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树种类型和潮滩高程对广东湛江高桥红树林碳储量的影响

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热带海洋学报 2024年第2期43卷 108-120页

作者：周治刚岳文李辉权林阳阳广东省土地调查规划院广东广州510075

红树林位于海洋与陆地的交界处,其高效的碳汇能力易受多方面因素的影响。文章通过分析植物生长指标、生物量、植被碳储量和土壤碳储量以及土壤容重等参数,研究了树种类型和潮滩高程对广东湛江高桥区红树林群落碳汇功能的单独作用和耦合... 详细信息

红树林位于海洋与陆地的交界处,其高效的碳汇能力易受多方面因素的影响。文章通过分析植物生长指标、生物量、植被碳储量和土壤碳储量以及土壤容重等参数,研究了树种类型和潮滩高程对广东湛江高桥区红树林群落碳汇功能的单独作用和耦合效应。结果表明,高桥红树林的固碳总量为4.98×10^(10)g,碳密度为107.76×10^(6)g·hm^(-2),土壤碳积累是该红树林固碳的重要贡献。不同潮滩红树林的碳储量受树种差异的影响显著,且低潮滩的红树林碳储量显著高于高潮滩和中潮滩,而潮滩高程仅对无瓣海桑群落的碳储量具有显著影响。无论是植物碳库还是土壤碳库,中潮滩红海榄群落和低潮滩无瓣海桑群落的碳密度最高。红树群落的土壤有机碳含量在垂直方向分布均匀,各土层间无显著差异。在高潮滩和中潮滩,土壤有机碳含量的垂直分布受树种影响,大部分桐花树群落的土壤有机碳含量显著高于同土层的秋茄群落、白骨壤群落和无瓣海桑群落,而树种对低潮滩各土层有机碳含量无显著影响。虽然树种类型和潮滩高程可影响土壤容重与土壤有机碳含量间的作用关系,但线性拟合结果以负相关关系为主。

关键词：红树林树种潮滩高程碳储量容重广东湛江

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煤基固废制备胶凝材料研究进展及应用

洁净煤技术 2024年第2期30卷 316-330页

作者：常瑞祺张建波李会泉曲江山李少鹏李占兵武文粉中国科学院过程工程研究所中国科学院绿色过程与工程重点实验室战略性金属资源绿色循环利用国家工程研究中心北京100090 中国科学院大学化学工程学院北京100049

煤矸石、粉煤灰、气化渣作为煤炭开采—化工转化—燃煤发电等过程产生的固体废弃物,年排放量超过15亿t,综合利用率约60%,主要以低端建工建材消纳为主,市场趋于饱和。随着环保政策趋近,煤基固废的资源化利用新途径开发迫在眉睫。基于煤... 详细信息

煤矸石、粉煤灰、气化渣作为煤炭开采—化工转化—燃煤发电等过程产生的固体废弃物,年排放量超过15亿t,综合利用率约60%,主要以低端建工建材消纳为主,市场趋于饱和。随着环保政策趋近,煤基固废的资源化利用新途径开发迫在眉睫。基于煤基固废具有铝硅酸盐成分、潜在的火山灰活性和特殊的微观结构等胶凝特性,低成本高性能的低碳胶凝材料成为其规模化高值利用的新途径。综述煤基固废胶凝材料的活性激发技术及应用领域。活性激发方面,阐述了物理激发、碱激发和酸激发等活化方式对胶凝材料矿相变化的影响规律和产品性能调控,总结了现有技术的优势和需要解决的问题。应用领域方面,分析了煤基固废胶凝材料在建筑材料、道路修复、环境修复等领域的应用效果。基于上述现状,对煤基固废胶凝材料激发机理研究、组分配比优化、材料环保性能、工程应用推广等未来发展方向进行展望。研究对煤基固废制备胶凝材料具有重要的借鉴意义,为煤基固废规模化利用提供新途径。

关键词：煤基固废胶凝材料活性激发建筑材料道路修复环境修复

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草酸二甲酯催化合成高值化学品研究进展

洁净煤技术 2024年第2期30卷 123-142页

作者：郭凤钦赵丽滟王利国曹妍贺鹏李会泉中国科学技术大学稀土学院江西赣州341000 中国科学院赣江创新研究院江西赣州341000 中国科学院过程工程研究所中国科学院绿色过程与工程重点实验室战略金属资源绿色循环利用国家工程研究中心北京100049

我国富煤、少油和少气的能源结构决定了我国对煤炭资源具有极强的依赖性。因此,如何发挥我国大储量煤炭资源的优势,实现煤炭资源清洁化、低碳化和多元化利用是亟待解决的问题。将不可再生能源煤炭向多元化学品转化,降低对石油、天然气... 详细信息

