脱碳高闪气回收装置项目总结

通过采用真空变压吸附工艺(VPSA)回收四套湿法脱碳装置高闪气中的有效成分,既回收了有效气体(H2回收率达92%),减少了二氧化碳排放,还带来了巨大的经济效益。     

二氧化碳再生塔塔顶压力调节阀故障分析及改进

针对布朗工艺脱碳系统二氧化碳再生塔塔顶压力调节阀在生产运行中出现的问题,进行系统分析,确认阀门共振是事故多发的主要原因,采取有针对性的改进和预防措施。     

苯菲尔脱碳活化剂国产替代应用探讨

海洋石油富岛有限公司脱碳系统采用苯菲尔热钾碱法脱除CO₂,采用两段吸收两段再生工艺,活化剂为ACT-1。因特殊原因,脱碳装置使用活化剂ACT-1断供,为了维持脱碳装置的效果,确保装置达标稳定运行,2021年9月1日~6日,在脱碳系统中使用206新型活化剂代替原活化剂ACT-1,初步应用表明,206新型活化剂能够有效提高溶液的吸收和再生效果,改善气体质量,同时可较好地控制溶液对设备及管线的腐蚀,其工业应用效果良好,具有现实推广价值。     

“双碳”背景下现代煤化工高质量发展研究

“双碳”目标的提出指明了绿色低碳、清洁高效是能源发展的方向。现代煤化工是煤炭清洁转化利用的有效方式,对保障国家能源安全有重要战略意义,但仍属于高碳排放产业,探寻煤化工高端化、低碳化、多元化发展路径迫在眉睫;分析了现代煤化工产业发展现状及面临的挑战,认为通过坚持科技创新,推进煤化工与其他产业协同融合发展,可以加快现代煤化工产业转型升级,实现高质量发展。     

Consumption effects of electricity decarbonization: Evidence from California and the Pacific Northwest

This paper estimates the price-induced impacts of decarbonization policy on CO₂ emissions in California and the Pacific Northwest. We document that retail demands for electricity and natural gas by customer class are highly price-inelastic. Based on the heat rates of natural-gas-fired generation, we find that a 10% electricity rate increase due to electricity decarbonization may not have the consumption effects of further reducing the region’s CO₂ emissions.     

高转化率与低碳排放重油加工路线的研究

通过对几种加氢方案(VRDS方案、浆态床方案、沸腾床方案)、脱碳方案(焦化方案)以及组合方案(焦化方案+沸腾床方案)进行系统研究,考察了重油加工路线对油品收率和碳排放的影响,并进行了效益对比分析。结果表明,加氢路线的轻油收率高,碳排放高。无论是否征收碳税,加氢路线的效益均高于脱碳路线的效益,但投资较高。在3种加氢路线中,浆态床方案的轻油收率最高,碳排放居中,投资较少,效益最好;沸腾床方案的轻油收率最低,投资最高,效益最差;VRDS方案的碳排放最高,轻油收率居中,投资和效益也居中。焦化方案和沸腾床方案组合方案轻油收率和效益明显提高。     

空间位阻胺TBEE对天然气中酸气吸收的研究

在低碳硫比的条件下(H2S体积分数3.0%,CO2体积分数5.0%),考察了温度与胺液体积分数对吸收效果的影响,结果表明,反应温度40℃、胺液体积分数35%~45%为最佳反应条件。对比了MDEA与TBEE对模拟天然气中H2S和CO2的脱除性和选择性,并研究了MDEA与TBEE复配形成的混合溶液对酸气的吸收情况,实验结果显示,TBEE的选择性大于MDEA的选择性,且TBEE对CO2和H2S的吸收效果明显优于MDEA,随着空间位阻胺TBEE在溶液中所占比例的增加,选择性和碳硫容逐渐增加。复合溶液能耗低于MDEA溶液。     

Decarbonization and chromium conservation thermodynamics of partial CO2 instead of Ar or O2 in AOD furnace

Decarbonization and chromium conservation technology is mainly achieved by blowing O2 and Ar during the traditional AOD furnace smelting process. The CO2 emissions per ton of steel production in the steel industry are about 1. 57t. If the CO2 emissions can be collected and recycled in the steel production process, it can not only save energy and reduce emissions, but also reduce the cost of smelting. The feasibility of using CO2 instead of Ar or O2 to be injected for smelting stainless steels was verified by thermodynamic calculations. The reaction limits of the different carbon content, the rising and falling temperature of elemental oxidation, the reaction rate under different ratios of CO2 injection, the depth of decarburization, and the result of chromium retention were also calculated. The thermodynamic mechanism of blowing CO2 to replace O2 decarburizing and protecting chromium was analyzed. The results show that blowing CO2- O2 mixed gas in high carbon zone is conducive to decarbonization and chromium conservation in the AOD smelting process. With the increase of CO2 ratio, the effect of chromium retention is enhanced whereas the decarburization rate is reduced. When the CO2 injection amount is increased, the decarburization reaction rate in the molten pool is too slow, causing the molten pool temperature to be low, and the CO2 injection ratio should be controlled between 20 vol.% and 40 vol.%.     

CO2-O2混合喷吹工艺冶炼不锈钢的基础研究

经过大量理论计算与实验室试验,北京科技大学研究人员成功将CO2-O2混合喷吹(COMI)工艺应用到不锈钢的冶炼中。试验结果表明,COMI工艺不影响不锈钢的正常冶炼,且可促进熔池脱碳保铬,减少镍损,利于不锈钢质量的提高。此外,该工艺利用部分CO2代替O2和Ar,吨钢节约成本20～45元,循环利用CO2,利于低碳经济的发展。     

用变换气代替脱碳气的试验研究和理论计算

文章针对上海石洞口煤气制气有限公司提出的用变换气代替脱碳气,进行了一系列试验研究和相关的理论计算,对加氢催化剂的选择和操作提出了参考意见,并得出取消脱碳系统直接用变换气作返氢气是可行的。