Life cycle assessment of hydrogen production from underground coal gasification

Verma, Arun; Kumar, Amit

doi:10.1016/j.apenergy.2015.03.009

Cited by 121 publications

(38 citation statements)

References 34 publications

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“…The whole gasification of lignite last for 15 h, wherein a product gas with hydrogen concentrations as high as 69.62% and average calorific value of 12.46 MJ/Nm 3 could be obtained in stabilization stage of steam gasification. The model test in this study once again verifies that a large scale of hydrogen may be manufactured from UCG [6,[26][27][28]. After the experiment, the remained UCG semi-coke samples were collected and preserved for leaching experiment.…”

Section: Gasification By Air/steam Two-stage Methodssupporting

confidence: 58%

The environmental effect of underground coal gasification semi‐coke on confined groundwater

Chen

Xing

et al. 2016

Env Prog and Sustain Energy

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From the health and environmental point of view, the control of soluble metal elements and organic compounds in underground coal gasification (UCG) by-product is of great importance for groundwater protection. Unlike the leaching of gasification ash as well as leaching in normal pressure, the leaching of trace elements and organics from UCG semicoke into confined groundwater has received little concern. In this research, UCG model test of Inner Mongolia lignite was performed, the obtained UCG semi-coke was then soaked by applying stainless steel leaching column at 0.5, 1.0, 1.5 and 2.0 MPa with nitrogen as pressurizing agent, the concentrations of trace element and total organic carbons (TOC values) in lixiviums were finally determined by applying ICP-MS and TOC analyzer to investigate the slight leaching in confined groundwater. The results indicate that Cd, Co, Cr, Ni, Pb and V are undetected in all lixivium samples, and compared with soaking under normal pressure, the concentrations of As, Ba, Mn and Sr are lower in confined water. TOC values in lixivium samples approximately approach to the background value of groundwater, indicating that no extra organic compounds could be leached and TOC values also show the similar changing trend as As, Ba, Mn and Sr behave under normal and high pressures.

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Section: Gasification By Air/steam Two-stage Methodssupporting

confidence: 58%

The environmental effect of underground coal gasification semi‐coke on confined groundwater

Chen

Xing

et al. 2016

Env Prog and Sustain Energy

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“…For the same process, Cetinkaya et al [8] report a GWP value of 11.893 while Spath and Mann [5] report a value 11.8 kg CO 2-eq/kg H 2 . Even, in the fossil-based system can offer promising improvement of the environmental performance when integrated with carbon capture and storage [51]. Coupling SMR with carbon capture and storage (CCS) can produce a GWP of 3.4 kg CO 2-eq/kg H 2 which is significantly lower than SMR stand-alone system.…”

Section: Midpoint Environmental Performancementioning

confidence: 99%

“…Coupling SMR with carbon capture and storage (CCS) can produce a GWP of 3.4 kg CO 2-eq/kg H 2 which is significantly lower than SMR stand-alone system. Verma and Kumar [51] highlighted that H 2 production from integrated coal-CCS is more environmentally benign than SMR-CCS. The authors estimated that the net life cycle GHG emissions are 0.91 and 18.00 kg CO 2 -eq/kg H 2 in H 2 production from coal gasification with and without CCS, respectively.…”

Section: Midpoint Environmental Performancementioning

confidence: 99%

Life Cycle Assessment and Water Footprint of Hydrogen Production Methods: From Conventional to Emerging Technologies

et al. 2018

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A common sustainability issue, arising in production systems, is the efficient use of resources for providing goods or services. With the increased interest in a hydrogen (H 2 ) economy, the life-cycle environmental performance of H 2 production has special significance for assisting in identifying opportunities to improve environmental performance and to guide challenging decisions and select between technology paths. Life cycle impact assessment methods are rapidly evolving to analyze multiple environmental impacts of the production of products or processes. This study marks the first step in developing process-based streamlined life cycle analysis (LCA) of several H 2 production pathways combining life cycle impacts at the midpoint (17 problem-oriented) and endpoint (3 damage-oriented) levels using the state-of-the-art impact assessment method ReCiPe 2016. Steam reforming of natural gas, coal gasification, water electrolysis via proton exchange membrane fuel cell (PEM), solid oxide electrolyzer cell (SOEC), biomass gasification and reforming, and dark fermentation of lignocellulosic biomass were analyzed. An innovative aspect is developed in this study is an analysis of water consumption associated with H 2 production pathways by life-cycle stage to provide a better understanding of the life cycle water-related impacts on human health and natural environment. For water-related scope, Water scarcity footprint (WSF) quantified using Available WAter REmaining (AWARE) method was applied as a stand-alone indicator. The paper discusses the strengths and weaknesses of each production pathway, identify the drivers of environmental impact, quantify midpoint environmental impact and its influence on the endpoint environmental performance. The findings of this study could serve as a useful theoretical reference and practical basis to decision-makers of potential environmental impacts of H 2 production systems.

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“…Hydrogen, when produced from renewable biomass sources, has been regarded as an ideal energy carrier for the sustainable energy development [1][2][3][4][5][6][7][8]. Among the various biomass-derived feedstocks, bio-ethanol is considered as one of the most promising alternatives because of its relatively high hydrogen content, availability and non-toxicity [9,10].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production from ethanol over Ir/CeO2 catalyst: Effect of the calcination temperature

Zou

Zhang

et al. 2015

Fuel

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Life cycle assessment of hydrogen production from underground coal gasification

Cited by 121 publications

References 34 publications

The environmental effect of underground coal gasification semi‐coke on confined groundwater

The environmental effect of underground coal gasification semi‐coke on confined groundwater

Life Cycle Assessment and Water Footprint of Hydrogen Production Methods: From Conventional to Emerging Technologies

Hydrogen production from ethanol over Ir/CeO2 catalyst: Effect of the calcination temperature

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