Feasibility of combined coal and natural gas production of methanol

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Let’s discuss the first point: the co-production of methanol from coal and natural gas. Is there already a process in which the syngas derived from natural gas and that derived from coal are combined to produce methanol? Is such an approach feasible? What are the problems? Second, for the co-production of methanol from coal and natural gas, how should it be calculated? What is the amount of coal and natural gas required per ton of methanol produced? Please provide examples for analysis. Third, with 800 million cubic meters of natural gas plus coal, 1.8 million tons of methanol can be produced; subsequently, 300,000 tons of propylene and 300,000 tons of ethylene can be manufactured (using UOP’s MTO technology). What is the approximate total investment required for this? Fourth, which type of furnace is suitable for coal gasification while keeping costs low? What are the advantages and disadvantages of using SHELL furnaces? Fifth. Conversion of natural gas: Is a steam-based method better, an autothermal method better, or some other process? Welcome to the discussion, as this topic seems to be quite popular these days. I hope that the senior teachers here can share their opinions.