Carbon Capture Configurations For Biohydrogen Plant

工作计划工作计划假设项目将在48个月内进行，并将纳入以下工作流程：工作流1：过程模拟建模目标：使用Aspen代码进一步开发热电厂过程模拟模型，以实现对过程输出的可靠预测。该工作流程将包括以下任务：i.审查/分析斯温登工厂和UCL工厂产生的历史和新的实验数据，以修订Aspen工艺模型中使用的合成气升级包(即水、气变换和二氧化碳分离)的投入。这项任务将与工作流3，任务III互动。为二氧化碳捕集装置开发基于速率的新模型，包括新技术，例如SEWGS压力摆动和温度摆动模式等。修订流程模型，以适应更新的输入。实验观测的数据将与理论(基于热力学和动力学)的预测进行比较。四、根据从工作流程获得的实验数据确定模型的最佳输入。时间表：初步任务I和II将在9个月前完成。任务III将在33个月前完成。可交付成果：每项规定任务的技术报告摘要(一至四)。工作流程2：沸腾床气化和等离子体重整的实验操作目标：利用伦敦大学学院提供的成像技术，调查FBG和等离子体单元的最佳实践操作和设计变化。该工作流程将包括以下任务：i.在伦敦大学学院提供的沸腾床装置中调查碱留量和脱挥行为。对基本参数，如流态化速度、助熔剂加入量、膨胀曲线、混合和分离模式进行了研究，以提供反应器气化质量的总体情况。还研究了改变垃圾进料点对固体混合和循环规律的影响。二、利用伦敦大学学院现有的等离子体重整反应器研究焦油的减少。将研究停留时间、温度、氧化还原电位和等离子体功率等基本参数，以了解对合成气组成和焦油转化时间表的影响：任务I将在24个月前完成，任务II将在36个月前完成：两项实验工作的技术报告。工作流程3：研究热电厂关键操作变量对氢气和二氧化碳产品质量的影响。目的：研究示范装置阶段FBG、等离子转换器和SEWGS的关键操作变量对合成气质量的影响，特别是对合成气中痕量物种的影响，以及最终产品的质量。这将是该项目的主要工作流程，部分实验工作将在斯温登工厂进行。对热电厂的主要运行变量及其对合成气和生物氢质量中残留污染物水平的影响进行系统研究。二、进行技术经济评估，以确定工厂的最佳运行参数。三、进行生命周期评价，以确定工厂的环境影响，并将其与其他低碳氢气生产路线进行比较。时间表：任务I将在36个月前完成。任务二和任务三将在44个月前完成。交付成果：所有任务的技术报告。最终交付成果：48个月前的博士论文。

Workplan The work plan assumes the project will be conducted over 48 months and will incorporate the following work streams: Work stream 1: Process simulation modelling Aim: To further develop thermal plant process simulation model using Aspen+ code to allow reliable prediction of process outputs. The work stream will incorporate the following tasks: i. Review/analysis of historical and new experimental data generated from the Swindon plant and UCL work to revise the inputs to the syngas upgrading packages (namely water gas shift and CO2 separation) used in the Aspen+ process model. This task will be interactive with the work stream 3, Task iii. Develop of new rate based models for CO2 capture plants, including novel technologies, e.g. SEWGS pressure swing and temperature swing modes, etc.iii. Revision of the process model accommodating the updated inputs. The experimentally observed data will be compared to theoretical (thermodynamic and kinetics based) predictions. iv. Define optimal inputs to the model based on experimental data obtained from work stream 3. Schedule: Preliminary tasks i and ii to be completed by month 9. Task iii is to be completed by month 33. Deliverables: Summary technical reports for each of the defined tasks (i-iv). Work Stream 2: Experimental operation of fluid bed gasification and plasma reforming Aim: To investigate best practice operation and design changes of the FBG and plasma units using imaging techniques available at UCL. The work stream will incorporate the following tasks: i. Investigation of alkali retention and devolatilization behaviour in the fluidized bed rig available at UCL. Fundamental parameters such as the fluidization velocity, fluxing addition, expansion profiles and mixing and segregation patterns will be investigated to provide an overall picture of the gasification quality of the reactor. The effect of changing the feed point of the waste into the fluid-bed on the solid mixing and circulation pattern will also be studied. ii. Investigation of tar abatement using existing plasma reforming reactors available at UCL. Fundamental parameters such as residence time, temperature, redox potential and plasma power will be studied to understand effect on syngas composition and tar conversion Schedule: Tasks i to be completed by month 24 and task ii by month 36 Deliverables: Technical report for both experimental works. Work Stream 3: Investigation of the effect of key thermal plant operating variables in thermal plant on the quality of the hydrogen and CO2 products. Aim: To correlate the effect of key operational variables at the FBG, plasma converter and SEWGS in the demo plant stages on the quality of the syngas, especially with respect to the trace species in the syngas, and quality of final products. This will be the principal work stream of the project and part of the experimental work will be undertaken at the Swindon plant. i. A systematic study of the main operating variables of the thermal plant and how they impact the residual contaminant levels in the syngas and biohydrogen quality. ii. Undertake a techno-economic assessment to determine the optimal operating parameters for the plant. iii. Undertake a LCA assessment to determine the environmental impact of the plant and compare it with other low-carbon hydrogen production routes. Schedule: Task i to be completed by month 36. Tasks ii and iii to be completed by month 44. Deliverables: Technical reports for all tasks.Final Deliverable : PhD Thesis by month 48.