共查询到19条相似文献,搜索用时 156 毫秒
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国产钯碳催化剂的工业应用 总被引:1,自引:0,他引:1
介绍了国产钯碳催化剂的工业应用情况,分别从活性,寿命等方面对比国产和进口催化剂的性能,确认目前国产钯碳催化剂已达到了工业装置应用标准。 相似文献
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本较详细地介绍了常温COS水解催化剂的实验室再生及工业试生产过程,实验室及工业应用结果表明,再生后催化剂的活性明显优于废催化剂的活性,也略优于国内样品T,能满足工厂的要求,再生工艺合理,简单。 相似文献
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论述了制合成气过程催化剂的选择及重要性,转化催化剂要求有较好的低温活性和抗积炭性能,中变催化剂考虑催化剂本体含硫量,低变催化剂要从活性、热稳定性、堆积密度、还原后体积收缩率、烧失重和自由水含量等方面衡量,甲烷化催化剂的选用要根据设备状况满足工艺要求方面考虑。催化剂的使用寿命既与合理选用催化剂有重要关系,也与工业应用过程中的正确使用和维护有关。 相似文献
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QCS—04催化剂在哈尔滨气化厂的工业应用 总被引:1,自引:0,他引:1
介绍QCS-04催化剂在中国制取城市煤气装置上的首次运行情况。结果表明:该催化剂的强度,催化活性,尤其是烧碳再生和抗水合性能均能满足工业生产条件的要求。 相似文献
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简述了碎煤气化制天然气工艺流程,通过对鲁奇气化炉的优化改进,实现了用劣质煤造气,并大大提高了气化氧负荷;通过换用QDB-04催化剂,耐硫变换工段获得了很好的运行效果,解决了催化剂烧碳再生易粉碎的难题。 相似文献
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Accompanying the fast burning of coke on a cracking catalyst is the oxidation of the coke burning product, carbon monoxide. This carbon monoxide combustion involves a homogeneous and a catalytic reaction. The homogeneous reaction was isolated by injecting pulses of CO, CO2 and O2 into a laboratory scale reactor at controlled temperature and pressure. The coke burning and catalytic CO combustion reactions were studied by oxidizing coke deposited on a zeolitic catalyst in the same microcatalytic reactor. The role of homogeneous CO oxidation during coke combustion under these conditions was determined. 相似文献
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In order to obtain a better understanding of the combustion characteristics of ammonium nitrate (AN) and carbon (C) mixtures (AN/C), burning tests and differential scanning calorimetry (DSC) were performed. AN mixed with carbon that is oxidized by nitric acid (HNO3), such as activated carbon (AC), burned at 1 MPa. However, AN mixed with carbon that is not oxidized by HNO3, such as graphite, did not burn under 7 MPa. Compositions with more than stoichiometric amounts of activated carbon had higher burning rates. Heat characteristic examinations found a similar trend. The burning rate of AN/AC mixed with CuO as a combustion catalyst deteriorated faster than an additive‐free one. From the DSC result, AN/AC/CuO had a higher onset temperature and a lower heat of reaction than AN/AC. These results suggested that, in the combustion wave of AN/C, a thermal decomposition zone is formed on the burning surface, and combustion performance was affected by the thermal decomposition of AN/C. 相似文献
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生物质催化热解获得生物油等高质产品是最有前途替代传统化石能源的方法之一,但在热解过程中存在着严重的催化剂失活问题,其中积炭是导致催化剂失活的最主要因素。本文对近年来生物质催化热解领域的催化剂积炭问题进行综述,重点介绍催化剂积炭失活原因及表征方法、积炭的影响因素分析(催化剂结构、催化剂酸性与反应温度)、抑制催化剂积炭的方法 (催化剂改性、高压反应条件等)以及积炭催化剂再生方法 (氧化灼烧再生、臭氧低温再生、非热等离子体再生等),并介绍了近年来新兴的微波催化热解技术对催化剂积炭的抑制和消除作用,然后针对该领域目前所面临的困难和发展方向进行展望,以期为生物质催化热解过程中催化剂积炭问题研究提供理论基础。 相似文献
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以工业两段绝热床中运行近4000h的结炭B—02催化剂为研究对象,利用内循环无梯度反应器,求得催化剂烧炭再生本征动力学模型.由于催化剂中的结炭是多核芳烃,因此可简单地以碳氧化和氢氧化的动力学方程表征烧炭再生动力学模型.碳氧化动力学方程为-dN_c/N_Cdt=K_Cp_(O_2)~(0.3)(N_C/N_C)~1.3式中,一段催化剂 K_C=13.37exp[-78.97×10~3/(RT)]二段催化剂 K_C=96.54exp[-89.30×10~3/(RT)]氢氧化动力学方程为-dN_H/N_Hdt=K_H(N_H/N_H)~1.1式中,一段催化剂 K_H=0.48exp[-39.04×10~3/(RT)]二段催化剂 K_H=4.79exp[-52.03×10~3/(RT)] 相似文献
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In the study of the regeneration of cracking catalyst, two approaches may be taken when determining the kinetic rate constant for the coke combustion reaction. A global coke burning rate equation may be considered, based on the observed oxygen concentration and carbon dioxide to carbon monoxide molar product ratio. This reaction may also be represented by an intrinsic coke burning equation which is a function of the oxygen concentration and the carbon dioxide to carbon monoxide molar ratio at the reaction site, combined with a carbon monoxide postcombustion equation. It is proposed in this paper that the rate constant for intrinsic coke burning, kc, is essentially equal to the global coke burning rate constant, kc, and that its value is independent of the rate equation chosen for the carbon monoxide post-combustion reaction. 相似文献