化剂,通过初始湿度浸渍法研究了怀俄明州粉河流域Wyodak低硫次烟煤的催化气化。 进行大气压固定床实验室气化炉的实验,以评估反应温度,进料气体蒸汽含量和Na2CO3负载对Wyodak煤催化气化的影响。 考虑到Na 2 CO 3熔点(850℃)来选择所研究的温度范围(700-900℃)以减少钠的挥发损失。 发现在热解和气化步骤期间钠都具有活性。 催化剂在添加量约3重量%时是最具成本效益的。 随机孔模型提供了在催化和非催化条件下收集的转化对时间数据的良好拟合。
摘要:
The adsorption of vapor phase elemental mercury onto the commercially produced Thief carbon and impregnated Thief carbon with ferric chloride and sodium chloride is disclosed. The results indicate that the impregnation of these sorbents enhanced considerably their capacity and changed the sorption mechanism. Ferric chloride impregnated Thief carbon sorbents presented the highest sorption capacity.
摘要:
The invention generally relates to a bi-directional reactor and supported amine sorbent, and more particularly to a method and system for carbon dioxide sequestration utilizing a bi-directional reactor and monoethenalamine (MEA) on a substrate. The bi-directional reactor is configured to reclaim the sorbent material as the sorbent is immobilized during the sorption phase, but is mobilized during desorption phased. The immobilized sorbent reacts with the desired contaminate to absorb and is transported to another reactor during desorption phase, thereby permitting reclamation of the sorbent.
摘要:
The invention generally relates to a bi-directional reactor and supported amine sorbent, and more particularly to a method and system for carbon dioxide sequestration utilizing a bi-directional reactor and monoethenalamine (MEA) on a substrate. The bi-directional reactor is configured to reclaim the sorbent material as the sorbent is immobilized during the sorption phase, but is mobilized during desorption phased. The immobilized sorbent reacts with the desired contaminate to absorb and is transported to another reactor during desorption phase, thereby permitting reclamation of the sorbent.
摘要:
A novel method for recovering carboxylic acid from a waste water stream is described. The method involves first neutralizing the carboxylic acid in the waste water with CaO or Ca(OH)2 to form calcium carboxylate. The resulting calcium carboxylate is then reacted with sulfite or sulfate to regenerate the carboxylic acid. The resulting waste water typically has a carboxylic acid content of at least 25-wt %.
摘要:
CO2 capture from flue gas is a costly procedure, usually due to the energy required for regeneration of the capture medium. One potential medium which could reduce such an energy consumption, however, is Na2CO3. It has been well studied as a sorbent, and it is understood that the theoretical energy penalty of use of Na2CO3 for CO2 separation is low, due to the relatively low heat of reaction and low heat capacity of the material. While it offers some advantages over other methods, its primary downfall is the slow reaction with CO2 during adsorption and the slow Na2CO3 regeneration process. An aspect of the invention relates to a catalyst to improve reaction kinetics, and more particularly to a catalyst to improve reaction kinetics for CO2 desorption and CO2 adsorption.
摘要翻译:烟道气中的二氧化碳捕获是一个昂贵的过程,通常是由于捕获介质再生所需的能量。 然而,可以减少这种能量消耗的一种潜在介质是Na 2 CO 3。 作为吸附剂已经被很好地研究,并且可以理解,由于反应热较少并且材料的热容量低,使用Na 2 CO 3进行CO 2分离的理论能量损失较低。 虽然它比其他方法提供了一些优势,但它的主要垮台是吸附过程中CO2的缓慢反应和缓慢的Na2CO3再生过程。 本发明的一个方面涉及一种改善反应动力学的催化剂,更具体地说涉及一种改善CO 2解吸和CO 2吸附反应动力学的催化剂。
摘要:
A method for removing elements, including heavy metals, from fly ash and from fly ash resulting from removal of SOx/NOx from flue gas using Na2CO3/NaHCO3/trona, is described. An aqueous suspension of the fly ash and/or a solution of the leachate from the fly ash is treated with dissolved ferrous compounds, such as FeSO4.7H2O and/or FeCl2.4H2O, at a chosen initial acidic pH, and the precipitation of the ferrous ions as the solution basifies sequesters the trace elements.
摘要翻译:描述了使用Na 2 CO 3 / NaHCO 3 /天然碱从烟灰中除去来自飞灰和从烟道气中除去SO x / NO x产生的飞灰的元素(包括重金属)的方法。 在所选择的初始酸性pH下,用溶解的亚铁化合物如FeSO 4·7H 2 O和/或FeCl 2·4H 2 O处理飞灰和/或来自飞灰的渗滤液的溶液的水悬浮液, 作为溶液的亚铁离子可以螯合微量元素。
摘要:
The present invention is a new, easy method for preparing stable solid Fe6+—Fe3+ agents in a fixed bed reactor by using O3 and FeOOH along with KOH with conversion efficiencies of approximately 27%. In addition, the product has been used to oxidize oil from water and to destroy tetracycline in water