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为了提供高品质的燃油,进行技术改造是我国炼油企业面临的重要课题。烷基化脱硫技术和催化精馏技术是目前被广泛研究和应用的两大技术。但是将催化精馏技术应用于烷基化硫转移中还是一种比较新的尝试,已经得到了众多研究者的关注。本文以此为出发点,通过分析不同的研究成果,分别从催化精馏设备、催化剂种类及目前应用的工艺3个方面进行综述并给出今后的主要研究方向。催化剂是整个工艺技术中至关重要的部分,文中主要介绍了离子交换树脂催化剂和分子筛催化剂,二者均具有良好的选择性和稳定性,因而被广泛应用。但是催化剂在应用过程中,都需要一定的温度,如何开发低温下应用的新型高效催化剂无疑将是重要的一个研究方向。常用催化剂填装技术主要是拟固定床式和拟填料式2种,进行填装技术的改造开发从而提高催化剂的利用效率和气液传质效率。催化精馏应用于烷基化硫转移由于是一种新的尝试,因而实际的应用工艺案例不多。本文主要研究分析了目前应用的几种工艺,结果表明将催化精馏技术与烷基化脱硫相结合的应用是可行的,不仅如此,该工艺技术在反应转化率和选择性等方面也均表现出优良的性能,其硫转移效率均可达90%以上,且具有良好的应用前景。因此,加强基础实验研究,为设计准确高效的工艺提供依据将是今后一段时间内的主要研究内容。
In order to provide high-quality fuel, technological transformation is an important issue facing China’s oil refineries. Alkylation desulfurization technology and catalytic distillation technology is currently widely studied and applied two major technologies. However, the application of catalytic distillation technology in the alkylation of sulfur transfer is still a relatively new attempt, which has attracted the attention of many researchers. This article takes this as a starting point, through the analysis of different research results, summarizes three aspects of the catalytic distillation equipment, the type of catalyst and the currently applied process and gives the main research directions in the future. The catalyst is a crucial part of the whole process technology. The article mainly introduces ion exchange resin catalyst and molecular sieve catalyst. Both of them have good selectivity and stability and are widely used. However, the catalyst needs a certain temperature during the application process. How to develop a new type of high-efficiency catalyst for application under low temperature will undoubtedly be an important research direction. Common catalyst filling technology is mainly intended to be fixed bed and filler type 2, filling technology to develop and improve the catalyst utilization efficiency and gas-liquid mass transfer efficiency. Catalytic distillation applied to the alkylation of sulfur transfer is a new attempt, and thus the actual application of small number of cases. In this paper, we mainly studied and analyzed several technologies currently used. The results show that the combination of catalytic distillation technology and alkylation desulfurization is feasible. Not only this, but also the performance of the technology in reaction conversion rate and selectivity Out of excellent performance, the sulfur transfer efficiency can reach more than 90%, and has good application prospects. Therefore, to strengthen the basic experimental research, to provide a basis for the design of accurate and efficient technology will be the main part of the study for some time to come.