我国富煤、少油和少气的能源结构决定了我国对煤炭资源具有极强的依赖性。因此,如何发挥我国大储量煤炭资源的优势,实现煤炭资源清洁化、低碳化和多元化利用是亟待解决的问题。将不可再生能源煤炭向多元化学品转化,降低对石油、天然气的消耗和对外依赖,一直是我国煤炭资源利用研究的重点方向。将煤经高温气化为CO和H_(2)后,利用CO和H_(2)合成气合成的草酸二甲酯(DMO)为原料,经催化加氢反应向多种含氧化学品转化是一条已被证实的可行技术路线。随着DMO经过间接加氢反应和连续加氢反应向乙醇酸甲酯(MG)、乙二醇(EG)、乙醇、碳酸二甲酯(DMC)和草酰胺等多种高值化学品转化技术的逐步发展,使我国丰富的煤炭资源得以高效利用,促进了我国能源结构的平衡。围绕DMO向下游产品转化展开详细论述和讨论。根据近年来学者对DMO的研究,DMO初步加氢可得到MG,MG二次加氢可得到EG,EG脱水得到乙醇、C3~C4醇,及DMO氨化制备“新型氮肥”——草酰胺等。重点归纳了各下游产品转化所使用催化剂的研究进展、不同催化剂的催化机理及活性物种的吸附-活化作用机制。详细梳理总结了当前通过引入其他助剂、调控表面酸碱度和引入第二第三金属等提高催化剂性能的方法。针对目前负载型铜基催化剂、铁基催化剂和银基催化剂等在DMO加氢过程中表现出的高选择性和局限性展开了细致的讨论。明确指出了随着产能的不断扩大,铜基催化剂所显现的高温易板结、中毒失活问题,铁基催化剂存在的中间产物加氢能力差及银基催化剂C-O键活化过程作用弱等问题,并进一步对催化剂失活原因和解决方法进行了细致的讨论和分析。详细指出了当前DMO加氢工艺路线存在的问题和挑战,给出了DMO加氢催化剂的未来研究方向和发展趋势。

关键词：草酸二甲酯含氧化学品非均相催化反应机理稳定化机制

Intrinsic kinetics of oxidative dehydrogenation of propane in the presence of CO_2 over Cr/MSU-1 catalyst

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Journal of Natural Gas Chemistry 2011年第3期20卷 311-317页

作者： Haitao liu Zhao Zhang huiquan li Qingze Huang Key Laboratory for Green Process and Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process and Engineering Chinese Academy of Sciences Beijing 100190 China

The intrinsic kinetics of oxidative dehydrogenation of propane with CO2 has been investigated over Cr/MSU-1 catalyst in a fixed bed reactor. Without limitations of both internal and external diffusion, intrinsic kinetic data were obtained under the following conditions： 490-530 °C, space velocity of 3600？6000 mL·h-1·g-1 and 3/1 molar ratio for CO2/C3H8 under normal pressure. Based on Langmuir-Hinshelwood mechanism, the kinetic models were established, and they were validated by statistical analysis. The parameters were estimated using Simplex Method combined with Universal Global Optimization Algorithm. The model, taking the surface reaction process as the rate-determining step, is the best one in agreement with the experimental data.

关键词： intrinsic kinetics propane carbon dioxide oxidative dehydrogenation Cr/MSU-1 catalyst

Removal of Vand Fe from spent denitrification catalyst by using oxalic acid:Study of dissolution kinetics and toxicity

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Green Energy & Environment 2021年第5期6卷 660-669页

作者： Wenfen Wu Chenye Wang Xingrui Wang huiquan li CAS Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China College of Chemical and Engineering University of Chinese Academy of SciencesBeijing100049China

The selective dissolution of V and Fe from spent denitrification catalyst(SDC)with oxalic acid was investigated to minimise their environmental *** dissolution kinetics of different elements from SDC by using 0.1–1.5 mol L^(-1) oxalic acid concentration was studied at 60℃–90℃.V and Fe were preferentially released(65%and 81%)compared with Al,Ti and W within 5 min due to the redox reactions of oxalic *** dissolved fractions of Fe,V,Al,Wand Ti increased with the increase of oxalic acid concentration and reaction *** dissolution kinetic experiments were analysed and controlled diffusion with n0.92).The Arrhenius parameters of the Ea values of Ti,W,V,Fe and Al from SDC with oxalic acid were 30,26,20,19 and 11 kJ mol^(-1),*** obtained Avrami equation of V and Fe was successfully used to predict their leaching behaviour in oxalic *** characteristic leaching procedure revealed that the toxicity risk of Vand Fe metals from SDC after leaching with oxalic acid decreased to below 5 mg kg^(-1) ***,the leaching residua by oxalic acid indicated its safety for the environment.

