Evaluation of energy integration aspects for IGCC-based hydrogen and electricity co-production with carbon capture and storage
Evaluation of energy integration aspects for IGCC-based hydrogen and electricity co-production with carbon capture and storage
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DOI：
10.1016/j.ijhydene.2010.04.160
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发表时间：
2010-07-01
影响因子：
7.2
通讯作者：
Cormos, Calin-Cristian
中科院分区：
文献类型：
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作者：
Cormos, Calin-Cristian
整体气化联合循环（IGCC）是一种利用氧气和蒸汽部分氧化固体原料产生合成气的发电技术。在没有碳捕获的传统 IGCC 设计中，合成气经过净化以去除灰尘和硫化氢，然后发送到联合循环燃气轮机 (CCGT) 进行发电。碳捕获技术预计将在未来几十年减少温室气体排放方面发挥重要作用。在用于碳捕获的改进型 IGCC 设计中，合成气经过催化转化，以最大限度地提高氢气含量，并以二氧化碳的形式浓缩碳物质，随后可以在预燃烧装置中捕获二氧化碳。二氧化碳捕获后，富氢合成气可以在变压吸附（PSA）装置中纯化并输出到外部客户（例如化学工业、质子交换膜燃料电池），也可以用于联合循环燃气轮机（CCGT）发电。本文研究了基于碳捕获与封存（CCS）煤气化工艺的氢电联产方案中最重要的能源和工艺集成问题。所评估的煤基 IGCC 案例可产生约 400 MW 的净电力，并具有 0-200 MW (LHV) 范围内灵活的氢气输出，碳捕获率为 90%。本文的主要重点是评估能源整合方面，以便最大限度地提高工厂的整体能源效率。优化包括主要装置子系统的热电一体化（如气化岛产生的蒸汽的一体化、合成气处理的要求、联合循环发电、动力区PSA尾气的最佳利用、酸气脱除装置的热电需求、空分装置和燃气轮机压缩机的一体化等）、敏感性分析（如对环境条件的影响）。 (C) 2010 T. Nejat Veziroglu 教授。由爱思唯尔有限公司出版。保留所有权利。
Integrated Gasification Combined Cycle (IGCC) is a power generation technology in which the solid feedstock is partially oxidized with oxygen and steam to produce syngas. In a conventional IGCC design without carbon capture, the syngas is purified for dust and hydrogen sulphide removal and then sent to a Combined Cycle Gas Turbine (CCGT) for power generation. Carbon capture technologies are expected to play an important role in the coming decades for reducing the greenhouse gas emissions. In a modified IGCC design for carbon capture, the syngas is catalytically shifted to maximize the hydrogen level and to concentrate the carbon species in the form of carbon dioxide which can be later captured in a pre-combustion arrangement. After carbon dioxide capture, the hydrogen-rich syngas can be either purified in a Pressure Swing Adsorption (PSA) unit and exported to the external customers (e.g., chemical industry, PEM fuel cells) or used in a CCGT for power generation.This paper investigates the most important energy and process integration issues for hydrogen and electricity co-production scheme based on coal gasification process with carbon capture and storage (CCS). The evaluated coal-based IGCC case produces around 400 MW net electricity and has a flexible hydrogen output in the range of 0-200 MW (LHV) with a 90% carbon capture rate. The principal focus of the paper is on the evaluation of energy integration aspects so as to maximize the overall plant energy efficiency. Optimization includes heat and power integration of the main plant sub-systems (e.g., integration of steam generated in gasification island, with the requirements for syngas treatment, power generation in the combined cycle, best use of PSA tail gas in the power block, heat and power demand for acid gas removal unit, integration of air separation unit and gas turbine compressor etc.), sensitivity analysis (e.g., influence on ambient conditions). (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.