Potential and costs of carbon dioxide removal by enhanced weathering of rocks
Potential and costs of carbon dioxide removal by enhanced weathering of rocks
复制标题
通过增强岩石风化去除二氧化碳的潜力和成本
DOI：
10.1088/1748-9326/aaa9c4
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发表时间：
2018
影响因子：
6.7
通讯作者：
Hartmann
中科院分区：
文献类型：
--
作者：
Strefler;Kriegler;Hartmann
目前，岩石的化学风化吸收了约1.1 Gt CO 2 a− 1 ，主要以碳酸氢盐的形式储存在海洋中。增强这种缓慢的自然过程可以从大气中去除大量的CO 2 ，旨在抵消一些不可避免的人为排放，以遵守《巴黎协定》，同时可以减少海洋酸化。我们首次对经济成本、能源需求、技术参数化以及全球和区域碳清除潜力进行全面评估。定义这种潜力的关键参数是晶粒尺寸和风化速率。潜力的主要不确定性与风化速率和可融入土壤的岩体有关。讨论的结果并没有具体解决通过微生物过程、地源养分释放的反馈和生物扰动增强风化的问题。我们不仅评估纯橄榄岩，主要含有橄榄石（以镁橄榄石的形式）作为先前被认为最适合除碳的矿物，而且还关注玄武岩，以尽量减少潜在的负面影响。我们的结果表明，增强风化是二氧化碳去除的一种选择，对于纯橄榄石，其去除量为 60 US $ t− 1 CO 2 ，但对于玄武岩，其去除量仅为 200 US $ t− 1 CO 2 ，具有竞争力。农田区域的潜在碳去除量对于纯铜岩可能高达 95 Gt CO 2 a− 1，对于玄武岩可能高达 4.9 Gt CO 2 a− 1。最适合的地点是温暖潮湿的地区，特别是印度、巴西、东南亚和中国，这些地区可以实现全球近 75% 的潜力。这项工作提出了一个技术经济评估框架，该框架还允许纳入进一步的流程。
The chemical weathering of rocks currently absorbs about 1.1 Gt CO 2 a− 1 being mainly stored as bicarbonate in the ocean. An enhancement of this slow natural process could remove substantial amounts of CO 2 from the atmosphere, aiming to offset some unavoidable anthropogenic emissions in order to comply with the Paris Agreement, while at the same time it may decrease ocean acidification. We provide the first comprehensive assessment of economic costs, energy requirements, technical parameterization, and global and regional carbon removal potential. The crucial parameters defining this potential are the grain size and weathering rates. The main uncertainties about the potential relate to weathering rates and rock mass that can be integrated into the soil. The discussed results do not specifically address the enhancement of weathering through microbial processes, feedback of geogenic nutrient release, and bioturbation. We do not only assess dunite rock, predominantly bearing olivine (in the form of forsterite) as the mineral that has been previously proposed to be best suited for carbon removal, but focus also on basaltic rock to minimize potential negative side effects. Our results show that enhanced weathering is an option for carbon dioxide removal that could be competitive already at 60 US $ t− 1 CO 2 removed for dunite, but only at 200 US $ t− 1 CO 2 removed for basalt. The potential carbon removal on cropland areas could be as large as 95 Gt CO 2 a− 1 for dunite and 4.9 Gt CO 2 a− 1 for basalt. The best suited locations are warm and humid areas, particularly in India, Brazil, South-East Asia and China, where almost 75% of the global potential can be realized. This work presents a techno-economic assessment framework, which also allows for the incorporation of further processes.
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影响因子：
--
作者：
R. Garrels;A. Lerman;F. Mackenzie
通讯作者：
R. Garrels;A. Lerman;F. Mackenzie
玄武岩粉的溶解及其对 Oxisol 化学性质和可可生长的影响
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
M. Anda;J. Shamshuddin;C. Fauziah;S. Omar
通讯作者：
S. Omar
DOI：
10.1007/978-0-387-73563-4_6
发表时间：
2008
期刊：
--
影响因子：
--
作者：
J. Bandstra;S. Brantley
通讯作者：
J. Bandstra;S. Brantley
DOI：
10.1016/j.ijggc.2009.07.001
发表时间：
2009-12-01
影响因子：
3.9
作者：
Hangx, Suzanne J. T.;Spiers, Christopher J.
通讯作者：
Spiers, Christopher J.
利用岩石和矿物进行农业：挑战与机遇
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
P. Straaten
通讯作者：
P. Straaten