关键词： Spent denitrification catalyst Oxalic acid Dissolution kinetic Avrami model

Incentive equilibrium strategies of transboundary industrial pollution control under emission permit trading

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Journal of Management Analytics 2019年第2期6卷 107-134页

作者： huiquan li Shiping Mao Institute of Agricultural Economics and Development Chinese Academy of Agricultural SciencesBeijingPeople’s Republic of China

In this paper,we investigate the incentive equilibrium strategies of two neighboring regions facing transboundary industrial pollution under abatement investment and emission permits trading in a differential game *** paper can be viewed as an extension of the work of Yeung[*** consistent cooperative solution in a differential game of transboundary industrial *** of Optimization Theory and Applications,134,143-160]in the context of the transboundary industrial *** with the work of Yeung[*** consistent cooperative solution in a differential game of transboundary industrial *** of Optimization Theory and Applications,134,143-160],our research significant features(i)introduce the emission permits trading into the transboundary industrial pollution control;(ii)take into account the pollution abatement investment;(iii)examine the incentive equilibrium strategies of transboundary industrial pollution control;and(iv)design an allocation mechanism for regions’cooperative ***,we illustrate the results of the paper with a numerical *** utility of this paper is how to make incentive equilibrium strategies in a situation where the neighboring regions facing transboundary industrial pollution under abatement investment and emission permits trading in a differential game setting.

关键词： incentive equilibrium transboundary pollution pollution abatement investment emission permit trading

Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na_2O–CaO–SiO_2–H_2O

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Chinese Journal of Chemical Engineering 2017年第10期25卷 1539-1544页

作者： Ganyu Zhu huiquan li Shaopeng li Xinjuan Hou Xingrui Wang Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of Sciences School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences

In Na_2O–CaO–SiO_2–H_2O system,systematic investigations of phase and morphology of calcium silicate in hydrothermal conditions were concisely conducted for high-value utilization of silicon resource in high-alumina fly ash(HAFA).The results show that crystal composition and phase may be affected by relatively low concentration of NaOH,and sodium ions are rearranged into the structure to form NaCaHSiO_4 and Na_2Ca_3H_8Si_2O_(12) with different C/S ratio at high concentration of Na *** addition,phases in wollastonite group possess the morphology of nano *** of nano fiber is attributed to the difference of surface energies between axial and radial direction,and higher temperatures lead to easier growth along radial *** preparation of C–S–H with different phases and morphologies can guide for the application of silicate solution with high alkalinity with different purposes.

关键词： Crystallization Hydrothermal Calcium silicate Nanofiber

Kinetics of the decomposition of dimethylhexane-1,6-dicarbamate to1,6-hexamethylene diisocyanate

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Chinese Journal of Chemical Engineering 2015年第5期23卷 775-779页

作者： Yan Cao huiquan li Ningbo Qin Ganyu Zhu National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process Engineering Chinese Academy of Sciences

The kinetics of the decomposition of dimethylhexane-1,6-dicarbamate to 1,6-hexamethylene diisocyanate was studied. A consecutive reaction model was established and the reaction orders for the two steps were confirmed to be 1 and 1.3 by the integral test method and the numerical differential method, respectively. The activation energies of the two steps were （56.94 4±5.90） kJ·mol^-1 and （72.07±3.47） kJ·mol^-1 with the frequency factors exp（ 12.53±1.42） min^- 1 and （ 14.254±0.84） tool^-0.33. L^0.33·min^-1, respectively. Based on the kinetic model obtained, the progress of the reaction can be calculated under given conditions.

关键词： Kinetics 1 6-Hexamethylene diisocyanate Decomposition Dimethylhexane-1 6-dicarbamate

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化工冶金跨行业耦合二氧化碳循环利用技术

洁净煤技术 2024年第4期30卷 171-178页

作者：李双德李振荣董笑陈为刘一凡李少鹏程景才李会泉陈运法中国科学院过程工程研究所北京100190 中国科学院大学北京100049 中国科学院山西煤炭化学研究所山西太原030001 中国科学院上海高等研究院上海201210

双碳战略是国家重大战略,也是推动国家经济高质量可持续发展的必由之路。我国碳达峰到碳中和时间短、任务重。我国化工冶金每年碳排放约36亿t,约占全国工业碳排放量的36%,此外化工冶金废气、固废、废热产生量大、堆存量多、难利用、循... 详细信息

双碳战略是国家重大战略,也是推动国家经济高质量可持续发展的必由之路。我国碳达峰到碳中和时间短、任务重。我国化工冶金每年碳排放约36亿t,约占全国工业碳排放量的36%,此外化工冶金废气、固废、废热产生量大、堆存量多、难利用、循环利用率低。发展化工冶金低碳化转型和变革,是我国工业领域双碳目标实现的根本保证。我国化工冶金历时百年,已发展成熟,仅通过原料燃料替代及绿色工艺转型减碳容量有限,亟需开展化工冶金跨行业耦合与循环利用技术变革,深入推动工业领域减碳。我国化工冶金大多是孤立、非循环连续工艺过程,引起跨行业耦合难、循环利用难度大的问题。针对上述问题,首先分析了化工冶金行业碳排放治理现状及国家战略需求;其次,提出了废气与废热耦合热化学转化制高质气体、废气与废气耦合定向催化制高端化学品、废气与固废耦合制低碳材料3个减碳增效策略。结合其技术发展现状和趋势,提出了拟重点发展的化工冶金跨行业耦合二氧化碳循环利用技术,以期为工业低碳绿色发展提供支撑。

关键词：化工冶金二氧化碳碳减排跨行业耦合循环利用

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