Optimising Process Conditions to Obtain Distillate Properties Within Regional Specifications

Adebimpe Oyeyele, Camilla Junaid, Kawu Idris-Idah, Daniel Olomolaiye, Eretoru Robert
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Abstract

In this work, a case study of a modular crude oil refinery is carried out. Located in Imo State, Nigeria, it is the first refinery to simultaneously produce four (4) petroleum products - Naphtha, Kerosene, Automotive Gas Oil (AGO) (i.e., Diesel) and Heavy Pour Fuel Oil (HPFO), that have constantly met the requirements of the Nigerian Department of Petroleum Resources (DPR). The refinery is situated beside the Ibigwe Marginal Field from which it obtains its crude oil; it represents perhaps the personification of efficiency in maximizing value from petroleum resources. Numerous lessons exist for prospective modular refiners. The paper aims to identify optimal process conditions and discuss a data-focused strategy utilized in ensuring optimal distillation column parameters required to achieve the production of "on-spec" (that is, meeting the desired regulatory/client quality specifications) distillates. The set points of temperatures and pressures for the distillation and stripping of each product were examined, while assessing the impact of changes in feed stock properties, product specifications or ambient conditions and the adjustments that needed to be made to process conditions. Some examples of the concerned characteristics of the product required to meet specification are API Gravity, Flash point and Pour Point. The reflux temperature, petroleum products draw rate, etc. are few variables to be appropriately manipulated. Strategies were developed and implemented for all stages of the refinery’s development – preliminary ones being the Design stage and Construction stage, with the ongoing one being the operation stage. Literature alludes to refiners categorizing "meeting specifications" as a potential problem. For example, you have now obtained "on spec" kerosene, what quantity of "on spec" diesel is left? In this paper, the technical journey to meeting DPR requirements is narrated, aiming to transfer knowledge and further develop the nation’s ability to meet its energy needs.
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优化工艺条件以获得符合区域规格的馏分物特性
本文以某模块化原油炼油厂为例进行了研究。它位于尼日利亚的伊莫州,是第一家同时生产四(4)种石油产品的炼油厂-石脑油,煤油,车用汽油(AGO)(即柴油)和重倒燃料油(HPFO),一直满足尼日利亚石油资源部(DPR)的要求。该炼油厂位于Ibigwe边际油田旁边,从那里获得原油;它可能代表了石油资源价值最大化效率的化身。有许多经验可供未来的模块化精炼者借鉴。本文旨在确定最佳工艺条件,并讨论以数据为中心的策略,以确保生产“符合规格”(即满足所需的监管/客户质量规格)馏出物所需的最佳蒸馏塔参数。检查了每种产品蒸馏和剥离的温度和压力设定值,同时评估了原料特性、产品规格或环境条件变化的影响,以及需要对工艺条件进行的调整。需要满足规格的产品的有关特性的一些例子是API重力,闪点和倾点。回流温度、成品油提取率等是需要适当控制的少数变量。炼油厂发展的所有阶段都制定和实施了战略——初步阶段是设计阶段和建设阶段,正在进行的阶段是运营阶段。文献暗示精炼者将“满足规范”归类为潜在问题。例如,你现在已经获得了“规格”煤油,那么“规格”柴油还剩下多少?本文叙述了满足DPR要求的技术历程,旨在传递知识,进一步发展国家满足其能源需求的能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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