为什么生物质能耦合碳捕集封存（BECCS）能实现负排放？
Why can bioenergy with carbon capture and storage (BECCS) achieve negative emissions?
植物生长通过光合作用把大气二氧化碳固定进生物质，燃烧这些生物质发电时再把碳释放，若配套捕集并地质封存所排放的二氧化碳，整个链条从大气中净移除碳。其负排放能力取决于可持续生物质供应、土地与水的真实核算，以及封存的长期可靠性。
Plants fix atmospheric CO2 into biomass via photosynthesis; burning that biomass for power releases the carbon, and if the emitted CO2 is captured and geologically stored, the chain yields a net removal from the atmosphere. Its negative-emission potential depends on sustainable biomass supply, honest land- and water-accounting, and long-term storage reliability.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Twidell & Weir，《可再生能源资源》（第3版）
Twidell & Weir, 'Renewable Energy Resources' (3rd ed.)
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL5479870W：Renewable energy resour
#BECCS #负排放 #生物质 #地质封存
直接空气捕集能耗高的根本原因是什么，当前哪些方向有望降低它？
What is the root cause of direct air capture's high energy cost, and which directions may reduce it?
根本原因是大气中二氧化碳分压极低，必须把海量空气与吸附剂充分接触并以高温或真空解吸，导致风机与再生能耗巨大。降温方向包括开发低再生热、高选择性的固体吸附剂，利用余热或低碳电，以及把捕集与高值利用（如燃料合成）耦合以提高经济性。
The root cause is the extremely low CO2 partial pressure in air, forcing huge air contact with sorbents and high-temperature or vacuum desorption, so fan and regeneration energy dominate. Promising reductions include low-regeneration-heat, highly selective solid sorbents, waste heat or low-carbon electricity, and coupling capture with high-value use such as fuel synthesis.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Science（DAC 能耗与经济性）
Science (DAC energy use and economics)
#直接空气捕集 #吸附剂 #再生能耗 #分压
发电厂烟道气碳捕集面临的主要工程挑战是什么？
What are the main engineering challenges of carbon capture from power-plant flue gas?
烟道气体积大、二氧化碳浓度相对低且含水蒸气与杂质，捕集溶剂再生能耗高会显著削减电厂净效率（常称能效惩罚）。还需解决设备腐蚀、溶剂降解与大型吸收塔的占地成本，使整体成本与系统兼容性成为部署关键。
Flue gas is large in volume with relatively low CO2 concentration and contains water vapor and impurities, so solvent regeneration consumes energy that notably cuts net plant efficiency (the energy penalty). Corrosion, solvent degradation, and the footprint and cost of large absorbers also matter, making overall cost and system compatibility the deployment bottleneck.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
陈敏恒 丛德滋 方图南 等 编,《化工原理》第3版,化学工业出版社,2006
Chen Minheng et al., Chemical Engineering Principles, 3rd ed., Chemical Industry Press, 2006
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787502582517（豆瓣书目条目: 化工原理）
#点源捕集 #烟道气 #能效惩罚 #溶剂再生
海洋碱度增强作为负排放手段，其基本原理是什么？
What is the basic principle of ocean alkalinity enhancement as a negative-emission approach?
向海洋添加碎石灰岩、橄榄石等碱性矿物或电解提升碱度，可促使海水更多溶解并长期封存大气二氧化碳，同时缓解海洋酸化。该方法理论容量巨大，但需谨慎评估对海洋生态、沉积与碳核算的潜在影响。
Adding alkaline minerals such as crushed limestone or olivine, or electrochemically raising alkalinity, lets seawater dissolve and durably store more atmospheric CO2 while easing ocean acidification. The theoretical capacity is huge, but potential effects on marine ecology, sedimentation, and carbon accounting must be carefully assessed.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Zheng 等,《Ocean alkalinity enhancement as a technology of ocean negative carbon emission: status, potential, and challenges》,Marine Environmental Science,2026 (DOI: 10.3724/j.1007-6336.2026-0013)
Zheng et al., 'Ocean alkalinity enhancement as a technology of ocean negative carbon emission: status, potential, and challenges', Marine Environmental Science, 2026, DOI: 10.3724/j.1007-6336.2026-0013
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.3724/j.1007-6336.2026-0013
#海洋碱度 #负排放 #二氧化碳溶解 #海洋酸化
二氧化碳矿化封存是把碳转化成什么物质来实现长期稳定？
Into what form does CO2 mineralization convert carbon to achieve long-term stability?
矿化利用富含钙、镁的硅酸盐或工业废渣（如钢渣、粉煤灰）与二氧化碳反应生成稳定的碳酸盐，如碳酸钙、碳酸镁。生成物化学性质稳定、无泄漏风险，可就地用于建材或回填，是实现永久封存的一条安全路径。
Mineralization reacts CO2 with calcium- or magnesium-rich silicates or industrial residues such as steel slag and fly ash to form stable carbonates like calcium and magnesium carbonate. The products are chemically stable and leak-proof, and can be used in situ as building materials or backfill, offering a safe permanent-storage route.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Nature Materials（碳矿化材料）
Nature Materials (carbon mineralization materials)
#二氧化碳矿化 #碳酸盐 #工业废渣 #永久封存
胺法吸收捕集二氧化碳的基本原理是什么？
What is the basic principle of amine absorption for capturing carbon dioxide?
烟气通过含醇胺（如 MEA）的吸收塔时，二氧化碳与胺可逆反应生成不稳定盐，在低温下被吸收；富液加热到约 120 摄氏度左右又在解吸塔释放高浓度二氧化碳并再生胺液。该工艺成熟、应用最广，但再生能耗和胺降解是主要成本与损耗来源。
Flue gas passes through an absorber containing alkanolamines such as MEA, where CO2 reversibly reacts to form labile salts and is absorbed at low temperature; the rich solution is then heated to about 120 °C in a stripper to release concentrated CO2 and regenerate the amine. The process is mature and widely used, but regeneration energy and amine degradation drive most cost and loss.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
陈敏恒 丛德滋 方图南 等 编,《化工原理》第3版,化学工业出版社,2006
Chen Minheng et al., Chemical Engineering Principles, 3rd ed., Chemical Industry Press, 2006
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787502582517（豆瓣书目条目: 化工原理）
#胺法 #二氧化碳吸收 #再生 #碳捕集
直接空气捕集（DAC）与传统的烟囱端碳捕集主要区别在哪里？
What is the main difference between direct air capture (DAC) and conventional flue-gas carbon capture?
传统捕集针对电厂、工厂排放口浓度高（约 10–15%）的二氧化碳；DAC 则从大气（约 420 ppm）中直接提取，浓度极低、处理气量大、能耗更高。DAC 的优点是可部署在任何地点并与封存或利用设施就近组合，适合处理已扩散的存量排放。
Conventional capture targets high-concentration CO2 at plant stacks (about 10–15%), while DAC extracts from the atmosphere at roughly 420 ppm, so the concentration is far lower, the gas volume far larger, and energy use higher. Its advantage is siting anywhere and pairing with nearby storage or utilization, suiting already-diffuse legacy emissions.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
Lackner，《从环境空气中捕集二氧化碳》，《能源》32卷，491–495页（2007）
Lackner, K.S. 'Carbon dioxide capture from ambient air.' Energy 32, 491–495 (2007)
#直接空气捕集 #碳捕集 #二氧化碳 #负排放