GOALI: The Use of Sequestrants for the Dissolution of Scaling Deposits

格兰特，克里斯汀·S·北卡罗来纳州立大学，题为“瓜利：使用隔离剂溶解结垢沉积物”这项研究的主要目标是阐明在环境友好的螯合聚合物存在下导致矿盐溶解的传输和界面机制(S)。由于重晶石广泛存在于石油加工管道及相关设备中的结垢沉积物中，因此本研究选择重晶石作为主要工作材料。PI已经确定，在特定的pH下，溶液中存在多种聚合物物种。这些个体物种的行为及其对溶解速度的协同影响对于理解溶解过程至关重要。溶解研究将在不同的pH条件下进行，对应于对溶液中各种主要聚合物配体物种的研究。这项建议的目标部分将与英国石油公司上游技术集团油井动态团队的规模管理顾问Ian Collins博士一起进行。新的BP互动包括三个方面：(I)BP研究人员将为受控流体动力转盘研究提供技术信息和“研究级”和“野外级”重晶石样本；(Ii)溶解实验的具体条件将与BP研究人员和实际现场工程师一起制定，以确保与当前和未来的石油勘探活动相关；(Iii)BP研究人员将在项目中为学生研究人员提供咨询作用。PI还将继续利用Donlar Corporation的化学家在该过程的化学反应动力学序列中的专业知识。广泛影响：在存在热聚天冬氨酸的情况下对硫酸钡进行初步批量测试，表明在特定条件下存在溶解抑制。在拟议的研究中，PI预计在特定的pH、剪切、聚合物浓度/类型的条件下，重晶石将增强溶解，重晶石是石油加工规模中的一种常见物种。这将对应于特定的聚合物构象/吸附组合，导致独特的溶解机制。纯矿物和代表实际工业条件的矿物复合材料的行为应该有所不同。与寻求抑制管道和设备上矿物结垢形成的研究不同，PI的方法侧重于所产生的结垢的溶解。在这方面，该战略在研究相互作用的化学、界面现象和溶解过程中的传输机制(例如，质量传递、流体流动)方面是全面的；它还利用与工业相关的配置和化学来执行测试。这项研究可能会产生另一种环境友好的矿藏溶解隔离剂。具体地说，在石油加工管道和相关设备中发现的鳞片沉积物中普遍存在重晶石是一个重要的问题领域；这是一种可能有利于工艺和环境经济的绿色化学解决方案。

Grant, Christine S.North Carolina State U "GOALI: The Use of Sequestrants for the Dissolution of Scaling Deposits"The primary goal of this research is to elucidate the transport and interfacial mechanisms responsible for the dissolution of mineral salts in the presence of environmentally benign chelating polymer(s). In this study, barite is selected as the major working material due to its prevalence in scale deposits found in petroleum processing pipes and associated equipment. The PI has established that at a specific pH, there are multiple polymer species present in solution. The behavior of these individual species and their cooperative influence on the rate of dissolution is crucial to understanding the dissolution process. Dissolution studies will be conducted in different pH regimes corresponding to a study of the various dominating polymer ligand species in solution.The GOALI component of this proposal will occur with Dr. Ian Collins, a Scale Management Consultant in the Well Performance Team of the Upstream Technology Group at British Petroleum in the UK. There are three aspects of the new BP interaction: (i) BP researchers will provide technical information and "research grade" and "field grade" barite samples for controlled hydrodynamic rotating disk studies; (ii) specific conditions for dissolution experiments will be developed in conjunction with BP researchers and actual field engineers to insure relevance to current and future petroleum exploration activities; (iii) the BP research staff will serve in an advisory role to the student researchers on the projects. The PI will also continue to utilize the expertise of the chemists at Donlar Corporation in the chemical reaction kinetics sequences for the process.Broader Impacts:Preliminary batch testing of barium sulfate in the presence of thermal polyaspartates, indicate there is an inhibition of dissolution at specific conditions. In the proposed research, The PI expects to see enhanced dissolution of the barite, a common species in petroleum processing scale at specific conditions of pH, shear, polymer concentration/type. This will correspond to a specific combination of polymer conformation/adsorption resulting in unique dissolution mechanism. There should be variations in the behavior on pure minerals and for mineral composites that represent actual industrial conditions.In contrast to studies that seek to inhibit the formation of mineral scales on piping and equipment, the PI's approach focuses on the dissolution of the resulting scale. In this regard, the strategy is comprehensive in its study of the chemistry of interaction, the interfacial phenomena and the transport mechanisms (e.g., mass transfer, fluid flow) during the dissolution process; it also utilizes industrially relevant configurations and chemistries to perform the testing. This research could result in alternative environmentally benign sequestering agents for the dissolution of mineral deposits. Specifically, the prevalence of barite in scale deposits found in petroleum processing pipes and associated equipment is a significant problem area; a green chemistry solution that could benefit the economics of the process and the environment.